[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

EP0812003A2 - Infrared radiator and its manufacturing procedure - Google Patents

Infrared radiator and its manufacturing procedure Download PDF

Info

Publication number
EP0812003A2
EP0812003A2 EP97109108A EP97109108A EP0812003A2 EP 0812003 A2 EP0812003 A2 EP 0812003A2 EP 97109108 A EP97109108 A EP 97109108A EP 97109108 A EP97109108 A EP 97109108A EP 0812003 A2 EP0812003 A2 EP 0812003A2
Authority
EP
European Patent Office
Prior art keywords
heating coil
infrared radiator
twin tube
connecting body
heating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97109108A
Other languages
German (de)
French (fr)
Other versions
EP0812003A3 (en
EP0812003B1 (en
Inventor
Werner Kreuter
Frank Brehm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heraeus Noblelight GmbH
Original Assignee
Heraeus Noblelight GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heraeus Noblelight GmbH filed Critical Heraeus Noblelight GmbH
Publication of EP0812003A2 publication Critical patent/EP0812003A2/en
Publication of EP0812003A3 publication Critical patent/EP0812003A3/en
Application granted granted Critical
Publication of EP0812003B1 publication Critical patent/EP0812003B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/18—Mountings or supports for the incandescent body
    • H01K1/24—Mounts for lamps with connections at opposite ends, e.g. for tubular lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/06—Attaching of incandescent bodies to mount
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K7/00—Lamps for purposes other than general lighting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated

Definitions

  • the invention relates to an infrared radiator, with a twin tube, which has an inner web, which separates two partial spaces running in the longitudinal direction of the tube, and with a first heating coil arranged in the first of the partial spaces, which has a first, lower end with a through an end face of the Twin tube is supplied to the outside power supply, and which is electrically connected with its second, upper end to a connecting wire arranged in the second sub-space or to a second heating coil arranged in the second sub-space.
  • the invention relates to a method for producing an infrared radiator, by providing a twin tube which has an inner web which separates two partial spaces running in the longitudinal direction of the tube, introducing a first heating coil into the first partial space, inserting a connecting wire or a second heating coil into the second subspace, connecting the first, lower end of the first heating coil to a power supply led through an end face of the twin tube, and connecting the second, upper end of the first heating coil to the connecting wire arranged in the second subspace or to the second heating coil arranged in the second subspace .
  • the lamp bulb is designed in the form of a twin tube made of quartz glass, in which two tubular partial spaces are spatially separated from one another by an intermediate web.
  • the twin tube is divided into two equal steel sections over its length.
  • Each of the two sub-rooms of the twin pipe consists of two sub-room halves, a heating coil being arranged in each of the four sub-room halves.
  • each radiator section The heating coils of each radiator section are connected in pairs in series. Each heating coil is provided with a connecting wire for the power supply at its free lower end. The electrical connections for each pair of heating coils are led out of the twin tube at a common end face of the twin tube via a vacuum-tight pinch into which two molybdenum foils are melted.
  • the heating coils of each pair of heating coils are connected to one another by means of an M-shaped bent molybdenum wire.
  • the molybdenum wire engages the upper end of the heating coil and is led back to the heating coil via a first U-shaped bend within the sub-space parallel to the lower end.
  • the inner web is drilled out or milled out over a length of a few centimeters.
  • An incision of a few millimeters remains between the upper edge of the pinch and the bottom of the web bore or milling.
  • the molybdenum wire extends through this incision under a second U-shaped bend into the other partial space, where it is connected to the second heating coil.
  • the molybdenum wire Seen across both subspaces, the molybdenum wire is thus M-shaped, with a mirror plane running in the inner web.
  • the molybdenum wire in the area of the heating coils is covered by a quartz glass capillary tube.
  • the heating coils are held centrally within their sub-space by means of spacers evenly distributed over their length.
  • the heating coil In the known infrared heater, the heating coil is inserted into the twin tube with a high level of force, the spacers abutting the inner walls of the respective subspaces.
  • the heating coil is subjected to strong mechanical loads. After installation, it is not de-energized, so there is a risk that it will become humped during operation or that its length - and thus the length of the heating zone - will change. This leads to failures in the known infrared radiators.
  • the material recrystallizes, which is accompanied by a change in the coil dimensions.
  • the heating coil it is therefore necessary to have the heating coil before Recrystallize assembly.
  • this makes the heating coil brittle, which further complicates its installation in the twin tube.
  • the recrystallization of the heating coil is associated with a high expenditure of time and money.
  • a twin tube radiator is known in which the two heating coils are connected to one another by means of a molybdenum bracket, the molybdenum bracket engaging in the respective ends of the heating coils.
  • a molybdenum bracket In order to facilitate the assembly of the molybdenum bracket, it is proposed to remove the inner web of the twin tube from the end face by milling or drilling. The molybdenum bracket is inserted into the slot created in this way and then the face of the twin tube is squeezed together.
  • the known method requires the processing of the twin tube and the assembly of the molybdenum bracket from the open face.
  • the molybdenum bracket is easily deformable. However, this leads to changes in the position of the heating coils when the heater is used.
  • twin-tube infrared radiator an infrared radiator of double length is produced by melting together two individual radiators at the end, the individual radiators being switchable independently of one another and being separated from one another by a partition.
  • the heating coils are connected in each individual heater by means of a bracket.
  • the bracket is installed in accordance with the molybdenum bracket according to DE-U1 91 15 621.
  • the invention is therefore based on the object of specifying a reliable infrared radiator. Furthermore, the invention is based on the object of specifying a method for producing a radiator which simplifies the assembly of the heating coil.
  • the inner web has a through hole in the region of the upper end of the heating coil or above it, through which a connecting body extends from one sub-space into the other sub-space, by means of which the first heating coil is electrically connected to the connecting wire or to the second heating coil, at least the first heating coil being mounted in the partial space while under tension.
  • a through hole in the inner web is understood to mean any opening in the inner web that is located in the region of the second, upper end of the heating coil or, viewed in the direction of the longitudinal axis of the twin tube, above it, and which is provided by a lateral, opening of the twin tube generated from the outside in can be produced in this area.
  • the connecting body extending through the through hole is electrically connected to the upper end of the heating coil.
  • the heating coil can attack directly on the connecting body.
  • one or more connecting pieces can also be provided between the connecting body and the end of the heating coil. Both variants are referred to below as "connection" with the connection body.
  • the connecting body thus electrically connects the upper ends of the first heating coil and the second heating coil arranged in the adjacent sub-space or a connecting wire arranged there.
  • connection with the connection body.
  • the connecting body thus electrically connects the upper ends of the first heating coil and the second heating coil arranged in the adjacent sub-space or a connecting wire arranged there.
  • the connecting body is arranged in the region of the upper ends of the heating coil, a return line, as in the infrared radiator according to the prior art, is not necessary.
  • the infrared radiator according to the invention only the respective upper ends of the heating coil or heating coil and the connecting wire have to be connected to the connecting body in such a way that a fixed electrical connection is produced.
  • the connecting body can be introduced into the through hole particularly simply through an opening in the side wall of the twin tube. It is neither necessary to cut the twin pipe, insert the connecting body and then melt it again, nor to drill or mill out the inner web before producing a pinch. This considerably simplifies the assembly of the heating coil and the twin tube has no all-round seam.
  • the upper end of the heating coil can be fixed geometrically by the connection with the connecting body. This avoids changing the length of the heating coil and makes it easier to comply with the specified heating zone dimensions. This contributes to the operational safety of the infrared radiator according to the invention.
  • a tension is applied to the heating coil during assembly. This is made possible by the fixing of the upper end of the heating coil by the connecting body.
  • the pre-tension of the heating coil can be adjusted so that the change in length that occurs during operation of the infrared radiator is compensated for and the warping of the heating coil is thereby prevented.
  • This also increases the operational safety of the infrared radiator according to the invention. Due to the geometrical fixation of the filament, recrystallization of the heating filament material, usually tungsten, is not necessary before assembly with this infrared radiator. This will make installation of the heating coil considerably easier.
  • the first heating coil can also extend only over a first section of the first subspace.
  • the second heating coil can be arranged in the first and / or in the second section of the second subspace.
  • the connecting body is designed as a metallic, rigid pin.
  • the pin can be made of molybdenum, for example. It usually extends across both sub-spaces through the through hole in the inner web from the inner wall of the first sub-space to the inner wall of the second sub-space.
  • the pin-shaped connecting body makes it possible to keep the unheated zones between two radially adjacent radiators particularly short. Because the pinch can start directly at the pen.
  • the pin can be easily inserted into the through hole through a hole in the side wall of the twin tube.
  • the hole in the side wall of the twin tube and the through hole can be made in one operation. Because the pin is rigid, a change in the position of the heating coil is avoided.
  • one end of the heating coil or a holding element connected to this end is designed in the form of a hook engaging the connecting body.
  • the hook can be easily connected to the connecting body during assembly.
  • the hook can also be designed in the form of a half-shell, which engages around the connecting element.
  • an embodiment of the infrared radiator according to the invention has proven particularly useful, in which the twin tube is divided over its length into two radiator sections, and a heating coil is provided in at least one of the subspaces of each radiator section.
  • the individual radiator sections can be heated separately from one another.
  • the heating coils of the two heater sections can, however, also be connected in series, in which case the heating coil arranged in different heater sections can be electrically connected by means of a single connecting body.
  • the inner web is advantageously provided with a through hole in each of the radiator sections, both through holes being arranged between the heating coils.
  • An M-shaped connecting part as described in the prior art is not required for the electrical connection of the heating coils arranged in the respective radiator sections.
  • the assembly of such an infrared radiator, in which the individual radiator sections can also be switched separately from one another, is therefore particularly simple.
  • the two connecting parts are inserted through holes in the side wall of the twin tube through the through holes. These holes are then closed. Apart from that, the twin tube can be completely seamless.
  • two heating coils are arranged in each of the radiator sections.
  • the above-mentioned object is achieved, based on the method mentioned at the outset, in that the cylinder jacket surface of the twin tube and the inner web are pierced in the area of the upper end of the heating coil or above it, that a connecting body is inserted into the through hole, which is extends from one compartment into the other compartment, that the connecting body is electrically connected on the one hand to the first heating coil and on the other hand to the connecting wire or to the second heating coil, and that the bore of the cylindrical surface of the twin tube is closed.
  • the bore in the cylindrical surface of the twin tube is produced essentially radially from the outside inwards, the inner web being provided with the through bore at the same time.
  • the drilling can be done, for example, by drilling, cutting, milling, grinding or melting.
  • the connecting body is inserted through the bore from the outside. This considerably simplifies the assembly of the heating coil. Because the measures of the known, as described in the introduction, are not necessary for the production of the connection of the heating coil and the connecting body.
  • the twin tube also has no circumferential seam.
  • the connecting body is used in the area of the upper ends of the heating coil, a return line, as in the infrared radiator according to the prior art, is not necessary. Only the respective upper ends of the heating coils or the heating coil and the connecting wire are connected to the connecting body in such a way that a fixed electrical connection is produced.
  • the upper end of the heating coil is geometrically fixed by the connection with the connecting body. This avoids changing the length of the heating coil and makes it easier to comply with the specified heating zone dimensions. This contributes to the operational safety of the infrared radiator according to the invention.
  • the fixation also enables the heating coil to be subjected to tensile stress during assembly.
  • the pre-tensioning of the heating coil can be adjusted so that a change in length occurring during operation is compensated and warpage of the heating coil is thereby prevented. This also increases the operational safety of the infrared radiator according to the invention.
  • a metallic, rigid pin is advantageously used as the connecting body.
  • the pin In a first preferred procedure for connecting the pin and the heating coil, the pin is inserted into an eyelet which is connected to the heating coil. Alternatively, it has also proven useful to attach the pin to a hook to which the heating coil is connected.
  • the connecting body can also be welded to the eyelet or the hook. In the case of twin tubes made of quartz glass, this can be done from the outside, for example, by means of suitable laser radiation. If the heating coil is mounted under tension, this alone produces a sufficiently stable electrical connection so that this measure is only necessary in special cases. Especially when using non-recrystallized heating coils, which even shrink due to recrystallization during use, the tension ensures a sufficiently firm connection.
  • FIG. 1 A short-wave infrared radiator 1 is shown in FIG. 1 , in which two tubular partial spaces 4, 5 are formed in a twin tube 2 made of quartz glass by means of an inner web 3.
  • a heating coil 6, 7 made of tungsten wire is arranged in each of the subspaces 4, 5 and is held centrally within the subspaces 4, 5 by means of support disks 8.
  • the support disks 8 are evenly distributed over the length of the heating coils 6, 7 at a distance of approximately 15 mm.
  • the free, lower ends 9, 10 of the heating coils 6, 7 are connected to supporting coils 11, 12, and these are each connected to a current lead-through 14, 15 sealed by a pinch 13 of the radiator end.
  • the opposite end of the radiator 1 is also closed by means of a pinch 16.
  • the heating coils 6, 7 are connected in series. For this purpose, their upper ends 17, 18 are electrically connected to one another.
  • the electrical connection is made in each case by means of support coils 19, 20 which engage the upper ends 17, 18 of the heating coils 6, 7 and which are connected to a common contact pin 23.
  • the end of each support helix 17, 18 engaging the contact pin 23 is designed in the form of an eyelet 21, 22.
  • the contact pin 23 has a diameter of approximately 1.5 mm and a length of approximately 2.8 mm. Because of its thickness, the contact pin 23 has a sufficiently high bending stiffness over this length. It extends through a through bore 24 of the inner web 3 over both subspaces 4, 5 and over almost the entire cross section of the twin tube 1.
  • the through bore 24 is arranged about 1 cm above the heating coils 6, 7.
  • a hole with a diameter in the range of 1.5 to 2 mm is drilled into the side of the twin tube 2 (the hole is shown sealed with a quartz glass plug 26 in FIGS. 1a and 1b).
  • the hole is drilled in the lateral boundary wall of the twin tube 2 and the through hole 24 in one operation.
  • the bores were produced using an ultrasound drill. Milling out the inner web, as in the known assembly methods, or cutting off the twin tube for inserting the contact pin are avoided in this assembly method.
  • the twin tube 1 therefore has no circumferential seam in the area of the through bore 24.
  • the heating coils 6, 7 including the support coils 19, 20 are introduced into the subspaces 4, 5. As soon as the eyelets 21, 22 in the projection lie below the hole (quartz glass plug 26) and the through hole 24, the contact pin 23 is threaded through the eyelets 21, 22 from the outside. The heating coils 6, 7 are then pretensioned by means of a tensioning device and the radiator 1 is closed by means of the bruises 13 and 16.
  • the hole is then sealed using the quartz glass plug 26. Otherwise, no glass blowing work is required on the twin tube.
  • the assembly of the heating coils 6, 7 is comparatively simple. Since both ends 9, 10 and 17, 18 of the heating coils 6 are fixed locally are, a recrystallization of the heating coils 6, 7 is not required before their assembly. Furthermore, the installation of the heating coils 6, 7 under mechanical prestress is made possible.
  • the geometric arrangement of the contact pin 23 within the subspaces 4, 5 of the twin tube 2 can be seen from FIG. 1b .
  • the subspaces 4, 5 have an approximately oval cross section.
  • the contact pin 23 extends over both subspaces from the one outer wall of the twin tube 2 to the opposite outer wall.
  • the contact pin 23 is partially guided by means of the through hole 24.
  • the hole in the lateral outer wall of the twin tube 2 is closed by means of the quartz glass plug 26.
  • the eye-shaped end 22 of a support coil connected to the heating coil engages on the contact pin 23.
  • FIGS. 2 and 3 which are explained in more detail below, the same reference numerals are used as in FIG. 1 if the components or components of the infrared radiator designated therewith are the same or equivalent to those components or components as have already been explained with reference to FIG. 1 for the same reference numerals have been.
  • the short-wave infrared radiator 31 according to FIG. 2 differs from the infrared radiator 1 shown in FIGS. 1a and 1b essentially in that it is further divided over its length into two radiator sections 38, 39, in which the heating coils 6a, 7a and 6b, 7b are connected in series.
  • the individual sections 38, 39 which can be switched separately from one another, are essentially mirror-symmetrical to one another, the mirror plane running perpendicular to the sheet plane through the dashed line A.
  • the total length of the infrared radiator 31 is approximately 80 cm. For the sake of clarity, it is shown broken.
  • the infrared radiator 31 comprises a seamless twin tube 32, which is closed on both sides by crushing 13, in which current feedthroughs 14, 15 for the heating coils 6a, 7a and 6b, 7b are melted.
  • the twin tube 32 is divided by an inner web 3 into two spatially divided subspaces 4, 5.
  • the heating coils 6a, 7a or 6b, 7b connected in pairs in series are also electrically connected to one another in this embodiment of the infrared radiator 31 by means of a contact pin 23.
  • Two contact pins 23 are therefore provided here. Seen over the length of the infrared radiator 31, these are arranged approximately in the middle thereof and between the heating coil pairs 6a, 7a and 6b, 7b.
  • the inner web 3 is accordingly provided with two through bores 24 running parallel to one another, through each of which one of the Contact pins 23 extends. Through hole 24 and contact pin 23 are formed correspondingly as in the infrared radiator 1 shown in Figure 1a and 1b.
  • the assembly of the short-wave infrared radiator shown schematically in FIG. 2 is particularly simple in comparison to the infrared radiator known from the prior art, which also has two radiator sections. M-shaped contact brackets, such as have been used so far, are not required in the infrared radiator 31 according to the invention.
  • the respective heating coil pairs 6a, 7a and 6b, 7b are inserted from both ends of the twin tube 32 and connected to each other via the contact pin 23.
  • the respective upper end of the heating coils 6a, 7a, 6b, 7b, which is connected to the contact pin 23, is identified by the reference numbers 17, 18, and its lower end, which is connected to the electrical connection, is identified by the reference numbers 9, 10.
  • Both lateral openings of the twin tube 32 are each closed by means of a glass plug 26. Otherwise, the assembly of the infrared radiator 31 corresponds to that as has already been explained above with reference to the infrared radiator 1 shown in FIG. 1.
  • the twin tube 52 in accordance with the embodiment shown in FIG. 2, is likewise divided into two radiator sections 38, 39 and by an inner web 3 into two tubular partial spaces 4, 5 with an oval cross section.
  • This embodiment differs from the infrared radiator 31 shown in FIG. 2 essentially in that only one heating coil 6b, 7a is provided in each of the two subspaces 4, 5, the two heating coils 6b, 7a being different in their respective radiator sections 4 or 5 are offset.
  • each heating coil 6b or 7a is electrically connected to a connecting wire 55 or 56 arranged in the other subspace 43 or 42.
  • this embodiment corresponds to that according to FIG. 2 with regard to the electrical connection 22, 23, 24, 26 and the mounting of the infrared radiator 51.
  • the twin tube 62 in accordance with the embodiment shown in FIG. 2, is also divided into two radiator sections 38, 39, and by an inner web 3 into two tubular partial spaces 4, 5 with an oval cross section.
  • only one heating coil 6b, 7a is provided in this infrared radiator 61 in each of the two subspaces 4, 5, the two heating coils 6b, 7a being located in their respective radiator sections 38 and 39 are offset.
  • the embodiment of the infrared radiator 61 according to the invention shown in FIG. 4 differs from the infrared radiator 31 shown in FIG. 3 essentially in that the two heating coils 6b, 7a are electrically connected to one another via a contact pin 23 arranged between them.
  • the infrared radiator 61 When the infrared radiator 61 is installed, one of the heating coils 6b and 7a is inserted into the respective subspace 4 and 5 from the two open end faces of the twin tube 62 and, as already explained above with reference to the illustration in FIG. 1, with the contact pin 23 electrically and mechanically connected.
  • the upper ends 17 and 18 of the heating coils 6b and 7a facing the contact pin 23 are connected to half-shell-shaped hooks 66, which partially surround the contact pin 23.
  • the contact pin 23 extends over both subspaces 4, 5 of the infrared radiator 61 through a bore 24 in the inner web 3.
  • the insertion of the contact pin 23 and the assembly of the infrared radiator 61 are otherwise carried out according to the procedures explained with the aid of the preceding exemplary embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Resistance Heating (AREA)
  • Glass Compositions (AREA)

