EP1191573A1 - Light bulb with a short-cicuit prevention device - Google Patents
Light bulb with a short-cicuit prevention device Download PDFInfo
- Publication number
- EP1191573A1 EP1191573A1 EP01203529A EP01203529A EP1191573A1 EP 1191573 A1 EP1191573 A1 EP 1191573A1 EP 01203529 A EP01203529 A EP 01203529A EP 01203529 A EP01203529 A EP 01203529A EP 1191573 A1 EP1191573 A1 EP 1191573A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filament
- bulb
- hooks
- base
- revolution
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/18—Mountings or supports for the incandescent body
Definitions
- the present invention relates to a bulb including a base to which a filament, intended to emit light radiation, having windings arranged spiraling around an axis of revolution.
- Such a bulb is sold by the applicant under the reference PL10044067.
- the filament is held in position by means of a single metal support, one end of which is secured to the base and the other end of which has a closed hook surrounding one of the windings of the filament, the two ends of the support being connected by a rod.
- the known bulb is configured so that, when the bulb is in its normal operating conditions, the support rod is located below the filament.
- the Applicant has observed that the filament, when it is traversed by a current, tends to deform mechanically by developing a curvature moving down the ends of the filament on either side of the hook holding said filament in position.
- several windings can come into contact with the support rod, thus creating a short circuit which can be destructive for the support and the filament itself.
- the object of the present invention is to prevent any risk of short circuit linked to a deformation of the filament, by proposing a bulb in which the extent of the deformation of the filament is limited.
- a bulb in accordance with the introductory paragraph includes furthermore a plurality of supports, each having one end connected to the base and another end provided with a hook in contact with one of the filament windings.
- the multiplicity of supports provided by the invention allows better maintenance in position of the filament and prevents the simultaneous contacting of several of its windings with the same support.
- the hooks are all located in a same side of the axis of revolution of the filament.
- Such an embodiment simplifies the manufacture of the supports, which can be thus constituted by a single rod provided with a plurality of hooks.
- the realization of the connection between the supports and the base will also be simplified.
- the supports are intended to be located above the filament when the bulb is in its normal operating conditions, the hooks of the supports being open hooks.
- one end of the filament being integral with the base, the other end of the filament is connected to said base via a frame formed by a rod located outside a plane defined by the axis of revolution and points of contact between the hooks and the filament.
- This embodiment of the frame ensures that it is outside of a trajectory that would follow, under the effect of the mechanical deformation observed for the known bulb, the filament windings if these were not kept in position. A such a choice therefore prevents any risk of short circuit between the filament and the armature.
- FIG. 1 schematically represents a known bulb in a configuration corresponding to its normal operating conditions.
- This bulb includes an SO plug and a TUB tube made of a transparent material, for example glass.
- This tube encloses a FIL filament, intended to emit light radiation, having windings arranged in a spiral around an axis of revolution AX.
- One end of this FIL filament is linked to a BA base, the other end being connected to said base via an ARM armature, materialized by a metal rod placed above the FIL filament.
- the FIL filament and the ARM armature thus form a current circuit connected to the SO plug.
- the FIL filament is held in position by means of a single metal support SUP, one end of which is integral with the base BA and the other end of which has a closed hook CH surrounding one of the windings of the FIL filament. , the two ends of the SUP support being connected by a rod arranged below the FIL filament.
- SUP single metal support
- the FIL filament when it is traversed by a current, tends to deform mechanically by developing a curvature moving down the ends of the FIL filament on either side of the hook holding said filament in position. .
- several windings can come into contact with the rod of the SUP support, then creating a short-circuit which can be destructive for the SUP support and the FIL filament itself.
- FIG. 2 schematically represents a bulb according to a preferred embodiment of the invention, in a configuration corresponding to its normal operating conditions.
- the filament FIL is held in position by means of three hooks H1, H2, H3, connected to the base BA via a rod.
- the invention allows better retention of the FIL filament in position and prevents it from deforming down around the median hook H2.
- the hooks H1, H2, H3 are all located above the filament FIL, which makes it possible to use only one rod to connect said hooks to the base BA, and decreases still the risks of short-circuit linked to a possible deformation of the FIL filament, such a deformation taking place downwards.
- the hooks H1, H2 and H3 are here open hooks, which considerably simplifies the manufacture of the bulb, since the filament can be placed on said hooks when it should be screwed into closed hooks.
