EP0707207A2 - Smoke detector - Google Patents
Smoke detector Download PDFInfo
- Publication number
- EP0707207A2 EP0707207A2 EP95113253A EP95113253A EP0707207A2 EP 0707207 A2 EP0707207 A2 EP 0707207A2 EP 95113253 A EP95113253 A EP 95113253A EP 95113253 A EP95113253 A EP 95113253A EP 0707207 A2 EP0707207 A2 EP 0707207A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- smoke detector
- smoke
- detection chamber
- circuit
- housing part
- 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
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
- G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
- G08B17/113—Constructional details
Definitions
- the invention relates to a smoke detector, in particular an optical smoke detector, which works on the principle of scattered light measurement (Tyndall effect).
- Optical smoke detectors have the advantage of responding very quickly to plastic smoldering fires, open fires and fires of liquids with smoke development.
- a light-emitting diode and a photo element are arranged in a measuring chamber in such a way that the light emitted by the light-emitting diode cannot reach the photo element directly.
- the measuring chamber is designed as a labyrinth or "optical sump" in which any intruding external light is absorbed.
- Smoke particles penetrating into the measuring chamber scatter and reflect the measuring light beam emitted by the light-emitting diode.
- the scattered or reflected light is detected by the photo element, converted into a voltage signal and evaluated in a downstream electronic circuit, which may trigger an alarm.
- the smoke detectors are subject to the usual environmental conditions such as dirt, dust, smoke, etc. Therefore, the sensitive measuring chamber in particular must be checked at regular intervals and cleaned if necessary, so that the required responsiveness is guaranteed.
- the measuring chamber has been cleaned by the manufacturer of the smoke detector. To do this, the smoke detector must be "picked” and replaced with a new one. The picked smoke alarm is then sent to the manufacturer for cleaning. This procedure is quite cumbersome and requires a considerable amount of time and money.
- a smoke detector in which a detection chamber is located in a housing and is designed as an exchangeable insert.
- the detection chamber contains a smoke sensor and an electrical adaptation circuit.
- An electronic signal processing and alarm evaluation circuit is arranged, for example, in the housing of the smoke detector.
- the detection chamber according to the invention thus has only a few cheap components. It can therefore also be designed for use as a disposable insert.
- the adaptation circuit can ensure that each detection chamber is compatible with every signal processing and alarm evaluation circuit, ie for example the signal outputs of the detection chambers and the signal inputs of the signal processing and alarm evaluation circuits meet predetermined specifications. This ensures that the required sensitivity of the smoke detector for smoke aerosols is maintained even with any exchange and assignment of the detection chamber and signal processing and alarm evaluation circuit.
- the adaptation circuit allows, in particular, the electrical and / or photoelectric tolerances of the smoke sensor and the mechanical tolerances of the optical system of the detection chamber to be compared. This comparison can advantageously be carried out in the factory. It is preferably carried out so that the output signal of the electrical matching circuit is proportional to the smoke density. The same applies to an adjustment of the signal processing and alarm evaluation circuit.
- the adaptation circuit and the signal processing and alarm evaluation circuit can advantageously be connected to one another by an interface via which signals can be transmitted.
- the interface preferably contains an electrical connector.
- the detection chamber can be exchanged particularly easily.
- the detection chamber preferably contains a light-emitting element, for example a light-emitting diode, and a light-sensitive element, for example a photo element.
- a light-emitting element for example a light-emitting diode
- a light-sensitive element for example a photo element
- the smoke detector has an upper housing part and a lower housing part.
- the signal processing and alarm evaluation circuit is preferably arranged in the lower housing part.
- the housing can be opened in a simple manner in order to check or replace the detection chamber.
- the signal processing and alarm evaluation circuit is easily accessible in this way.
- the smoke detector has an upper housing part 1, a detection chamber 2 and a lower housing part 9.
- the upper housing part 1 has an upper section into which the detection chamber 2 fits and a lower section in which the lower housing part 9 can be countersunk.
- the upper housing part 1 has a plurality of openings 10 through which smoke can enter the interior of the housing and thus the detection chamber 2.