Abstract

The short-wave infrared emitter has a twin parallel tube Ä2Ü of quartz glass. Within the parallel chambers are a pair of tungsten heating filaments Ä6,7Ü and these are supported in discs Ä8Ü that are spaced at uniform intervals along the tube. The ends of the filaments are looped Ä21,22Ü around a common contact pin Ä20Ü that is inserted transversely and sealed . At the other end the ends of the filaments are set into pins Ä11Ü having wires that are crimped into sealed metal couplings Ä14,15Ü.

Description

Die Erfindung betrifft einen Infrarotstrahler, mit einem Zwillingsrohr, das einen Innensteg aufweist, der zwei in Rohr-Längsrichtung verlaufende Teilräume voneinander trennt, und mit einer im ersten der Teilräume angeordneten ersten Heizwendel, die mit ihrem ersten, unteren Ende mit einer durch eine Stirnseite des Zwillingsrohres nach außen geführten Stromzuführung versehen ist, und die mit ihrem zweiten, oberen Ende mit einem im zweiten Teilraum angeordneten Anschlußdraht oder mit einer im zweiten Teilraum angeordneten zweiten Heizwendel elektrisch verbunden ist.The invention relates to an infrared radiator, with a twin tube, which has an inner web, which separates two partial spaces running in the longitudinal direction of the tube, and with a first heating coil arranged in the first of the partial spaces, which has a first, lower end with a through an end face of the Twin tube is supplied to the outside power supply, and which is electrically connected with its second, upper end to a connecting wire arranged in the second sub-space or to a second heating coil arranged in the second sub-space.

Weiterhin betrifft die Erfindung ein Verfahren zur Herstellung eines Infrarotstrahlers, durch Bereitstellen eines Zwillingsrohres, das einen Innensteg aufweist, der zwei in Rohr-Längsrichtung verlaufende Teilräume voneinander trennt, Einbringen einer ersten Heizwendel in den ersten Teilraum, Einbringen eines Anschlußdrahtes oder einer zweiten Heizwendel in den zweiten Teilraum, Verbinden des ersten, unteren Endes der ersten Heizwendel mit einer durch eine Stirnseite des Zwillingsrohres nach außen geführten Stromzuführung, und Verbinden des zweiten, oberen Endes der ersten Heizwendel mit dem im zweiten Teilraum angeordneten Anschlußdraht oder mit der im zweiten Teilraum angeordneten zweiten Heizwendel.Furthermore, the invention relates to a method for producing an infrared radiator, by providing a twin tube which has an inner web which separates two partial spaces running in the longitudinal direction of the tube, introducing a first heating coil into the first partial space, inserting a connecting wire or a second heating coil into the second subspace, connecting the first, lower end of the first heating coil to a power supply led through an end face of the twin tube, and connecting the second, upper end of the first heating coil to the connecting wire arranged in the second subspace or to the second heating coil arranged in the second subspace .

Ein derartiger Infrarotstrahler ist im deutschen Gebrauchsmuster DE-U1 91 13 022 beschrieben. Bei dem bekannten kurzwelligen Infrarotstrahler ist der Lampenkolben in Form eines Zwillingsrohres aus Quarzglas ausgebildet, bei dem zwei rohrförmige Teilräume durch einen Zwischensteg räumlich voneinander getrennt sind.Such an infrared radiator is described in German utility model DE-U1 91 13 022. In the known short-wave infrared radiator, the lamp bulb is designed in the form of a twin tube made of quartz glass, in which two tubular partial spaces are spatially separated from one another by an intermediate web.