- the ARM armature consists of a rod located outside a plane defined by the axis of revolution AX and contact points between the hooks H1, H2, H3 and the FIL filament. A possible deformation of the FIL filament can in principle only occur in the plane defined by the axis of revolution AX and said contact points, the particular positioning of the ARM armature eliminates any risk of contact between said armature and windings of the FIL filament.
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
Description
La présente invention concerne une ampoule incluant un socle auquel est lié un filament, destiné à émettre un rayonnement lumineux, présentant des enroulements disposés en spirale autour d'un axe de révolution.The present invention relates to a bulb including a base to which a filament, intended to emit light radiation, having windings arranged spiraling around an axis of revolution.
Une telle ampoule est commercialisée par la demanderesse sous la référence
PL10044067. Dans cette ampoule, le filament est maintenu en position au moyen d'un unique
support métallique, dont une extrémité est solidaire du socle et dont une autre extrémité
présente un crochet fermé entourant l'un des enroulements du filament, les deux extrémités du
support étant reliées par une tige.
L'ampoule connue est configurée de sorte que, lorsque l'ampoule est dans ses conditions de
fonctionnement normales, la tige du support est située au-dessous du filament. Or la
demanderesse a observé que le filament, lorsqu'il est parcouru par un courant, a tendance à se
déformer mécaniquement en développant une courbure déplaçant vers le bas les extrémités du
filament de part et d'autre du crochet maintenant en position ledit filament.
Ainsi, plusieurs enroulements peuvent entrer en contact avec la tige du support, créant alors un
court-circuit qui peut être destructeur pour le support et le filament lui-même.Such a bulb is sold by the applicant under the reference PL10044067. In this bulb, the filament is held in position by means of a single metal support, one end of which is secured to the base and the other end of which has a closed hook surrounding one of the windings of the filament, the two ends of the support being connected by a rod.
The known bulb is configured so that, when the bulb is in its normal operating conditions, the support rod is located below the filament. However, the Applicant has observed that the filament, when it is traversed by a current, tends to deform mechanically by developing a curvature moving down the ends of the filament on either side of the hook holding said filament in position.
Thus, several windings can come into contact with the support rod, thus creating a short circuit which can be destructive for the support and the filament itself.
La présente invention a pour but de prévenir tout risque de court-circuit lié à une déformation du filament, en proposant une ampoule dans laquelle l'ampleur de la déformation du filament est limitée.The object of the present invention is to prevent any risk of short circuit linked to a deformation of the filament, by proposing a bulb in which the extent of the deformation of the filament is limited.
En effet, selon l'invention, une ampoule conforme au paragraphe introductif inclut en outre une pluralité de supports, chacun présentant une extrémité liée au socle et une autre extrémité munie d'un crochet en contact avec l'un des enroulements du filament.Indeed, according to the invention, a bulb in accordance with the introductory paragraph includes furthermore a plurality of supports, each having one end connected to the base and another end provided with a hook in contact with one of the filament windings.
La multiplicité des supports prévue par l'invention permet un meilleur maintien en position du filament et empêche la mise en contact simultanée de plusieurs de ses enroulements avec un même support.The multiplicity of supports provided by the invention allows better maintenance in position of the filament and prevents the simultaneous contacting of several of its windings with the same support.
Dans l'un des modes de réalisation de l'invention, les crochets sont tous situés d'un même côté de l'axe de révolution du filament.In one of the embodiments of the invention, the hooks are all located in a same side of the axis of revolution of the filament.
Un tel mode de réalisation simplifie la fabrication des supports, qui peuvent être ainsi constitués par une unique tige munie d'une pluralité de crochets. La réalisation de la liaison entre les supports et le socle s'en trouvera également simplifiée.Such an embodiment simplifies the manufacture of the supports, which can be thus constituted by a single rod provided with a plurality of hooks. The realization of the connection between the supports and the base will also be simplified.
Dans un mode de réalisation particulier de l'ampoule conforme à l'invention, les supports sont destinés à être situés au-dessus du filament lorsque l'ampoule se trouve dans ses conditions normales de fonctionnement, les crochets des supports étant des crochets ouverts.In a particular embodiment of the bulb according to the invention, the supports are intended to be located above the filament when the bulb is in its normal operating conditions, the hooks of the supports being open hooks.