- the detection chamber 2 is constructed in exactly the same way as in the prior art mentioned at the outset, ie it contains a light-emitting diode 4 as a light-emitting element, a photo element 5 as a light-sensitive element and a labyrinth 7 as an optical sump.
- the detection chamber 2 has a circuit board with an electrical adaptation circuit 6 on its underside. Half of an electrical connector 8 is also attached to this circuit board.
- a further circuit board with an electronic signal processing and alarm evaluation circuit 3 is attached in the lower housing part 9.
- the other half of the electrical connector 8 is fastened on this further circuit board.
- the detection chamber 2 is designed as an easily replaceable insert and for this purpose has a snap mechanism 11 and a guide sleeve 12 on its top, with the aid of which the detection chamber 2 can be hooked or centered in corresponding recesses in the upper housing part 1 in a manner known per se.
- the detection chamber 2 On its underside, the detection chamber 2 has depressions in which guide sleeves 13 of the lower housing part 9 can engage in the same way.
- the lower housing part 9 is guided by the guide sleeves 12; 13 and the detection chamber 2 can be screwed directly to the upper housing part 1.
- the lower housing part 9 together with the detection chamber 2 can therefore be removed from the upper housing part 1 after loosening the screws. If the detection chamber 2 is dirty and needs to be replaced, it is removed from the lower housing part 9. Then a new detection chamber 2 is plugged onto the lower housing part 9 and both parts are screwed to the upper housing part 1.
- other known connection techniques such as snap locks or the like, can of course also be provided.
- the light-emitting diode 4 and the photo element 5 are connected to the electrical matching circuit 6.
- the electrical matching circuit 6 and the signal processing and alarm evaluation circuit 3 are equipped with an interface 14, which preferably contains an electrical connector.
- the signal processing and alarm evaluation circuit 3 also has an alarm output and a fault output, by means of which an alarm can be triggered or a fault display can be effected.
- the signal transmission between the adaptation circuit 6 and the signal processing and alarm evaluation circuit 3 and the power supply for the light-emitting diode 4, the photo element 5 and the adaptation circuit 6 take place inductively.
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire-Detection Mechanisms (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
Die Erfindung betrifft einen Rauchmelder, insbesondere einen optischen Rauchmelder, der nach dem Prinzip der Streulichtmessung (Tyndall-Effekt) arbeitet.The invention relates to a smoke detector, in particular an optical smoke detector, which works on the principle of scattered light measurement (Tyndall effect).
Optische Rauchmelder haben den Vorteil eines sehr schnellen Ansprechens bei Kunststoffschwelbränden, offenen Bränden sowie Bränden von Flüssigkeiten mit Rauchentwicklung.Optical smoke detectors have the advantage of responding very quickly to plastic smoldering fires, open fires and fires of liquids with smoke development.
Bei einem bekannten optischen Rauchmelder sind in einer Meßkammer eine Leuchtdiode und ein Fotoelement so angeordnet, daß das von der Leuchtdiode ausgesandte Licht nicht direkt zum Fotoelement gelangen kann. Darüber hinaus ist die Meßkammer als Labyrinth oder "optischer Sumpf" ausgebildet, in dem eventuell eindringendes Fremdlicht absorbiert wird.In a known optical smoke detector, a light-emitting diode and a photo element are arranged in a measuring chamber in such a way that the light emitted by the light-emitting diode cannot reach the photo element directly. In addition, the measuring chamber is designed as a labyrinth or "optical sump" in which any intruding external light is absorbed.
In die Meßkammer eindringende Rauchpartikel streuen und reflektieren den von der Leuchtdiode ausgesandten Meßlichtstrahl. Das gestreute oder reflektierte Licht wird vom Fotoelement erfaßt, in ein Spannungssignal umgewandelt und in einer nachgeschalteten elektronischen Schaltung ausgewertet, die gegebenenfalls einen Alarm auslöst.Smoke particles penetrating into the measuring chamber scatter and reflect the measuring light beam emitted by the light-emitting diode. The scattered or reflected light is detected by the photo element, converted into a voltage signal and evaluated in a downstream electronic circuit, which may trigger an alarm.