Das Zwillingsrohr ist über seine Länge in zwei gleiche Stahler-Abschnitte unterteilt. Jeder der beiden Teilräume des Zwillingsrohres besteht aus zwei Teilraumhälften, wobei in jeder der vier Teilraumhälten eine Heizwendel angeordnet ist.The twin tube is divided into two equal steel sections over its length. Each of the two sub-rooms of the twin pipe consists of two sub-room halves, a heating coil being arranged in each of the four sub-room halves.

Die Heizwendeln jedes Strahler-Abschnittes sind paarweise in Reihe geschaltet. Jede Heizwendel ist an ihrem freien unteren Ende mit einem Anschlußdraht für die Stromversorgung versehen. Die elektrischen Anschlüsse für jedes Heizwendelpaar werden an jeweils einer gemeinsamen Stirnseite des Zwillingsrohres über eine vakuumdichte Quetschung, in die zwei Molybdänfolien eingeschmolzen sind, aus dem Zwillingsrohr herausgeführt.The heating coils of each radiator section are connected in pairs in series. Each heating coil is provided with a connecting wire for the power supply at its free lower end. The electrical connections for each pair of heating coils are led out of the twin tube at a common end face of the twin tube via a vacuum-tight pinch into which two molybdenum foils are melted.

Die Heizwendeln jedes Heizwendelpaares sind jeweils mittels eines M-förmig gebogenen Molybdändrahtes miteinander verbunden. Der Molybdändraht greift an dem oberen Ende der Heizwendel an und wird über eine erste U-förmige Biegung innerhalb des Teilraumes parallel zur Heizwendel bis nahe an das untere Ende zurückgeführt. Im Bereich des unteren Endes des Zwillingsrohres ist der Innensteg über eine Länge von einigen Zentimetern herausgebohrt oder herausgefräst. Zwischen dem oberen Rand der Quetschung und dem Boden der Stegbohrung bzw. -fräsung verbleibt ein Einschnitt von einigen Millimetern. Durch diesen Einschnitt hindurch erstreckt sich der Molybdändraht unter einer zweiten U-förmigen Biegung in den anderen Teilraum, wo er mit der zweiten Heizwendel verbunden ist. Über beide Teilräume gesehen ist der Molybdändraht somit M-fömig gebogen, wobei eine Spiegelebene im Innensteg verläuft. Zur Vermeidung von Kurzschlüssen ist der Molybdändraht im Bereich der Heizwendeln von einem Quarzglas-Kapillarrohr umhüllt.The heating coils of each pair of heating coils are connected to one another by means of an M-shaped bent molybdenum wire. The molybdenum wire engages the upper end of the heating coil and is led back to the heating coil via a first U-shaped bend within the sub-space parallel to the lower end. In the area of the lower end of the twin tube, the inner web is drilled out or milled out over a length of a few centimeters. An incision of a few millimeters remains between the upper edge of the pinch and the bottom of the web bore or milling. The molybdenum wire extends through this incision under a second U-shaped bend into the other partial space, where it is connected to the second heating coil. Seen across both subspaces, the molybdenum wire is thus M-shaped, with a mirror plane running in the inner web. In order to avoid short circuits, the molybdenum wire in the area of the heating coils is covered by a quartz glass capillary tube.

Die Heizwendeln werden mittels über ihre Länge gleichmäßig verteilter Abstandshalter zentrisch innerhalb ihres Teilraumes gehalten.The heating coils are held centrally within their sub-space by means of spacers evenly distributed over their length.

Die Herstellung des bekannten Infrarotstrahlers ist sehr aufwendig und erfordert großes Geschick. Es sind besondere, asymmetrische Abstandshalter erforderlich, um zu gewährleisten, daß trotz des parallel zur Heizwendel zurücklaufenden Molybdändrahtes die Heizwendel jeweils zentrisch innerhalb ihres Teilraumes angeordnet ist.The production of the known infrared radiator is very complex and requires great skill. Special, asymmetrical spacers are required to ensure that, despite the molybdenum wire running back parallel to the heating coil, the heating coil is arranged centrally within its subspace.

Die Heizwendel wird bei dem bekannten Infrarotstrahler mit hohem Kraftaufwand in das Zwillingsrohr eingeführt, wobei die Abstandshalter an den Innenwandungen der jeweiligen Teilräume anliegen. Die Heizwendel wird dabei stark mechanisch belastet. Nach ihrer Montage ist sie nicht spannungsfrei, so daß die Gefahr besteht, daß sie während des Betriebes buckelig wird oder sich ihre Länge - und damit die Länge der Heizzone - ändert. Dies führt bei den bekannten Infrarotstrahlern zu Ausfällen.In the known infrared heater, the heating coil is inserted into the twin tube with a high level of force, the spacers abutting the inner walls of the respective subspaces. The heating coil is subjected to strong mechanical loads. After installation, it is not de-energized, so there is a risk that it will become humped during operation or that its length - and thus the length of the heating zone - will change. This leads to failures in the known infrared radiators.

Beim Aufheizen der Wolfram-Heizwendel während ihres Betriebes kommt es zu einer Rekristallisation des Werkstoffes, mit der eine Änderung der Wendel-Abmessungen einhergeht. Bei dem bekannten Infrarotstrahler ist es daher erforderlich, die Heizwendel bereits vor der Montage zu rekristallisieren. Dadurch wird die Heizwendel jedoch spröde, was ihren Einbau in das Zwillingsrohr zusätzlich erschwert. Darüberhinaus ist auch die Rekristallisation der Heizwendel mit hohem Zeit- und Kostenaufwand verbunden.When the tungsten heating coil is heated up during its operation, the material recrystallizes, which is accompanied by a change in the coil dimensions. In the known infrared heater, it is therefore necessary to have the heating coil before Recrystallize assembly. However, this makes the heating coil brittle, which further complicates its installation in the twin tube. In addition, the recrystallization of the heating coil is associated with a high expenditure of time and money.

Aus dem deutschen Gebrauchsmuster DE-U1 91 15 621 ist ein Zwillingsrohr-Strahler bekannt, bei dem die beiden Heizwendeln mittels eines Molybdänbügels miteinander verbunden sind, wobei der Molybdänbügel dabei in die jeweiligen stirnseitigen Enden der Heizwendeln eingreift. Zur Erleichterung der Montage des Molybdänbügels wird vorgeschlagen, den Innensteg des Zwillingsrohres durch Fräsen oder Bohren von der Stirnseite aus ein Stück zu entfernen. In den so erzeugten Schlitz wird der Molybdänbügel eingelegt und anschließend wird die Stirnseite des Zwillingsrohres zusammengequetscht. Das bekannte Verfahren erfordert die Bearbeitung des Zwillingsrohres und die Montage des Molybdänbügels von der offenen Stirnseite aus. Um das Einführen des Molybdänbügels in die Heizwendel-Stirnseiten zu erleichtern, ist der Molybdänbügel leicht verformbar. Dies führt beim Einsatz des Strahlers jedoch zu Lageänderungen der Heizwendeln.From the German utility model DE-U1 91 15 621 a twin tube radiator is known in which the two heating coils are connected to one another by means of a molybdenum bracket, the molybdenum bracket engaging in the respective ends of the heating coils. In order to facilitate the assembly of the molybdenum bracket, it is proposed to remove the inner web of the twin tube from the end face by milling or drilling. The molybdenum bracket is inserted into the slot created in this way and then the face of the twin tube is squeezed together. The known method requires the processing of the twin tube and the assembly of the molybdenum bracket from the open face. In order to facilitate the insertion of the molybdenum bracket into the end faces of the heating coil, the molybdenum bracket is easily deformable. However, this leads to changes in the position of the heating coils when the heater is used.

Ein weiterer kurzwelliger Infrarot-Strahler in Form eines Zwillingsrohres ist in dem deutschen Gebrauchsmuster DE-U1 89 13 683 beschrieben. Bei dem bekannten Zwillingsrohr-Infrarot-Strahler wird durch stirnseitiges Zuammenschmelzen zweier Einzelstrahler ein Infrarotstrahler doppelter Länge erzeugt, wobei die Einzelstrahler unabhängig voneinander schaltbar und durch eine Trennwand voneinander getrennt sind. In jedem Einzelstrahler erfolgt die Verbindung der Heizwendeln jeweils mittels eines Bügels. Die Montage des Bügles erfolgt entsprechen dem Molybdänbügel gemäß der DE-U1 91 15 621.Another short-wave infrared radiator in the form of a twin tube is described in the German utility model DE-U1 89 13 683. In the known twin-tube infrared radiator, an infrared radiator of double length is produced by melting together two individual radiators at the end, the individual radiators being switchable independently of one another and being separated from one another by a partition. The heating coils are connected in each individual heater by means of a bracket. The bracket is installed in accordance with the molybdenum bracket according to DE-U1 91 15 621.

Der Erfindung liegt daher die Aufgabe zugrunde, einen betriebssicheren Infrarotstrahler anzugeben. Weiterhin liegt der Erfindung die Aufgabe zugrunde, ein Verfahren zur Herstellung eines Strahlers anzugeben, das die Montage der Heizwendel vereinfacht.The invention is therefore based on the object of specifying a reliable infrared radiator. Furthermore, the invention is based on the object of specifying a method for producing a radiator which simplifies the assembly of the heating coil.

Ausgehend von dem eingangs genannten Infrarotstrahler wird diese Aufgabe hinsichtlich des Infrarotstrahlers erfindungsgemäß dadurch gelöst, daß der Innensteg im Bereich des oberen Endes der Heizwendel oder oberhalb davon eine Durchgangsbohrung aufweist, durch die hindurch sich ein Verbindungskörper von einem Teilraum in den anderen Teilraum erstreckt, mittels dem die erste Heizwendel mit dem Anschlußdraht oder mit der zweiten Heizwendel elektrisch verbunden ist, wobei mindestens die erste Heizwendel unter Zugspannung stehend in den Teilraum montiert ist.Starting from the infrared radiator mentioned at the outset, this object is achieved with respect to the infrared radiator according to the invention in that the inner web has a through hole in the region of the upper end of the heating coil or above it, through which a connecting body extends from one sub-space into the other sub-space, by means of which the first heating coil is electrically connected to the connecting wire or to the second heating coil, at least the first heating coil being mounted in the partial space while under tension.

Unabhängig von der Art ihrer Herstellung wird unter einer Durchgangsbohrung des Innensteges jede Öffnung des Innensteges verstanden, die sich im Bereich des zweiten, oberen Endes der Heizwendel oder, in Richtung der Längsachse des Zwillingsrohres gesehen, oberhalb davon, befindet, und die durch eine seitliche, von außen nach innen erzeugte Öffnung des Zwillingsrohres in diesem Bereich hergestellt werden kann.Regardless of the type of manufacture, a through hole in the inner web is understood to mean any opening in the inner web that is located in the region of the second, upper end of the heating coil or, viewed in the direction of the longitudinal axis of the twin tube, above it, and which is provided by a lateral, opening of the twin tube generated from the outside in can be produced in this area.