Le fait que les crochets soient ouverts simplifie considérablement la fabrication de l'ampoule. En effet, lorsque les crochets sont fermés, le filament doit être en quelque sorte vissé dans les ouvertures des crochets, ce qui prend un temps non-négligeable qui se répercute sur les coûts de fabrication de l'ampoule. L'utilisation de crochets ouverts nécessite simplement de poser les enroulements sur les crochets et diminue donc les coûts de fabrication de l'ampoule The fact that the hooks are open considerably simplifies the manufacture of the bulb. Indeed, when the hooks are closed, the filament must be somehow screwed into the hook openings, which takes a considerable amount of time, which has repercussions on the manufacturing costs of the bulb. The use of open hooks simply requires to put the windings on the hooks and therefore reduces the manufacturing costs of bulb
Dans un mode de réalisation préféré de l'invention, une extrémité du filament étant solidaire du socle, l'autre extrémité du filament est reliée audit socle via une armature formée par une tige située en dehors d'un plan défini par l'axe de révolution et des points de contact entre les crochets et le filament.In a preferred embodiment of the invention, one end of the filament being integral with the base, the other end of the filament is connected to said base via a frame formed by a rod located outside a plane defined by the axis of revolution and points of contact between the hooks and the filament.
Ce mode de réalisation de l'armature permet d'assurer que celle-ci se trouve en-dehors d'une trajectoire que suivraient, sous l'effet de la déformation mécanique observée pour l'ampoule connue, les enroulements du filament si ceux-ci n'étaient maintenus en position. Un tel choix prévient donc tout risque de court-circuit entre le filament et l'armature.This embodiment of the frame ensures that it is outside of a trajectory that would follow, under the effect of the mechanical deformation observed for the known bulb, the filament windings if these were not kept in position. A such a choice therefore prevents any risk of short circuit between the filament and the armature.
L'invention sera mieux comprise à l'aide de la description suivante, faite à titre d'exemple non-limitatif et en regard des dessins annexés, dans lesquels :
- la figure 1 est un schéma décrivant une ampoule connue, et
- la figure 2 est un schéma décrivant une ampoule conforme à un mode de réalisation préféré de l'invention.
- FIG. 1 is a diagram describing a known bulb, and
- Figure 2 is a diagram describing a bulb according to a preferred embodiment of the invention.
La figure 1 représente schématiquement une ampoule connue dans une
configuration correspondant à ses conditions normales de fonctionnement. Cette ampoule
comporte une fiche SO et un tube TUB réalisé en un matériau transparent, par exemple du
verre. Ce tube enferme un filament FIL, destiné à émettre un rayonnement lumineux,
présentant des enroulements disposés en spirale autour d'un axe de révolution AX. L'une des
extrémités de ce filament FIL est liée à un socle BA, l'autre extrémité étant reliée audit socle via
une armature ARM, matérialisée par une tige métallique disposée au-dessus du filament FIL. Le
filament FIL et l'armature ARM forment ainsi un circuit de courant relié à la fiche SO.
Dans l'ampoule connue, le filament FIL est maintenu en position au moyen d'un unique support
métallique SUP, dont une extrémité est solidaire du socle BA et dont une autre extrémité
présente un crochet fermé CH entourant l'un des enroulements du filament FIL, les deux
extrémités du support SUP étant reliées par une tige disposée au-dessous du filament FIL.
La demanderesse a observé que le filament FIL, lorsqu'il est parcouru par un courant, a
tendance à se déformer mécaniquement en développant une courbure déplaçant vers le bas les
extrémités du filament FIL de part et d'autre du crochet maintenant en position ledit filament.
Ainsi, plusieurs enroulements peuvent entrer en contact avec la tige du support SUP, créant
alors un court-circuit qui peut être destructeur pour le support SUP et le filament FIL lui-même.FIG. 1 schematically represents a known bulb in a configuration corresponding to its normal operating conditions. This bulb includes an SO plug and a TUB tube made of a transparent material, for example glass. This tube encloses a FIL filament, intended to emit light radiation, having windings arranged in a spiral around an axis of revolution AX. One end of this FIL filament is linked to a BA base, the other end being connected to said base via an ARM armature, materialized by a metal rod placed above the FIL filament. The FIL filament and the ARM armature thus form a current circuit connected to the SO plug.