Die Rauchmelder unterliegen im Betrieb den üblichen Umweltbedingungen wie Schmutz, Staub, Rauch usw.. Daher muß insbesondere die sensible Meßkammer turnusgemäß überprüft und gegebenenfalls gereinigt werden, damit die geforderte Ansprechempfindlichkeit gewährleistet bleibt.During operation, the smoke detectors are subject to the usual environmental conditions such as dirt, dust, smoke, etc. Therefore, the sensitive measuring chamber in particular must be checked at regular intervals and cleaned if necessary, so that the required responsiveness is guaranteed.
Bisher erfolgt die Reinigung der Meßkammer beim Hersteller des Rauchmelders. Dazu muß der Rauchmelder "gepflückt" und durch einen neuen ersetzt werden. Der gepflückte Rauchmelder wird dann an den Hersteller zur Reinigung geschickt. Diese Vorgehensweise ist recht umständlich und bedingt einen erheblichen zeitlichen und finanziellen Aufwand.So far, the measuring chamber has been cleaned by the manufacturer of the smoke detector. To do this, the smoke detector must be "picked" and replaced with a new one. The picked smoke alarm is then sent to the manufacturer for cleaning. This procedure is quite cumbersome and requires a considerable amount of time and money.
Es ist daher Aufgabe der vorliegenden Erfindung, einen Rauchmelder anzugeben, der eine einfache, schnelle und kostengünstige Wartung ermöglicht.It is therefore an object of the present invention to provide a smoke detector which enables simple, quick and inexpensive maintenance.
Die Lösung dieser Aufgabe erfolgt erfindungsgemäß durch einen Rauchmelder, bei dem sich in einem Gehäuse eine Detektionskammer befindet, die als auswechselbarer Einsatz ausgebildet ist.This object is achieved according to the invention by a smoke detector, in which a detection chamber is located in a housing and is designed as an exchangeable insert.
Dadurch wird es möglich, bei der Wartung des Rauchmelders unmittelbar vor Ort nur die verschmutzte Detektionskammer gegen eine saubere auszuwechseln.This makes it possible to replace only the dirty detection chamber with a clean one when the smoke detector is being serviced.
Bei einer bevorzugten Ausführung eines erfindungsgemäßen Rauchmelders enthält die Detektionskammer einen Rauchsensor und eine elektrische Anpassungsschaltung. Eine elektronische Signalverarbeitungs- und Alarmauswertungsschaltung ist beispielsweise im Gehäuse des Rauchmelders angeordnet.In a preferred embodiment of a smoke detector according to the invention, the detection chamber contains a smoke sensor and an electrical adaptation circuit. An electronic signal processing and alarm evaluation circuit is arranged, for example, in the housing of the smoke detector.
Somit weist die erfindungsgemäße Detektionskammer nur wenige billige Bauelemente auf. Sie kann daher auch zur Verwendung als Einwegeinsatz ausgelegt sein.The detection chamber according to the invention thus has only a few cheap components. It can therefore also be designed for use as a disposable insert.
Ferner läßt sich durch die Anpassungsschaltung sicherstellen, daß jede Detektionskammer mit jeder Signalverarbeitungs- und Alarmauswertungsschaltung kompatibel ist, d.h. beispielsweise die Signalausgänge der Detektionskammern und die Signaleingänge der Signalverarbeitungs- und Alarmauswertungsschaltungen vorbestimmte Spezifikationen erfüllen. Dadurch wird sichergestellt, daß die geforderte Ansprechempfindlichkeit des Rauchmelders bei Rauchaerosolen auch bei einem beliebigen Tausch und Zuordnung von Detektionskammer und Signalverarbeitungs- und Alarmauswertungsschaltung eingehalten wird.Furthermore, the adaptation circuit can ensure that each detection chamber is compatible with every signal processing and alarm evaluation circuit, ie for example the signal outputs of the detection chambers and the signal inputs of the signal processing and alarm evaluation circuits meet predetermined specifications. This ensures that the required sensitivity of the smoke detector for smoke aerosols is maintained even with any exchange and assignment of the detection chamber and signal processing and alarm evaluation circuit.