Der sich durch die Durchgangsbohrung erstreckende Verbindungskörper ist mit dem oberen Ende der Heizwendel elektrisch verbunden. Die Heizwendel kann unmittelbar an dem Verbindungskörper angreifen. Es können aber auch ein oder mehrere Verbindungsstücke zwischen dem Verbindungskörper und dem Ende der Heizwendel vorgesehen sein. Beide Varianten werden nachfolgend als "Verbindung" mit dem Verbindungskörper bezeichnet. Der Verbindungskörper verbindet somit die oberen Enden der ersten Heizwendel und der zweiten, im benachbarten Teilraum angeordneten Heizwendel bzw. eines dort angeordneten Anschlußdrahtes elektrisch miteinander. Der Einfachheit halber wird im folgenden nur die Ausführungsvariante mit einem "Heizwendelpaar" erläutert. Die Ausführungen gelten für die Ausführungsvariante der mit einem Anschlußdraht verbundenen Heizwendel sowie für das weiter unten erläuterte Verfahren zur Herstellung eines Infrarotstrahlers entsprechend.The connecting body extending through the through hole is electrically connected to the upper end of the heating coil. The heating coil can attack directly on the connecting body. However, one or more connecting pieces can also be provided between the connecting body and the end of the heating coil. Both variants are referred to below as "connection" with the connection body. The connecting body thus electrically connects the upper ends of the first heating coil and the second heating coil arranged in the adjacent sub-space or a connecting wire arranged there. For the sake of simplicity, only the embodiment variant with a "heating coil pair" is explained below. The statements apply accordingly to the variant of the heating coil connected to a connecting wire and to the method for producing an infrared radiator explained below.

Da der Verbindungskörper im Bereich der oberen Heizwendel-Enden angeordnet ist, ist eine Rückleitung, wie bei dem Infrarotstrahler nach dem Stand der Technik, nicht erforderlich. Bei dem erfindungsgemäßen Infrarotstrahler müssen lediglich die jeweiligen oberen Enden der Heizwendel bzw. der Heizwendel und des Anschlußdrahtes mit dem Verbindungskörper so verbunden werden, daß eine feste elektrische Verbindung entsteht. Bei dem erfindungsgemäßen Infrarotstrahler kann der Verbindungskörper besonders einfach durch eine Öffnung in der Seitenwand des Zwillingsrohres in die Durchgangsbohrung eingebracht werden. Hierfür ist es weder erforderlich, das Zwillingsrohr zu zerschneiden, den Verbindungskörper einzusetzen und anschließend wieder zu verschmelzen, noch den Innensteg vor der Herstellung einer Quetschung auszubohren oder auszufräsen. Dadurch wird die Montage der Heizwendel wesentlich erleichtert und das Zwillingsrohr weist keine umlaufende Naht auf.Since the connecting body is arranged in the region of the upper ends of the heating coil, a return line, as in the infrared radiator according to the prior art, is not necessary. In the infrared radiator according to the invention, only the respective upper ends of the heating coil or heating coil and the connecting wire have to be connected to the connecting body in such a way that a fixed electrical connection is produced. In the infrared radiator according to the invention, the connecting body can be introduced into the through hole particularly simply through an opening in the side wall of the twin tube. It is neither necessary to cut the twin pipe, insert the connecting body and then melt it again, nor to drill or mill out the inner web before producing a pinch. This considerably simplifies the assembly of the heating coil and the twin tube has no all-round seam.

Das obere Ende der Heizwendel kann durch die Verbindung mit dem Verbindungskörper geometrisch fixiert werden. Eine Veränderung der Länge der Heizwendel wird dadurch vermieden und die Einhaltung vorgegebener Heizzonen-Abmessungen erleichtert. Dies trägt zur Betriebssicherheit des erfindungsgemäßen Infrarotstrahlers bei.The upper end of the heating coil can be fixed geometrically by the connection with the connecting body. This avoids changing the length of the heating coil and makes it easier to comply with the specified heating zone dimensions. This contributes to the operational safety of the infrared radiator according to the invention.

Der Heizwendel wird bei der Montage eine Zugspannung aufgeprägt. Dies wird durch die Fixierung des oberen Endes der Heizwendel durch den Verbindungskörper ermöglicht. Die Vorspannung der Heizwendel kann so eingestellt werden, daß deren beim Betrieb des Infrarotstrahlers auftretende Längenänderung kompensiert und dadurch Verwerfungen der Heizwendel verhindert werden. Auch dadurch wird die Betriebssicherheit des erfindungsgemäßen Infrarotstrahlers erhöht. Aufgrund der geometrischen Fixierung der Wendel ist auch eine Rekristallisation des Heizwendel-Werkstoffes, üblicherweise Wolfram, vor der Montage bei diesem Infrarotstrahler nicht erforderlich. Dadurch wird der Einbau der Heizwendel weiterhin wesentlich erleichtert.A tension is applied to the heating coil during assembly. This is made possible by the fixing of the upper end of the heating coil by the connecting body. The The pre-tension of the heating coil can be adjusted so that the change in length that occurs during operation of the infrared radiator is compensated for and the warping of the heating coil is thereby prevented. This also increases the operational safety of the infrared radiator according to the invention. Due to the geometrical fixation of the filament, recrystallization of the heating filament material, usually tungsten, is not necessary before assembly with this infrared radiator. This will make installation of the heating coil considerably easier.

Die erste Heizwendel kann sich auch nur über einen ersten Abschnitt des ersten Teilraumes erstrecken. In dem Fall kann die zweite Heizwendel im ersten und/oder im zweiten Abschnitt des zweiten Teilraumes angeordnet sein.The first heating coil can also extend only over a first section of the first subspace. In this case, the second heating coil can be arranged in the first and / or in the second section of the second subspace.

In einer bevorzugten Ausführungsform des erfindungsgemäßen Infrarotstrahlers ist der Verbindungskörper als metallischer, biegesteifer Stift ausgebildet. Der Stift kann beispielsweise aus Molybdän bestehen. Üblicherweise erstreckt er sich quer durch beide Teilräume durch die Durchgangsbohrung des Innensteges von der Innenwandung des ersten Teilraumes bis zur Innenwandung des zweiten Teilraumes. Besonders bei einer Ausführungsform des erfindungsgemäßen Infrarotstrahlers, bei der das Zwillingsrohr im Bereich des Verbindungskörpers mit einer Quetschung verschlossen ist, erlaubt es der stiftförmige Verbindungskörper, die unbeheizten Zonen zwischen zwei stoßweise aneinandergrenzenden Strahlern besonders kurz zu halten. Denn die Quetschung kann direkt am Stift ansetzen. Der Stift läßt sich über ein Loch in der Seitenwand des Zwilligsrohres leicht in die Durchgangsbohrung einsetzen. Das Loch in der Seitenwand des Zwillingsrohres und die Durchgangsbohrung können in einem Arbeitsgang gefertigt werden. Dadurch, daß der Stift biegesteif ausgebildet ist, wird eine Lageänderung der Heizwendel vermieden.In a preferred embodiment of the infrared radiator according to the invention, the connecting body is designed as a metallic, rigid pin. The pin can be made of molybdenum, for example. It usually extends across both sub-spaces through the through hole in the inner web from the inner wall of the first sub-space to the inner wall of the second sub-space. Particularly in one embodiment of the infrared radiator according to the invention, in which the twin tube is closed with a pinch in the area of the connecting body, the pin-shaped connecting body makes it possible to keep the unheated zones between two radially adjacent radiators particularly short. Because the pinch can start directly at the pen. The pin can be easily inserted into the through hole through a hole in the side wall of the twin tube. The hole in the side wall of the twin tube and the through hole can be made in one operation. Because the pin is rigid, a change in the position of the heating coil is avoided.

Besonders bewährt hat es sich, ein Ende der Heizwendel oder ein mit diesem Ende verbundenes Halteelement in Form einer am Verbindungskörper angreifenden Öse ausgebildet ist. In die Öffnung der Öse kann der Verbindungskörper bei der Montage leicht eingefädelt werden. Als Halteelemente für die Heizwendel kommen beispielsweise sogenannte Stützwendeln in Frage. Das der Heizwendel zugewandte Ende der Stützwendel hat einen etwas kleineren Durchmesser als die Heizwendel und ragt in diese teilweise hinein.It has proven particularly useful to design one end of the heating coil or a holding element connected to this end in the form of an eyelet engaging the connecting body. The connector body can be easily threaded into the opening of the eyelet during assembly. So-called support coils, for example, are suitable as holding elements for the heating coils. The end of the support coil facing the heating coil has a somewhat smaller diameter than the heating coil and partially projects into it.

In einer alternativen bevorzugten Ausführungsform des erfindungsgemäßen Infrarotstrahlers ist ein Ende der Heizwendel oder ein mit diesem Ende verbundenes Halteelement in Form eines am Verbindungskörper angreifenden Hakens ausgebildet. Der Haken kann mit dem Verbindungskörper bei der Montage leicht verbunden werden. Um eine sichere elektrische Verbindnung zu gewährleisten, kann der Haken auch in Form einer Halbschale ausgebildet sein, die das Verbindungselement umgreift.In an alternative preferred embodiment of the infrared radiator according to the invention, one end of the heating coil or a holding element connected to this end is designed in the form of a hook engaging the connecting body. The hook can be easily connected to the connecting body during assembly. To a safe electrical To ensure connection, the hook can also be designed in the form of a half-shell, which engages around the connecting element.

Besonders bewährt hat sich eine Ausführungsform des erfindungsgemäßen Infrarotstrahlers, bei der das Zwillingsrohr über seine Länge in zwei Strahler-Abschnitte unterteilt ist, und in mindestens einem der Teilräume jedes Strahler-Abschnittes eine Heizwendel vorgesehen ist. Die einzelnen Strahler-Abschnitte können getrennt voneinander beheizbar sein. Die Heizwendeln der beiden Strahler-Abschnitte können aber auch in Reihe geschaltet sein, wobei in diesem Fall die elektrische Verbidnung der in unterschiedlichen Strahler-Abschnitten angeordneten Heizwendel mittels eines einzigen Verbindungskörpers erfolgen kann.An embodiment of the infrared radiator according to the invention has proven particularly useful, in which the twin tube is divided over its length into two radiator sections, and a heating coil is provided in at least one of the subspaces of each radiator section. The individual radiator sections can be heated separately from one another. The heating coils of the two heater sections can, however, also be connected in series, in which case the heating coil arranged in different heater sections can be electrically connected by means of a single connecting body.

Vorteilhafterweise ist jedoch in jedem der Strahler-Abschnitte der Innensteg mit einer Durchgangsbohrung versehen, wobei beide Durchgangsbohrungen zwischen den Heizwendeln angeordnet sind. Für die elektrische Verbindung der in den jeweiligen Strahler-Abschnitten angeordneten Heizwendeln ist ein M-förmiges Verbindungsteil, wie im Stand der Technik beschrieben, nicht erforderlich. Daher ist besonders die Montage eines solchen Infrarotstrahlers, bei dem die einzelnen Strahler-Abschnitte auch getrennt voneinander geschaltet werden können, vergleichsweise einfach. Die beiden Verbindungsteile werden über Löcher der Seitenwand des Zwillingsrohres durch die Durchgangsbohrungen eingeführt. Diese Löcher werden anschließend verschlossen. Abgesehen davon kann das Zwillingsrohr vollkommen nahtlos ausgebildet sein.However, the inner web is advantageously provided with a through hole in each of the radiator sections, both through holes being arranged between the heating coils. An M-shaped connecting part as described in the prior art is not required for the electrical connection of the heating coils arranged in the respective radiator sections. The assembly of such an infrared radiator, in which the individual radiator sections can also be switched separately from one another, is therefore particularly simple. The two connecting parts are inserted through holes in the side wall of the twin tube through the through holes. These holes are then closed. Apart from that, the twin tube can be completely seamless.

In einer weiteren bevorzugten Ausführungsform des erfindungsgemäßen Infrarotstrahlers sind in jedem der Strahlerabschnitte zwei Heizwendeln angeordnet.In a further preferred embodiment of the infrared radiator according to the invention, two heating coils are arranged in each of the radiator sections.