In the known bulb, the FIL filament is held in position by means of a single metal support SUP, one end of which is integral with the base BA and the other end of which has a closed hook CH surrounding one of the windings of the FIL filament. , the two ends of the SUP support being connected by a rod arranged below the FIL filament. The Applicant has observed that the FIL filament, when it is traversed by a current, tends to deform mechanically by developing a curvature moving down the ends of the FIL filament on either side of the hook holding said filament in position. . Thus, several windings can come into contact with the rod of the SUP support, then creating a short-circuit which can be destructive for the SUP support and the FIL filament itself.
La figure 2 représente schématiquement une ampoule conforme à un mode de
réalisation préféré de l'invention, dans une configuration correspondant à ses conditions
normales de fonctionnement. Les éléments communs à l'ampoule connue y sont munis de
références identiques. Dans ce mode de réalisation de l'invention, le filament FIL est maintenu
en position au moyen de trois crochets H1, H2, H3, reliés au socle BA via une tige.
L'invention permet un meilleur maintien en position du filament FIL et empêche celui-ci de se
déformer vers le bas autour du crochet médian H2.
Dans ce mode de réalisation particulier de l'invention, les crochets H1, H2, H3 sont tous situés
au-dessus du filament FIL, ce qui permet de n'utiliser qu'une seule tige pour relier lesdits
crochets au socle BA, et diminue encore les risques de court-circuit liés à une éventuelle
déformation du filament FIL, une telle déformation se faisant vers le bas.
Par ailleurs, les crochets H1, H2 et H3 sont ici des crochets ouverts, ce qui simplifie
considérablement la fabrication de l'ampoule, puisque le filament pourra être posé sur lesdits
crochets alors qu'il devrait être vissé dans des crochets fermés.
Enfin, dans ce mode de réalisation de l'invention, l'armature ARM est constituée par une tige
située en dehors d'un plan défini par l'axe de révolution AX et des points de contact entre les
crochets H1, H2, H3 et le filament FIL. Une éventuelle déformation du filament FIL ne pouvant
en principe se produire que dans le plan défini par l'axe de révolution AX et lesdits points de
contact, le positionnement particulier de l'armature ARM élimine tout risque de contact entre
ladite armature et des enroulements du filament FIL.FIG. 2 schematically represents a bulb according to a preferred embodiment of the invention, in a configuration corresponding to its normal operating conditions. The elements common to the known bulb are provided with identical references. In this embodiment of the invention, the filament FIL is held in position by means of three hooks H1, H2, H3, connected to the base BA via a rod.
The invention allows better retention of the FIL filament in position and prevents it from deforming down around the median hook H2.
In this particular embodiment of the invention, the hooks H1, H2, H3 are all located above the filament FIL, which makes it possible to use only one rod to connect said hooks to the base BA, and decreases still the risks of short-circuit linked to a possible deformation of the FIL filament, such a deformation taking place downwards.
Furthermore, the hooks H1, H2 and H3 are here open hooks, which considerably simplifies the manufacture of the bulb, since the filament can be placed on said hooks when it should be screwed into closed hooks.
Finally, in this embodiment of the invention, the ARM armature consists of a rod located outside a plane defined by the axis of revolution AX and contact points between the hooks H1, H2, H3 and the FIL filament. A possible deformation of the FIL filament can in principle only occur in the plane defined by the axis of revolution AX and said contact points, the particular positioning of the ARM armature eliminates any risk of contact between said armature and windings of the FIL filament.