Durch die Anpassungsschaltung können insbesondere die elektrischen und/oder photoelektrischen Toleranzen des Rauchsensors sowie die mechanischen Toleranzen des optischen Systems der Detektionskammer abgeglichen werden. Dieser Abgleich kann vorteilhafterweise im Werk erfolgen. Er wird vorzugsweise so durchgeführt, daß das Ausgangssignal der elektrischen Anpassungsschaltung proportional zur Rauchdichte ist. Entsprechendes gilt für eine Justage der Signalverarbeitungs- und Alarmauswertungsschaltung.The adaptation circuit allows, in particular, the electrical and / or photoelectric tolerances of the smoke sensor and the mechanical tolerances of the optical system of the detection chamber to be compared. This comparison can advantageously be carried out in the factory. It is preferably carried out so that the output signal of the electrical matching circuit is proportional to the smoke density. The same applies to an adjustment of the signal processing and alarm evaluation circuit.
Die Anpassungsschaltung und die Signalverarbeitungs- und Alarmauswertungsschaltung sind vorteilhafterweise durch eine Schnittstelle miteinander verbindbar, über die Signale übertragen werden können. Vorzugsweise enthält die Schnittstelle einen elektrischen Steckverbinder.The adaptation circuit and the signal processing and alarm evaluation circuit can advantageously be connected to one another by an interface via which signals can be transmitted. The interface preferably contains an electrical connector.
Auf diese Weise läßt sich die Detektionskammer besonders einfach auswechseln.In this way, the detection chamber can be exchanged particularly easily.
Als Rauchsensor enthält die Detektionskammer vorzugsweise ein lichtemittierendes Element, beispielsweise eine Leuchtdiode, und ein lichtempfindliches Element, beispielsweise ein Fotoelement.As a smoke sensor, the detection chamber preferably contains a light-emitting element, for example a light-emitting diode, and a light-sensitive element, for example a photo element.
In einer vorteilhaften Ausführungsform weist der Rauchmelder ein Gehäuseoberteil und ein Gehäuseunterteil auf. Die Signalverarbeitungs- und Alarmauswertungsschaltung ist vorzugsweise im Gehäuseunterteil angeordnet.In an advantageous embodiment, the smoke detector has an upper housing part and a lower housing part. The signal processing and alarm evaluation circuit is preferably arranged in the lower housing part.
Bei dieser Ausführungsform kann in einfacher Weise das Gehäuse geöffnet werden, um die Detektionskammer zu überprüfen bzw. auszutauschen. Außerdem ist auf diese Weise auch die Signalverarbeitungs- und Alarmauswertungsschaltung leicht zugänglich.In this embodiment, the housing can be opened in a simple manner in order to check or replace the detection chamber. In addition, the signal processing and alarm evaluation circuit is easily accessible in this way.
Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels näher erläutert, das in den Figuren dargestellt ist. Es zeigt:
- Fig. 1
- einen zerlegten, erfindungsgemäßen Rauchmelder
- Fig. 2
- schematisch ein elektrisches Blockschaltbild für einen erfindungsgemäßen Rauchmelder.
- Fig. 1
- a disassembled smoke detector according to the invention
- Fig. 2
- schematically an electrical block diagram for a smoke detector according to the invention.