Hinsichtlich des Verfahrens wird die oben angegebene Aufgabe ausgehend von dem eingangs genannten Verfahren erfindungsgemäß dadurch gelöst, daß im Bereich des oberen Endes der Heizwendel oder oberhalb davon die Zylindermantelfläche des Zwillingsrohres und der Innensteg durchbohrt wird, daß in die Durchgangsbohrung ein Verbindungskörper eingesetzt wird, der sich von einem Teilraum in den anderen Teilraum erstreckt, daß der Verbindungskörper einerseits mit der ersten Heizwendel und andererseits mit dem Anschlußdraht oder mit der zweiten Heizwendel elektrisch verbunden wird, und daß die Bohrung der Zylindermantelfläche des Zwillingsrohres verschlossen wird.With regard to the method, the above-mentioned object is achieved, based on the method mentioned at the outset, in that the cylinder jacket surface of the twin tube and the inner web are pierced in the area of the upper end of the heating coil or above it, that a connecting body is inserted into the through hole, which is extends from one compartment into the other compartment, that the connecting body is electrically connected on the one hand to the first heating coil and on the other hand to the connecting wire or to the second heating coil, and that the bore of the cylindrical surface of the twin tube is closed.

Die Bohrung in der Zylindermantelfläche des Zwillingsrohres wird im wesentlichen radial von außen nach innen erzeugt, wobei gleichzeitig der Innensteg mit der Durchgangsbohrung versehen wird. Die Bohrung kann beispielsweise durch Bohren, Schneiden, Fräsen, Schleifen oder Schmelzen erzeugt werden. Durch die Bohrung wird von außen der Verbindungskörper eingeführt. Dies erleichtert die Montage der Heizwendel beträchtlich. Denn für die Herstellung der Verbindung von Heizwendel und Verbindungskörper sind die Maßnahmen der bekannten, wie sie eingangs beschrieben sind, nicht erforderlich. Das Zwillingsrohr weist darüberhinaus keine umlaufende Naht auf.The bore in the cylindrical surface of the twin tube is produced essentially radially from the outside inwards, the inner web being provided with the through bore at the same time. The drilling can be done, for example, by drilling, cutting, milling, grinding or melting. The connecting body is inserted through the bore from the outside. This considerably simplifies the assembly of the heating coil. Because the measures of the known, as described in the introduction, are not necessary for the production of the connection of the heating coil and the connecting body. The twin tube also has no circumferential seam.

Da der Verbindungskörper im Bereich der oberen Heizwendel-Enden eingesetzt wird, ist eine Rückleitung, wie bei dem Infrarotstrahler nach dem Stand der Technik, nicht erforderlich. Es werden lediglich die jeweiligen oberen Enden der Heizwendeln bzw. der Heizwendel und des Anschlußdrahtes mit dem Verbindungskörper so verbunden, daß eine feste elektrische Verbindung entsteht.Since the connecting body is used in the area of the upper ends of the heating coil, a return line, as in the infrared radiator according to the prior art, is not necessary. Only the respective upper ends of the heating coils or the heating coil and the connecting wire are connected to the connecting body in such a way that a fixed electrical connection is produced.

Durch die Verbindung mit dem Verbindungskörper wird das obere Ende der Heizwendel geometrisch fixiert. Eine Veränderung der Länge der Heizwendel wird dadurch vermieden und die Einhaltung vorgegebener Heizzonen-Abmessungen erleichtert. Dies trägt zur Betriebssicherheit des erfindungsgemäßen Infrarotstrahlers bei.The upper end of the heating coil is geometrically fixed by the connection with the connecting body. This avoids changing the length of the heating coil and makes it easier to comply with the specified heating zone dimensions. This contributes to the operational safety of the infrared radiator according to the invention.

Weiterhin erübrigt sich bei dem erfindungsgemäßen Verfahren wegen der geometrischen Fixierung der Wendel auch eine Rekristallisation des Heizwendel-Werkstoffes vor der Montage. Die Versprödung durch das Rekristallisieren der Heizwendel wird so vermieden, wodurch der Einbau der Heizwendel weiterhin wesentlich erleichtert wird.Furthermore, in the method according to the invention, because of the geometrical fixation of the filament, there is also no need to recrystallize the heating filament material before assembly. Embrittlement due to recrystallization of the heating coil is thus avoided, which further facilitates the installation of the heating coil.

Außerdem ermöglicht die Fixierung es, der Heizwendel bei der Montage eine Zugspannung aufzuprägen. Die Vorspannung der Heizwendel kann so eingestellt werden, daß eine während des Betriebes auftretende Längenänderung kompensiert und dadurch Verwerfungen der Heizwendel verhindert werden. Auch dadurch wird die Betriebssicherheit des erfindungsgemäßen Infrarotstrahlers erhöht.The fixation also enables the heating coil to be subjected to tensile stress during assembly. The pre-tensioning of the heating coil can be adjusted so that a change in length occurring during operation is compensated and warpage of the heating coil is thereby prevented. This also increases the operational safety of the infrared radiator according to the invention.

Vorteilhafterweise wird als Verbindungskörper ein metallischer, biegesteifer Stift eingesetzt. Hinsichtlich der Anordnung und Ausbildung eines solchen Stiftes wird auf die obigen Ausführungen verwiesen. In einer ersten bevorzugten Verfahrensweise zur Verbindung von Stift und Heizwendel wird der Stift in eine Öse eingeführt wird, die mit der Heizwendel verbunden ist. Alternativ dazu hat es sich auch bewährt, den Stift an einem Haken zu befestigen, mit dem die Heizwendel verbunden ist. Zur Sicherstellung einer festen mechanischen und elektrischen Verbindung kann der Verbindungskörper mit der Öse oder mit dem Haken auch verschweißt werden. Dies kann bei Zwillingsrohren aus Quarzglas beispielsweise von außerhalb, mittels geeigneter Laserstrahlung erfolgen. Werden die Heizwendel unter Zugspannung montiert, wird allein dadurch eine ausreichend stabile elektrische Verbindung erzeugt, so daß diese Maßnahme nur in besonderen Fällen erforderlich ist. Insbesondere beim Einsatz von nicht rekristallisierter Heizwendeln, die während ihres Einsatzes wegen Rekristallisation sogar noch schrumpfen, gewährleistet die Zufspannung eine ausreichend feste Verbindung.A metallic, rigid pin is advantageously used as the connecting body. With regard to the arrangement and design of such a pin, reference is made to the above statements. In a first preferred procedure for connecting the pin and the heating coil, the pin is inserted into an eyelet which is connected to the heating coil. Alternatively, it has also proven useful to attach the pin to a hook to which the heating coil is connected. To ensure a firm mechanical and electrical connection, the connecting body can also be welded to the eyelet or the hook. In the case of twin tubes made of quartz glass, this can be done from the outside, for example, by means of suitable laser radiation. If the heating coil is mounted under tension, this alone produces a sufficiently stable electrical connection so that this measure is only necessary in special cases. Especially when using non-recrystallized heating coils, which even shrink due to recrystallization during use, the tension ensures a sufficiently firm connection.

Als besonders vorteilhaft hat es sich erwiesen, die Heizwendel beim Verbinden mit dem Verbindungskörper unter Zugspannung zu halten. Dies gilt sowohl für die erste, als auch - gegebenenfalls - für die zweite Heizwendel. Dadurch wird der Heizwendel eine Zugspannung aufgeprägt, die eine Verwerfung der Heizwendel während des Betriebes verhindern kann. Weitere Vorteile hiervon sind oben näher erläutert. Dies gilt sowohl für die erste, als auch - gegebenenfalls - für die zweite Heizwendel.It has proven to be particularly advantageous to keep the heating coil under tension when connecting to the connecting body. This applies to both the first and - if necessary - the second heating coil. As a result, tensile stress is applied to the heating coil, which can prevent the heating coil from warping during operation. Further advantages of this are explained in more detail above. This applies to both the first and - if necessary - the second heating coil.

Ausführungsbeispiele der Erfindung sind in der Patentzeichnung dargestellt und werden nachfolgend näher erläutert. In der Patentzeichnung zeigen im einzelnen in schematischer Darstellung.

Figur 1a
eine erste Ausführungsform eines erfindungsgemäßen kurzwelligen Infrarotstrahler in einer Draufsicht,
Figur 1b
einen Schnitt durch den in Figur 1 dargestellten Infrarotstrahler entlang der Linie I-I in einer Ansicht in Richtung des Richtungspfeiles C,
Figur 2
eine weitere Ausführungsform eines erfindungsgemäßen kurzwelligen Infrarotstrahlers mit zwei Strahler-Abschnitten in einer Draufsicht,
Figur 3
eine weitere Ausführungsform eines erfindungsgemäßen kurzwelligen Infrarotstrahlers mit zwei Strahler-Abschnitten in einer Draufsicht und
Figur 4
eine weitere Ausführungsform eines erfindungsgemäßen kurzwelligen Infrarotstrahlers mit zwei Strahler-Abschnitten in einer Draufsicht.
Exemplary embodiments of the invention are shown in the patent drawing and are explained in more detail below. In the patent drawing show in detail in a schematic representation.
Figure 1a
a first embodiment of a short-wave infrared radiator according to the invention in a plan view,
Figure 1b
2 shows a section through the infrared radiator shown in FIG. 1 along the line II in a view in the direction of the arrow C,
Figure 2
a further embodiment of a short-wave infrared radiator according to the invention with two radiator sections in a plan view,
Figure 3
a further embodiment of a short-wave infrared radiator according to the invention with two radiator sections in a plan view and
Figure 4
a further embodiment of a short-wave infrared radiator according to the invention with two radiator sections in a plan view.

In Figur 1 ist ein kurzwelliger Infrarotstrahler 1 dargestellt, bei dem in einem Zwillingsrohr 2 aus Quarzglas mittels eines Innensteges 3 zwei rohrförmige Teilräume 4, 5 ausgebildet sind. In den Teilräumen 4, 5 ist jeweils eine Heizwendel 6, 7 aus Wolframdraht angeordnet, die mittels Stützscheiben 8 zentrisch innerhalb der Teilräume 4, 5 gehalten wird. Hierzu sind die Stützscheiben 8 über die Länge der Heizwendeln 6, 7 in einem Abstand von ca. 15 mm gleichmäßig verteilt angeordnet.A short-wave infrared radiator 1 is shown in FIG. 1 , in which two tubular partial spaces 4, 5 are formed in a twin tube 2 made of quartz glass by means of an inner web 3. A heating coil 6, 7 made of tungsten wire is arranged in each of the subspaces 4, 5 and is held centrally within the subspaces 4, 5 by means of support disks 8. For this purpose, the support disks 8 are evenly distributed over the length of the heating coils 6, 7 at a distance of approximately 15 mm.

Die freien, unteren Enden 9, 10 der Heizwendeln 6, 7 sind mit Stützwendeln 11, 12, und diese jeweils mit einer durch eine Quetschung 13 des Strahlerendes abgedichteten Stromdurchführung 14, 15 verbunden. Auch das gegenüberliegende Ende des Strahlers 1 ist mittels einer Quetschung 16 verschlossen.The free, lower ends 9, 10 of the heating coils 6, 7 are connected to supporting coils 11, 12, and these are each connected to a current lead-through 14, 15 sealed by a pinch 13 of the radiator end. The opposite end of the radiator 1 is also closed by means of a pinch 16.