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0012166 | 2000-09-25 | ||
| FR0012166 | 2000-09-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1191573A1 true EP1191573A1 (en) | 2002-03-27 |
| EP1191573B1 EP1191573B1 (en) | 2006-07-26 |
Family
ID=8854638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01203529A Expired - Lifetime EP1191573B1 (en) | 2000-09-25 | 2001-09-18 | Light bulb with a short-cicuit prevention device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6717339B2 (en) |
| EP (1) | EP1191573B1 (en) |
| JP (1) | JP2002124215A (en) |
| CN (1) | CN100334683C (en) |
| DE (1) | DE60121693T2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7005800B2 (en) * | 2001-08-21 | 2006-02-28 | Koninklijke Philips Electronics N.V. | Lamp with anti-explosion device |
| JP2009146731A (en) * | 2007-12-14 | 2009-07-02 | Kahoku Lighting Solutions Corp | Single base halogen bulb |
| JP5765354B2 (en) * | 2013-03-13 | 2015-08-19 | 岩崎電気株式会社 | Halogen lamp |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3930177A (en) * | 1972-06-06 | 1975-12-30 | Westinghouse Electric Corp | Single-ended incandescent lamp having a simplified filament-mount |
| EP0271858A2 (en) * | 1986-12-16 | 1988-06-22 | Gte Products Corporation | High voltage hard glass halogen capsule |
| US4868451A (en) * | 1988-12-16 | 1989-09-19 | Gte Products Corporation | Lamp filament support construction |
| EP0357078A2 (en) * | 1988-08-31 | 1990-03-07 | Gte Products Corporation | Electric lamp having a coiled incandescent filament and filament movement restraint means |
| JPH03295151A (en) * | 1990-04-11 | 1991-12-26 | Matsushita Electron Corp | Incandescent lamp |
| JPH04298961A (en) * | 1991-03-27 | 1992-10-22 | Ushio Inc | Manufacture for mount assembly unit |
| JPH0536387A (en) * | 1991-07-30 | 1993-02-12 | Ushio Inc | Mount assembly of incandescent lamp and manufacture thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3903177A (en) * | 1970-01-22 | 1975-09-02 | Chevron Res | Resorcinol process |
| DE2305960A1 (en) * | 1973-02-07 | 1974-08-08 | Patra Patent Treuhand | HALOGEN LIGHT BULB |
| US4208606A (en) * | 1979-01-10 | 1980-06-17 | Westinghouse Electric Corp. | Filament-support means for a tubular incandescent lamp |
| US4384235A (en) * | 1979-05-22 | 1983-05-17 | Thorn Emi Limited | Linear filament assembly with refractory insulating support rod for halogen lamp |
| DE3166387D1 (en) * | 1980-02-06 | 1984-11-08 | Emi Plc Thorn | Incandescent filament supports |
| US4835443A (en) * | 1986-12-16 | 1989-05-30 | Gte Products Corporation | High voltage hard glass halogen capsule |
| JPH097553A (en) * | 1995-06-23 | 1997-01-10 | Toshiba Lighting & Technol Corp | Incandescent lamp and lighting device using it |
| JP3835772B2 (en) * | 1996-11-06 | 2006-10-18 | 桜井 裕美子 | Filament mounting method |
-
2001
- 2001-09-18 EP EP01203529A patent/EP1191573B1/en not_active Expired - Lifetime
- 2001-09-18 DE DE60121693T patent/DE60121693T2/en not_active Expired - Lifetime
- 2001-09-21 JP JP2001289957A patent/JP2002124215A/en not_active Withdrawn
- 2001-09-22 CN CNB011384743A patent/CN100334683C/en not_active Expired - Fee Related
- 2001-09-24 US US09/961,985 patent/US6717339B2/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3930177A (en) * | 1972-06-06 | 1975-12-30 | Westinghouse Electric Corp | Single-ended incandescent lamp having a simplified filament-mount |
| EP0271858A2 (en) * | 1986-12-16 | 1988-06-22 | Gte Products Corporation | High voltage hard glass halogen capsule |
| EP0357078A2 (en) * | 1988-08-31 | 1990-03-07 | Gte Products Corporation | Electric lamp having a coiled incandescent filament and filament movement restraint means |
| US4868451A (en) * | 1988-12-16 | 1989-09-19 | Gte Products Corporation | Lamp filament support construction |
| JPH03295151A (en) * | 1990-04-11 | 1991-12-26 | Matsushita Electron Corp | Incandescent lamp |
| JPH04298961A (en) * | 1991-03-27 | 1992-10-22 | Ushio Inc | Manufacture for mount assembly unit |
| JPH0536387A (en) * | 1991-07-30 | 1993-02-12 | Ushio Inc | Mount assembly of incandescent lamp and manufacture thereof |
Non-Patent Citations (3)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 016, no. 134 (E - 1185) 6 April 1992 (1992-04-06) * |
| PATENT ABSTRACTS OF JAPAN vol. 017, no. 121 (E - 1331) 12 March 1993 (1993-03-12) * |
| PATENT ABSTRACTS OF JAPAN vol. 017, no. 319 (E - 1383) 17 June 1993 (1993-06-17) * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1346145A (en) | 2002-04-24 |
| US20020053873A1 (en) | 2002-05-09 |
| EP1191573B1 (en) | 2006-07-26 |
| DE60121693T2 (en) | 2007-03-29 |
| CN100334683C (en) | 2007-08-29 |
| US6717339B2 (en) | 2004-04-06 |
| DE60121693D1 (en) | 2006-09-07 |
| JP2002124215A (en) | 2002-04-26 |
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