Gemäß Fig. 1 weist der Rauchmelder ein Gehäuseoberteil 1, eine Detektionskammer 2 und ein Gehäuseunterteil 9 auf. Das Gehäuseoberteil 1 weist einen oberen Abschnitt, in den die Detektionskammer 2 hineinpaßt, und einen unteren Abschnitt auf, in dem das Gehäuseunterteil 9 versenkt befestigbar ist. Im oberen Abschnitt weist das Gehäuseobertei 1 mehrere Öffnungen 10 auf, durch die Rauch ins Gehäuseinnere und somit in die Detektionskammer 2 gelangen kann.1, the smoke detector has an upper housing part 1, a
Die Detektionskammer 2 ist im Prinzip genauso aufgebaut wie beim eingangs genannten Stand der Technik, d.h. enthält eine Leuchtdiode 4 als lichtemittierendes Element, ein Fotoelement 5 als lichtempfindliches Element und ein Labyrinth 7 als optischen Sumpf. Zusätzlich weist die Detektionskammer 2 an ihrer Unterseite eine Platine mit einer elektrischen Anpassungsschaltung 6 auf. Auf dieser Platine ist auch die eine Hälfte eines elektrischen Steckverbinders 8 angebracht.In principle, the
Im Gehäuseunterteil 9 ist eine weitere Platine mit einer elektronischen Signalverarbeitungs- und Alarmauswertungsschaltung 3 angebracht. Auf dieser weiteren Platine ist die andere Hälfte des elektrischen Steckverbinders 8 befestigt.A further circuit board with an electronic signal processing and
Die Detektionskammer 2 ist als leicht auswechselbarer Einsatz ausgebildet und weist dazu an ihrer Oberseite einen Schnappmechanismus 11 sowie eine Führungshülse 12 auf, mit deren Hilfe die Detektionskammer 2 in an sich bekannter Weise in entsprechenden Vertiefungen im Gehäuseoberteil 1 einhakbar bzw. zentrierbar ist. An ihrer Unterseite weist die Detektionskammer 2 Vertiefungen auf, in die Führungshülsen 13 des Gehäuseunterteils 9 in gleicher Weise eingreifen können.The
Bei einer bevorzugten Ausführung des Rauchmelders ist das Gehäuseunterteil 9 durch die Führungshülsen 12; 13 und die Detektionskammer 2 hindurch direkt mit dem Gehäuseoberteil 1 verschraubbar. Bei der Wartung des Rauchmelders läßt sich daher nach Lösen der Schrauben das Gehäuseunterteil 9 samt Detektionskammer 2 aus dem Gehäuseoberteil 1 herausnehmen. Falls die Detektionskammer 2 verschmutzt ist und ausgewechselt werden muß, wird sie vom Gehäuseunterteil 9 abgenommen. Danach wird eine neue Detektionskammer 2 auf das Gehäuseunterteil 9 aufgesteckt und beide Teile mit dem Gehäuseoberteil 1 verschraubt. Statt der Schraubverbindung können natürlich auch andere bekannte Verbindungstechniken, wie beispielsweise Schnappverschlüsse oder dergleichen vorgesehen sein.In a preferred embodiment of the smoke detector, the
Wie in Fig. 2 schematisch dargestellt, ist die Leuchtdiode 4 und das Fotoelement 5 mit der elektrischen Anpassungsschaltung 6 verbunden. Die elektrische Anpassungsschaltung 6 und die Signalverarbeitungs- und Alarmauswertungsschaltung 3 sind mit einer Schnittstelle 14 ausgerüstet, die vorzugsweise einen elektrischen Steckverbinder enthält. Die Signalverarbeitungs- und Alarmauswertungsschaltung 3 weist ferner einen Alarmausgang und einen Störungsausgang auf, durch den ein Alarm ausgelöst bzw. eine Störungsanzeige bewirkt werden kann.As shown schematically in FIG. 2, the light-
Bei einer anderen Ausführung erfolgt die Signalübertragung zwischen der Anpassungsschaltung 6 und der Signalverarbeitungs- und Alarmauswertungsschaltung 3 sowie die Stromversorgung für die Leuchtdiode 4, das Fotoelement 5 und die Anpassungsschaltung 6 auf induktivem Weg.In another embodiment, the signal transmission between the adaptation circuit 6 and the signal processing and
Claims (8)
dadurch gekennzeichnet,
daß die Detektionskammer (2) als auswechselbarer Einsatz ausgebildet ist.Smoke detectors, in particular optical smoke detectors, with a detection chamber located in a housing,
characterized by
that the detection chamber (2) is designed as an interchangeable insert.
dadurch gekennzeichnet,
daß die Detektionskammer (2) einen Rauchsensor (4,5) und eine elektrische Anpassungsschaltung (6) enthält.Smoke detector according to claim 1,
characterized by
that the detection chamber (2) contains a smoke sensor (4,5) and an electrical matching circuit (6).
dadurch gekennzeichnet,
daß im Gehäuse eine elektronische Signalverarbeitungs- und Alarmauswertungsschaltung (3) angeordnet ist.Smoke detector according to claim 1 or 2,
characterized by
that an electronic signal processing and alarm evaluation circuit (3) is arranged in the housing.