Die Heizwendeln 6, 7 sind in Reihe geschaltet. Hierzu sind sie mit ihren oberen Enden 17, 18 elektrisch miteinander verbunden. Die elektrische Verbindung erfolgt jeweils mittels an den oberen Enden 17, 18 der Heizwendeln 6, 7 angreifenden Stützwendeln 19, 20, die mit einem gemeinsamen Kontaktstift 23 verbunden sind. Das am Kontaktstift 23 angreifende Ende jeder Stützwendel 17, 18 ist in Form einer Öse 21, 22 ausgebildet. Der Kontaktstift 23 hat einen Durchmesser von ca. 1,5 mm und eine Länge von ca. 2,8 mm. Aufgrund seiner Dicke weist der Kontaktstift 23 über diese Länge eine ausreichend hohe Biegesteifigkeit auf. Er erstreckt durch eine Durchgangsbohrung 24 des Innensteges 3 über beide Teilräume 4, 5 und über fast den gesamten Querschnitt des Zwillingsrohres 1. Die Durchgangsbohrung 24 ist ca. 1 cm oberhalb der Heizwendeln 6, 7 angeordnet.The heating coils 6, 7 are connected in series. For this purpose, their upper ends 17, 18 are electrically connected to one another. The electrical connection is made in each case by means of support coils 19, 20 which engage the upper ends 17, 18 of the heating coils 6, 7 and which are connected to a common contact pin 23. The end of each support helix 17, 18 engaging the contact pin 23 is designed in the form of an eyelet 21, 22. The contact pin 23 has a diameter of approximately 1.5 mm and a length of approximately 2.8 mm. Because of its thickness, the contact pin 23 has a sufficiently high bending stiffness over this length. It extends through a through bore 24 of the inner web 3 over both subspaces 4, 5 and over almost the entire cross section of the twin tube 1. The through bore 24 is arranged about 1 cm above the heating coils 6, 7.

Nachfolgend wird das erfindungsgemäße Verfahren zur Herstellung des erfindungsgemäßen Strahlers anhand eines Ausführungsbeispiels näher erläutert.The method according to the invention for producing the radiator according to the invention is explained in more detail below using an exemplary embodiment.

In das Zwillingsrohr 2 wird seitlich ein Loch mit einem Durchmesser im Bereich von 1,5 bis 2 mm gebohrt (in den Figuren 1a und 1b ist das Loch mit einem Quarzglaspropfen 26 abgedichtet dargestellt). In einem Arbeitsgang wird das Loch in die seitliche Begrenzungswand des Zwillingsrohres 2 und die Durchgangsbohrung 24 gebohrt. Im Ausführungsbeispiel wurden die Bohrungen mittels eines Ultraschallbohrers erzeugt. Ein Ausfräsen des Innensteges, wie bei den bekannten Montageverfahren, oder ein Abschneiden des Zwillingsrohres zum Einbringen des Kontaktstiftes werden bei diesem Montageverfahren vermieden. Das Zwillingsrohr 1 weist im Bereich der Durchgangsbohrung 24 daher keine umlaufende Naht auf.A hole with a diameter in the range of 1.5 to 2 mm is drilled into the side of the twin tube 2 (the hole is shown sealed with a quartz glass plug 26 in FIGS. 1a and 1b). The hole is drilled in the lateral boundary wall of the twin tube 2 and the through hole 24 in one operation. In the exemplary embodiment, the bores were produced using an ultrasound drill. Milling out the inner web, as in the known assembly methods, or cutting off the twin tube for inserting the contact pin are avoided in this assembly method. The twin tube 1 therefore has no circumferential seam in the area of the through bore 24.

Die Heizwendeln 6, 7 inklusive der Stützwendeln 19, 20 werden in die Teilräume 4, 5 eingeführt. Sobald die Ösen 21, 22 in der Projektion unterhalb des Loches (Quarzglaspfropfen 26) und der Durchgangsbohrung 24 liegen, wird der Kontaktstift 23 von außen durch die Ösen 21, 22 gefädelt. Anschließend werden die Heizwendeln 6, 7 mittels einer Spannvorrichtung vorgespannt und der Strahler 1 mittels der Quetschungen 13 und 16 verschlossen.The heating coils 6, 7 including the support coils 19, 20 are introduced into the subspaces 4, 5. As soon as the eyelets 21, 22 in the projection lie below the hole (quartz glass plug 26) and the through hole 24, the contact pin 23 is threaded through the eyelets 21, 22 from the outside. The heating coils 6, 7 are then pretensioned by means of a tensioning device and the radiator 1 is closed by means of the bruises 13 and 16.

Das Loch wird danach mittels des Quarzglaspfropfens 26 abgedichtet. Ansonsten sind an dem Zwillingsrohr keinerlei glasbläserische Arbeiten erforderlich. Die Montage der Heizwendlen 6, 7 ist vergleichsweise einfach. Da beide Enden 9, 10 bzw. 17, 18 der Heizwendeln 6 örtlich fixiert sind, ist eine Rekristallisation der Heizwendeln 6, 7 vor ihrer Montage nicht erforderlich. Weiterhin wird dadurch der Einbau der Heizwendeln 6, 7 unter mechanischer Vorspannung ermöglicht.The hole is then sealed using the quartz glass plug 26. Otherwise, no glass blowing work is required on the twin tube. The assembly of the heating coils 6, 7 is comparatively simple. Since both ends 9, 10 and 17, 18 of the heating coils 6 are fixed locally are, a recrystallization of the heating coils 6, 7 is not required before their assembly. Furthermore, the installation of the heating coils 6, 7 under mechanical prestress is made possible.

Aus Figur 1b ist die geometrische Anordnung des Kontaktstiftes 23 innerhalb der Teilräume 4, 5 des Zwillingsrohres 2 ersichtlich. Die Teilräume 4, 5 haben einen in etwa ovalen Querschnitt. Der Kontaktstift 23 erstreckt sich über beide Teilräume von der einen Außenwand des Zwillingsrohres 2 bis zur gegenüberliegenden Außenwand. Mittels der Durchgangsbohrung 24 wird der Kontaktstift 23 teilweise geführt. Das Loch in der seitlichen Außenwandung des Zwillingsrohres 2 ist mittels des Quarzglaspfropfens 26 verschlossen. An dem Kontaktstift 23 greift das ösenförmig ausgebildete Ende 22 einer mit der Heizwendel verbundenen Stützwendel an.The geometric arrangement of the contact pin 23 within the subspaces 4, 5 of the twin tube 2 can be seen from FIG. 1b . The subspaces 4, 5 have an approximately oval cross section. The contact pin 23 extends over both subspaces from the one outer wall of the twin tube 2 to the opposite outer wall. The contact pin 23 is partially guided by means of the through hole 24. The hole in the lateral outer wall of the twin tube 2 is closed by means of the quartz glass plug 26. The eye-shaped end 22 of a support coil connected to the heating coil engages on the contact pin 23.

In den nachfolgend näher erläuterten Figuren 2 und 3 werden die gleichen Bezugsziffern verwendet wie in Figur 1, wenn die damit bezeichneten Bauteile oder Bestandteile des Infrarotstrahlers gleich oder äquivalent zu denjenigen Bauteilen oder Bestandteilen sind, wie sie anhand der Figur 1 für die gleichen Bezugsziffern bereits erläutert worden sind.In FIGS. 2 and 3, which are explained in more detail below, the same reference numerals are used as in FIG. 1 if the components or components of the infrared radiator designated therewith are the same or equivalent to those components or components as have already been explained with reference to FIG. 1 for the same reference numerals have been.

Der kurzwellige Infrarotstrahler 31 gemäß Figur 2 unterscheidet sich von dem in Figur 1a und Figur 1b dargestellten Infrarotstrahler 1 im wesentlichen dadurch, daß er über seine Länge zusätzlich in zwei Strahler-Abschnitte 38, 39 unterteilt ist, in denen paarweise die Heizwendeln 6a, 7a bzw. 6b, 7b in Reihe geschaltet sind. Die einzelnen Abschnitte 38, 39, die getrennt voneinander schaltbar sind, sind im wesentlichen spiegelsymmetrisch zueinander ausgebildet, wobei die Spiegelebene senkrecht zur Blattebene durch die gestrichelt eingezeichnete Linie A verläuft. Die Gesamtlänge des Infrarotstrahler 31 beträgt ca. 80 cm. Der Übersichtlichkeit halber ist er gebrochen dargestellt.The short-wave infrared radiator 31 according to FIG. 2 differs from the infrared radiator 1 shown in FIGS. 1a and 1b essentially in that it is further divided over its length into two radiator sections 38, 39, in which the heating coils 6a, 7a and 6b, 7b are connected in series. The individual sections 38, 39, which can be switched separately from one another, are essentially mirror-symmetrical to one another, the mirror plane running perpendicular to the sheet plane through the dashed line A. The total length of the infrared radiator 31 is approximately 80 cm. For the sake of clarity, it is shown broken.

Der Infrarotstrahler 31 umfaßt ein nahtloses Zwillingsrohr 32, das beidseitig durch Quetschungen 13 verschlossen ist, in denen Stromdurchführungen 14, 15 für die Heizwendeln 6a, 7a bzw. 6b, 7b eingeschmolzen sind. Das Zwillingsrohr 32 wird durch einen Innensteg 3 in zwei räumlich voneinander geteilte Teilräume 4, 5 unterteilt.The infrared radiator 31 comprises a seamless twin tube 32, which is closed on both sides by crushing 13, in which current feedthroughs 14, 15 for the heating coils 6a, 7a and 6b, 7b are melted. The twin tube 32 is divided by an inner web 3 into two spatially divided subspaces 4, 5.

Die paarweise in Reihe geschalteten Heizwendeln 6a, 7a bzw. 6b, 7b sind auch bei dieser Ausführungsform des Infrarotstrahlers 31 jeweils mittels eines Kontaktstiftes 23 elektrisch miteinander verbunden. Es sind hier also zwei Kontaktstifte 23 vorgesehen. Diese sind über die Länge des Infrarotstrahlers 31 gesehen etwa in dessen Mitte und zwischen den Heizwendel-Paaren 6a, 7a bzw. 6b, 7b angeordnet. Der Innensteg 3 ist hier demnach mit zwei parallel zueinander verlaufenden Durchgangsbohrungen 24 versehen, durch die sich jeweils einer der Kontaktstifte 23 erstreckt. Durchgangsbohrung 24 und Kontaktstift 23 sind entsprechend wie bei dem in Figur 1a und Figur 1b dargestellten Infrarotstrahler 1 ausgebildet.The heating coils 6a, 7a or 6b, 7b connected in pairs in series are also electrically connected to one another in this embodiment of the infrared radiator 31 by means of a contact pin 23. Two contact pins 23 are therefore provided here. Seen over the length of the infrared radiator 31, these are arranged approximately in the middle thereof and between the heating coil pairs 6a, 7a and 6b, 7b. The inner web 3 is accordingly provided with two through bores 24 running parallel to one another, through each of which one of the Contact pins 23 extends. Through hole 24 and contact pin 23 are formed correspondingly as in the infrared radiator 1 shown in Figure 1a and 1b.

Die Montage des in Figur 2 schematisch dargestellten kurzwelligen Infrarotstrahlers ist im Vergleich zu dem aus dem Stand der Technik bekannten, ebenfalls zwei Strahler-Abschnitte aufweisenden Infrarotstrahler besonders einfach. M-förmige Kontaktbügel, wie sie bisher verwendet worden sind, sind bei dem erfindungsgemäßen Infrarotstrahler 31 nicht erforderlich.The assembly of the short-wave infrared radiator shown schematically in FIG. 2 is particularly simple in comparison to the infrared radiator known from the prior art, which also has two radiator sections. M-shaped contact brackets, such as have been used so far, are not required in the infrared radiator 31 according to the invention.

Bei dem Infrarotstrahler 31 werden von beiden Stirnseiten des Zwillingsrohres 32 die jeweiligen Heizwendel-Paare 6a, 7a bzw. 6b, 7b eingeführt und über jeweils den Kontaktstift 23 miteinander verbunden. Dabei ist das jeweilige obere, mit dem Kontaktstift 23 verbundene Ende der Heizwendeln 6a, 7a, 6b, 7b mit den Bezugsziffern 17, 18, ihr jeweils unteres, mit dem elektrischen Anschluß verbundene Ende mit den Bezugsziffern 9, 10 gekennzeichnet. Beide seitlichen Öffnungen des Zwillingsrohres 32 werden jeweils mittels eines Glaspfropfens 26 verschlossen. Ansonsten entspricht die Montage des Infrarotstrahlers 31 derjenigen, wie sie oben anhand des in Figur 1 dargestellten Infrarotstrahlers 1 bereits erläutert worden ist.In the infrared radiator 31, the respective heating coil pairs 6a, 7a and 6b, 7b are inserted from both ends of the twin tube 32 and connected to each other via the contact pin 23. The respective upper end of the heating coils 6a, 7a, 6b, 7b, which is connected to the contact pin 23, is identified by the reference numbers 17, 18, and its lower end, which is connected to the electrical connection, is identified by the reference numbers 9, 10. Both lateral openings of the twin tube 32 are each closed by means of a glass plug 26. Otherwise, the assembly of the infrared radiator 31 corresponds to that as has already been explained above with reference to the infrared radiator 1 shown in FIG. 1.

Bei dem in Figur 3 dargestellten kurzwelligen Infrarotstrahler 51 ist das Zwillingsrohr 52, entsprechend der in Figur 2 dargestellten Ausführungsform, ebenfalls in zwei Strahler-Abschnitte 38, 39 sowie durch einen Innensteg 3 in zwei rohrförmige Teilräume 4, 5 mit ovalem Querschnitt unterteilt. Diese Ausführungsform unterscheidet sich von dem in Figur 2 dargestellten Infrarotstrahler 31 im wesentlichen dadurch, daß in jedem der zwei Teilräume 4, 5 nur eine einzige Heizwendel 6b, 7a vorgesehen ist, wobei sich die beiden Heizwendeln 6b, 7a in ihren jeweiligen Strahler-Abschnitten 4 bzw. 5 versetzt gegenüberliegen. Anstelle mit einer zweiten Heizwendel (wie in Figur 2) ist bei dieser Ausführungsform jede Heizwendel 6b bzw. 7a mit einem im anderen Teilraum 43 bzw. 42 angeordneten Anschlußdraht 55 bzw. 56 elektrisch verbunden. Im übrigen entspricht diese Ausführungsform hinsichtlich der elektrischen Verbindung 22, 23, 24, 26 und der Montage des Infrarotstrahlers 51 derjenigen gemäß Figur 2.In the short-wave infrared radiator 51 shown in FIG. 3 , the twin tube 52, in accordance with the embodiment shown in FIG. 2, is likewise divided into two radiator sections 38, 39 and by an inner web 3 into two tubular partial spaces 4, 5 with an oval cross section. This embodiment differs from the infrared radiator 31 shown in FIG. 2 essentially in that only one heating coil 6b, 7a is provided in each of the two subspaces 4, 5, the two heating coils 6b, 7a being different in their respective radiator sections 4 or 5 are offset. Instead of a second heating coil (as in FIG. 2), in this embodiment each heating coil 6b or 7a is electrically connected to a connecting wire 55 or 56 arranged in the other subspace 43 or 42. Otherwise, this embodiment corresponds to that according to FIG. 2 with regard to the electrical connection 22, 23, 24, 26 and the mounting of the infrared radiator 51.

Bei dem kurzwelligen Infrarotstrahler 61 gemäß Figur 4 ist das Zwillingsrohr 62, entsprechend der in Figur 2 dargestellten Ausführungsform, ebenfalls in zwei Strahler-Abschnitte 38, 39, sowie durch einen Innensteg 3 in zwei rohrförmige Teilräume 4, 5 mit ovalem Querschnitt unterteilt. Ebenso wie bei der in Figur 3 dargestellten Ausführungsform ist auch bei diesem Infrarotstrahler 61 in jedem der zwei Teilräume 4, 5 nur eine einzige Heizwendel 6b, 7a vorgesehen, wobei sich die beiden Heizwendeln 6b, 7a in ihren jeweiligen Strahler-Abschnitten 38 bzw. 39 versetzt gegenüberliegen.In the short-wave infrared radiator 61 according to FIG. 4 , the twin tube 62, in accordance with the embodiment shown in FIG. 2, is also divided into two radiator sections 38, 39, and by an inner web 3 into two tubular partial spaces 4, 5 with an oval cross section. As in the embodiment shown in FIG. 3, only one heating coil 6b, 7a is provided in this infrared radiator 61 in each of the two subspaces 4, 5, the two heating coils 6b, 7a being located in their respective radiator sections 38 and 39 are offset.

Die in Figur 4 dargestellte Ausführungsform des erfindungsgemäßen Infrarotstrahlers 61 unterscheidet sich von dem in Figur 3 dargestellten Infrarotstrahler 31 im wesentlichen dadurch, daß die beiden Heizwendeln 6b, 7a über einen zwischen ihnen angeordneten Kontaktstift 23 elektrisch miteinander verbunden sind.The embodiment of the infrared radiator 61 according to the invention shown in FIG. 4 differs from the infrared radiator 31 shown in FIG. 3 essentially in that the two heating coils 6b, 7a are electrically connected to one another via a contact pin 23 arranged between them.

Bei der Montage des Infrarotstrahlers 61 wird von den beiden offenen Stirnseiten des Zwillingsrohres 62 her jeweils eine der Heizwendeln 6b bzw. 7a in den jeweiligen Teilraum 4 bzw. 5 eingeführt und, wie weiter oben anhand der Darstellung von Figur 1 bereits erläutert, mit dem Kontaktstift 23 elektrisch und mechanisch verbunden. Für diese Verbindung sind die dem Kontaktstift 23 zugewandten oberen Enden 17 bzw. 18 der Heizwendeln 6b bzw. 7a mit halbschalenförmig ausgebildeten Haken 66 verbunden, die den Kontaktstift 23 teilweise umschließen. Der Kontaktstift 23 erstreckt sich über beide Teilräume 4, 5 des Infrarotstrahlers 61 durch eine Bohrung 24 im Innensteg 3. Das Einsetzen des Kontaktstiftes 23 sowie die Montage des Infrarotstrahlers 61 erfolgt im übrigen entsprechend der anhand der vorangehenden Ausführungsbeispiele erläuterten Verfahrensweisen.When the infrared radiator 61 is installed, one of the heating coils 6b and 7a is inserted into the respective subspace 4 and 5 from the two open end faces of the twin tube 62 and, as already explained above with reference to the illustration in FIG. 1, with the contact pin 23 electrically and mechanically connected. For this connection, the upper ends 17 and 18 of the heating coils 6b and 7a facing the contact pin 23 are connected to half-shell-shaped hooks 66, which partially surround the contact pin 23. The contact pin 23 extends over both subspaces 4, 5 of the infrared radiator 61 through a bore 24 in the inner web 3. The insertion of the contact pin 23 and the assembly of the infrared radiator 61 are otherwise carried out according to the procedures explained with the aid of the preceding exemplary embodiments.

Claims (13)

Infrarotstrahler, mit einem Zwillingsrohr, das einen Innensteg aufweist, der zwei in Rohr-Längsrichtung verlaufende Teilräume voneinander trennt, und mit einer im ersten der Teilräume angeordneten ersten Heizwendel, die mit ihrem ersten, unteren Ende mit einer durch eine Stirnseite des Zwillingsrohres nach außen geführten Stromzuführung versehen ist, und die mit ihrem zweiten, oberen Ende mit einem im zweiten Teilraum angeordneten Anschlußdraht oder mit einer im zweiten Teilraum angeordneten zweiten Heizwendel elektrisch verbunden ist, dadurch gekennzeichnet, daß der Innensteg (3) im Bereich des oberen Endes (17, 18) der Heizwendel (6; 6a; 6b) oder oberhalb davon eine Durchgangsbohrung (24) aufweist, durch die hindurch sich ein Verbindungskörper (23) von einem Teilraum (4) in den anderen Teilraum (5) erstreckt, mittels dem die erste Heizwendel (6; 6a; 6b) mit dem Anschlußdraht (55; 56) oder mit der zweiten Heizwendel (7; 7a; 7b) elektrisch verbunden ist, wobei mindestens die erste Heizwendel (6; 6a; 6b) unter Zugspannung stehend in den Teilraum (4) montiert wird.Infrared radiator, with a twin tube that has an inner web that separates two partial spaces running in the longitudinal direction of the tube from one another, and with a first heating coil arranged in the first of the partial spaces, which has a first, lower end with a lead through an end face of the twin tube to the outside Power supply is provided, and which is electrically connected with its second, upper end to a connecting wire arranged in the second partial space or to a second heating coil arranged in the second partial space, characterized in that the inner web (3) in the region of the upper end (17, 18th ) the heating coil (6; 6a; 6b) or above it has a through hole (24) through which a connecting body (23) extends from one part space (4) into the other part space (5), by means of which the first heating coil ( 6; 6a; 6b) with the connecting wire (55; 56) or with the second heating coil (7; 7a; 7b) is electrically connected, at least the first heating coil (6; 6a; 6b) is mounted under tension in the subspace (4). Infrarotstrahler nach Anspruch 1, dadurch gekennzeichnet, daß der Verbindungskörper ein metallischer, biegesteifer Stift (23) ist.Infrared radiator according to claim 1, characterized in that the connecting body is a metallic, rigid pin (23). Infrarotstrahler nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß ein Ende (17; 18) der Heizwendel (6; 6a; 6b; 7; 7a; 7b) oder ein mit diesem Ende (17; 18) verbundenes Halteelement (19; 20) in Form einer am Verbindungskörper (23) angreifenden Öse (22) ausgebildet ist.Infrared radiator according to Claim 1 or 2, characterized in that one end (17; 18) of the heating coil (6; 6a; 6b; 7; 7a; 7b) or a holding element (19; 20) connected to this end (17; 18) is designed in the form of an eyelet (22) engaging on the connecting body (23). Infrarotstrahler nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß ein Ende (17; 18) der Heizwendel (6; 6a; 6b; 7; 7a; 7b) oder ein mit diesem Ende (17; 18) verbundenes Halteelement (19; 20) in Form einer am Verbindungskörper (23) angreifendenen Hakens (66) ausgebildet ist.Infrared radiator according to claim 1 or 2, characterized in that one end (17; 18) of the heating coil (6; 6a; 6b; 7; 7a; 7b) or one connected to this end (17; 18) Holding element (19; 20) is designed in the form of a hook (66) engaging on the connecting body (23). Infrarotstrahler nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die zweite Heizwendel (7; 7a; 7b) bzw. der Anschlußdraht (55; 56) unter Zugspannung stehend in den Teilraum (5) montiert wird.Infrared radiator according to one of the preceding claims, characterized in that the second heating coil (7; 7a; 7b) or the connecting wire (55; 56) is mounted in the partial space (5) while under tension. Infrarotstrahler nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Zwillingsrohr (2; 32; 52; 62) über seine Länge in zwei Strahler-Abschnitte (38; 39) unterteilt ist, und in mindestens einem der Teilräume (4; 5) jedes Strahler-Abschnittes (38; 39) eine Heizwendel (6a; 7a; 6b; 7b) vorgesehen ist.Infrared radiator according to one of the preceding claims, characterized in that the twin tube (2; 32; 52; 62) is divided over its length into two radiator sections (38; 39) and in at least one of the subspaces (4; 5) each A heater coil (6a; 7a; 6b; 7b) is provided for the radiator section (38; 39). Infrarotstrahler nach Anspruch 6, dadurch gekennzeichnet, daß in jedem der Strahler-Abschnitte (38; 39) der Innensteg (3) mit einer Durchgangsbohrung (24) versehen ist, wobei beide Durchgangsbohrungen (24) zwischen den Heizwendeln (6a; 7a; 6b; 7b) angeordnet sind.Infrared radiator according to claim 6, characterized in that in each of the radiator sections (38; 39) the inner web (3) is provided with a through-hole (24), both through-holes (24) between the heating coils (6a; 7a; 6b; 7b) are arranged. Infrarotstrahler nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß in jedem der Strahlerabschnitte (38, 39) zwei Heizwendeln (6a; 7a; 6b; 7b) angeordnet sind.Infrared radiator according to claim 6 or 7, characterized in that two heating coils (6a; 7a; 6b; 7b) are arranged in each of the radiator sections (38, 39). Verfahren zur Herstellung eines Infrarotstrahlers, durch ■ Bereitstellen eines Zwillingsrohres, das einen Innensteg aufweist, der zwei in Rohr-Längsrichtung verlaufende Teilräume voneinander trennt, ■ Einbringen einer ersten Heizwendel in den ersten Teilraum, ■ Einbringen eines Anschlußdrahtes oder einer zweiten Heizwendel in den zweiten Teilraum, ■ Verbinden des ersten, unteren Endes der ersten Heizwendel mit einer durch eine Stirnseite des Zwillingsrohres nach außen geführten Stromzuführung, ■ Verbinden des zweiten, oberen Endes der ersten Heizwendel mit dem im zweiten Teilraum angeordneten Anschlußdraht oder mit der im zweiten Teilraum angeordneten zweiten Heizwendel,
dadurch gekennzeichnet, ■ daß im Bereich des oberen Endes (17, 18) der Heizwendel (6; 6a; 6b) oder oberhalb davon die Zylindermantelfläche des Zwillingsrohres (2; 32; 52; 62) und der Innensteg (3) durchbohrt wird, ■ daß in die Durchgangsbohrung (24) ein Verbindungskörper (23) eingesetzt wird, der sich von einem Teilraum (4) in den anderen Teilraum (5) erstreckt, ■ daß der Verbindungskörper (23) einerseits mit der ersten Heizwendel (6; 6a; 6b) und andererseits mit dem Anschlußdraht (55; 56) oder mit der zweiten Heizwendel (7; 7a; 7b) elektrisch verbunden wird, und ■ daß die Bohrung der Zylindermantelfläche des Zwillingsrohres (2; 32; 52; 62) verschlossen wird. Process for the production of an infrared radiator, by Provision of a twin tube which has an inner web which separates two subspaces running in the longitudinal direction of the tube, Introducing a first heating coil into the first subspace, Introducing a connecting wire or a second heating coil into the second subspace, Connecting the first, lower end of the first heating coil to a power supply led through an end face of the twin tube, Connecting the second, upper end of the first heating coil to the connecting wire arranged in the second subspace or to the second heating coil arranged in the second subspace,
characterized, ■ that in the area of the upper end (17, 18) of the heating coil (6; 6a; 6b) or above it the cylinder jacket surface of the twin tube (2; 32; 52; 62) and the inner web (3) are pierced, ■ that a connecting body (23) is inserted into the through hole (24), which extends from one subspace (4) into the other subspace (5), ■ that the connecting body (23) is electrically connected on the one hand to the first heating coil (6; 6a; 6b) and on the other hand to the connecting wire (55; 56) or to the second heating coil (7; 7a; 7b), and ■ that the bore of the cylindrical surface of the twin tube (2; 32; 52; 62) is closed. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß als Verbindungskörper ein metallischer, biegesteifer Stift (23) eingesetzt wird.Method according to claim 9, characterized in that a metallic, rigid pin (23) is used as the connecting body. Verfahren nach Anspruch 10, dadurch gekennzeichnet, daß der Stift (23) in eine Öse (22) eingeführt wird, die mit der Heizwendel (6; 6a; 6b; 7; 7a; 7b) verbunden ist.Method according to claim 10, characterized in that the pin (23) is inserted into an eyelet (22) which is connected to the heating coil (6; 6a; 6b; 7; 7a; 7b). Verfahren nach Anspruch 10, dadurch gekennzeichnet, daß der Stift (23) an einem Haken (66) befestigt wird, mit dem die Heizwendel (6; 6a; 6b; 7; 7a; 7b) verbunden ist.A method according to claim 10, characterized in that the pin (23) is attached to a hook (66) to which the heating coil (6; 6a; 6b; 7; 7a; 7b) is connected. Verfahren nach einem der Ansprüche 9 bis 12, dadurch gekennzeichnet, daß die Heizwendel (6; 6a; 6b; 7; 7a; 7b) beim Verbinden mit dem Verbindungskörper (23) unter Zugspannung gehalten wird.Method according to one of claims 9 to 12, characterized in that the heating coil (6; 6a; 6b; 7; 7a; 7b) is held under tension when connected to the connecting body (23).
EP97109108A 1996-06-05 1997-06-05 Infrared radiator and its manufacturing procedure Expired - Lifetime EP0812003B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19622466 1996-06-05
DE19622466 1996-06-05

Publications (3)

Publication Number Publication Date
EP0812003A2 true EP0812003A2 (en) 1997-12-10
EP0812003A3 EP0812003A3 (en) 1999-05-12
EP0812003B1 EP0812003B1 (en) 2003-07-30

Family

ID=7796148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97109108A Expired - Lifetime EP0812003B1 (en) 1996-06-05 1997-06-05 Infrared radiator and its manufacturing procedure

Country Status (5)

Country Link
US (1) US5867630A (en)
EP (1) EP0812003B1 (en)
JP (1) JPH1055876A (en)
AT (1) ATE246398T1 (en)
DE (2) DE19722215A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101546692B (en) * 2008-03-27 2012-06-27 优志旺电机株式会社 Filament lamp

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6167196A (en) * 1997-01-10 2000-12-26 The W. B. Marvin Manufacturing Company Radiant electric heating appliance
US6163849A (en) 1997-05-13 2000-12-19 Micron Electronics, Inc. Method of powering up or powering down a server to a maintenance state
DE10041564C2 (en) * 2000-08-24 2002-06-27 Heraeus Noblelight Gmbh Coolable infrared radiator element
DE102011115841A1 (en) * 2010-11-19 2012-05-24 Heraeus Noblelight Gmbh irradiator
DE102010064141A1 (en) * 2010-12-23 2012-06-28 Von Ardenne Anlagentechnik Gmbh Heating device for substrate processing system, has power connector for making electrical contact of heating wire, which is arranged at terminal end of heater pipe, where terminal end of heater pipe fastens heater pipe with sealing unit
US20140374403A1 (en) * 2011-09-02 2014-12-25 Bromic Healing Pty Ltd. Electric heater
CN104179311A (en) * 2014-09-10 2014-12-03 太仓派欧技术咨询服务有限公司 Heating wall
CN105702560A (en) * 2016-01-13 2016-06-22 北京机电工程研究所 Quartz lamp used for multiple-temperature-zone structure thermal test and manufacturing method thereof
GB2560033A (en) * 2017-02-28 2018-08-29 Rolls Royce Plc Apparatus and methods for providing thermal energy to an article

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0153776A1 (en) * 1984-02-14 1985-09-04 Koninklijke Philips Electronics N.V. Mains voltage incandescent lamp
DE3441723A1 (en) * 1984-11-15 1986-05-22 Westfälische Metall Industrie KG Hueck & Co, 4780 Lippstadt Electrical contact part
US4605877A (en) * 1985-02-14 1986-08-12 General Electric Company Mounting structure for multi-filaments of an incandescent lamp
DE8913683U1 (en) * 1989-11-20 1990-01-11 Heraeus Quarzschmelze Gmbh, 6450 Hanau Infrared heaters
DE9113022U1 (en) * 1991-10-19 1992-01-16 Heraeus Quarzglas GmbH, 6450 Hanau Shortwave infrared emitter
DE9115621U1 (en) * 1991-12-17 1992-02-27 Heraeus Quarzglas GmbH, 6450 Hanau Infrared heaters
JPH08152795A (en) * 1994-11-30 1996-06-11 Toshiba Lighting & Technol Corp Fixing heater and device and image forming device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0153776A1 (en) * 1984-02-14 1985-09-04 Koninklijke Philips Electronics N.V. Mains voltage incandescent lamp
DE3441723A1 (en) * 1984-11-15 1986-05-22 Westfälische Metall Industrie KG Hueck & Co, 4780 Lippstadt Electrical contact part
US4605877A (en) * 1985-02-14 1986-08-12 General Electric Company Mounting structure for multi-filaments of an incandescent lamp
DE8913683U1 (en) * 1989-11-20 1990-01-11 Heraeus Quarzschmelze Gmbh, 6450 Hanau Infrared heaters
DE9113022U1 (en) * 1991-10-19 1992-01-16 Heraeus Quarzglas GmbH, 6450 Hanau Shortwave infrared emitter
DE9115621U1 (en) * 1991-12-17 1992-02-27 Heraeus Quarzglas GmbH, 6450 Hanau Infrared heaters
JPH08152795A (en) * 1994-11-30 1996-06-11 Toshiba Lighting & Technol Corp Fixing heater and device and image forming device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 096, no. 010, 31. Oktober 1996 & JP 08 152795 A (TOSHIBA LIGHTING &TECHNOL CORP; TOSHIBA AVE CORP), 11. Juni 1996 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101546692B (en) * 2008-03-27 2012-06-27 优志旺电机株式会社 Filament lamp

Also Published As

Publication number Publication date
EP0812003A3 (en) 1999-05-12
DE59710492D1 (en) 2003-09-04
JPH1055876A (en) 1998-02-24
ATE246398T1 (en) 2003-08-15
US5867630A (en) 1999-02-02
DE19722215A1 (en) 1997-12-11
EP0812003B1 (en) 2003-07-30

Similar Documents

Publication Publication Date Title
DE2639419C2 (en) Artificial intraocular lens and method of making
DE60127567T2 (en) MOUNTING CLIPS AND ISOLATORS FOR USE IN ELECTRIC HEATERS AND ELECTRIC HEATERS THEREWITH
EP0812003B1 (en) Infrared radiator and its manufacturing procedure
EP0491979A1 (en) Pacemaker catheter with two poles
EP3894771B1 (en) Shielding for a high-temperature furnace
DE102019127691A1 (en) Electric heating element, electric heating device and method for producing an electric heating device with such a heating element
EP3840910B1 (en) Method for welding conductor pieces in a component of an electromechanical transducer, and component of an electromechanical transducer comprising welded conductor pieces
DE102015003020B3 (en) bar screen basket
EP1107646A1 (en) Heating element for smelt crucibles and arrangement of heating elements
EP0381976B1 (en) Heating element
DE2449225C3 (en) Evaporation crucible for vacuum evaporation systems
DE10350157B3 (en) Punching device for joining hollow profiles at opposite-lying sides has a holding unit having an E-profile consisting of a first C-profile and a second C-profile
DE19803605B4 (en) Process for manufacturing electrical fuses
DE102017107861B4 (en) Twist-beam and vehicle
DE3227623C1 (en) Connecting device for a radiant heating element, which is preferably insulated by pearls, especially for baking-oven heating
EP2052399B8 (en) Method for the production and insertion of an electrode frame comprising a lamp coil into a discharge vessel of a discharge lamp
EP1492199A1 (en) Fastening device and screw connector with such a fastening device
DE477186C (en) Electrode structure for glow cathode tubes
EP3871300B1 (en) Electrode for producing a corona effect
EP0563448B1 (en) Radiation element
EP0560063A1 (en) Low-pressure discharge lamp
EP1593469B1 (en) Heated cutter with a ceramic support
DE10102670B4 (en) Light unit with a number of light bulbs
WO2015173178A2 (en) Gas generator of an airbag module, comprising a filter element
EP1703776A1 (en) Device for heating having a foldable heating element and method of making the same

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19970624

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE

AKX Designation fees paid

Free format text: AT BE CH DE ES FR GB IT LI NL SE

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH DE ES FR GB IT LI NL SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: KELLER & PARTNER PATENTANWAELTE AG

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 59710492

Country of ref document: DE

Date of ref document: 20030904

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031030

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031110

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20031023

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040605

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040630

26N No opposition filed

Effective date: 20040504

BERE Be: lapsed

Owner name: *HERAEUS NOBLELIGHT G.M.B.H.

Effective date: 20040630

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20080613

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20080624

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20080618

Year of fee payment: 12

Ref country code: DE

Payment date: 20080620

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20080613

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20080620

Year of fee payment: 12

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20090605

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20100101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100226

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090630

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090630

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090605

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090605