dadurch gekennzeichnet,
daß die elektrische Anpassungsschaltung (6) und die elektronische Signalverarbeitungs- und Alarmauswertungsschaltung (3) durch eine Schnittstelle verbindbar sind, über die Signale übertragbar sind.Smoke detector according to claim 2 or 3,
characterized by
that the electrical adaptation circuit (6) and the electronic signal processing and alarm evaluation circuit (3) can be connected by an interface via which signals can be transmitted.
dadurch gekennzeichnet,
daß die Schnittstelle einen elektrischen Steckverbinder (8) enthält.Smoke detector according to claim 5,
characterized by
that the interface contains an electrical connector (8).
dadurch gekennzeichnet,
daß die Detektionskammer (2) als Rauchsensor ein lichtemittierendes Element (4) und ein lichtempfindliches Element (5) enthält.Smoke detector according to one of the preceding claims,
characterized by
that the detection chamber (2) as a smoke sensor contains a light-emitting element (4) and a light-sensitive element (5).
dadurch gekennzeichnet,
daß er ein Gehäuseoberteil (1) und ein Gehäuseunterteil (9) aufweist.Smoke detector according to one of the preceding claims,
characterized by
that it has an upper housing part (1) and a lower housing part (9).
dadurch gekennzeichnet,
daß die Signalverarbeitungs- und Alarmauswertungsschaltung (3) im Gehäuseunterteil (9) angebracht ist.Smoke detector according to claim 7,
characterized by
that the signal processing and alarm evaluation circuit (3) is mounted in the lower housing part (9).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9416314U DE9416314U1 (en) | 1994-10-10 | 1994-10-10 | smoke detector |
| DE9416314U | 1994-10-10 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0707207A2 true EP0707207A2 (en) | 1996-04-17 |
| EP0707207A3 EP0707207A3 (en) | 1998-05-13 |
| EP0707207B1 EP0707207B1 (en) | 2005-02-09 |
Family
ID=6914712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95113253A Expired - Lifetime EP0707207B1 (en) | 1994-10-10 | 1995-08-23 | Smoke detector |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0707207B1 (en) |
| CN (1) | CN1133461A (en) |
| AT (1) | ATE289062T1 (en) |
| DE (2) | DE9416314U1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2813428A1 (en) * | 2000-08-25 | 2002-03-01 | Arana Juan Carlos Ceron | Camera mount for public transport surveillance is surface mounted |
| KR100453489B1 (en) * | 2001-04-24 | 2004-10-15 | 마츠시다 덴코 가부시키가이샤 | Fire detector unit |
| US9970912B2 (en) | 2012-09-27 | 2018-05-15 | Utc Fire & Security Americas Corporation, Inc. | Modular smoke detection system |
| US11887450B2 (en) | 2018-05-09 | 2024-01-30 | Carrier Corporation | Smoke chamber for multiwave multiangle smoke detector |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10135762A1 (en) * | 2001-07-23 | 2003-02-13 | Luxmate Controls Gmbh Dornbirn | Room sensor with mounting adapter |
| DK1376505T3 (en) * | 2002-06-20 | 2006-06-19 | Siemens Schweiz Ag | fire Detector |
| CN107195160A (en) * | 2017-06-21 | 2017-09-22 | 深圳市泰和安科技有限公司 | Smoke detector and its installation detection method |
| DE102018125494A1 (en) * | 2018-10-15 | 2020-04-16 | Bombardier Transportation Gmbh | Smoke detector for detecting smoke in sections, and vehicle having a smoke detector |
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| DE2250820A1 (en) | 1971-10-20 | 1973-04-26 | Securitas Ab Bevaknings | MEASURING OR INDICATOR FOR SMOKE OD. DGL |
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| US4672217A (en) | 1985-04-05 | 1987-06-09 | General Signal Corporation | Easily cleaned photoelectric smoke detector |
| EP0349403A2 (en) | 1988-06-30 | 1990-01-03 | Emile Hugon | Smoke detector with an integrated address circuit |
| EP0399244A2 (en) | 1989-05-02 | 1990-11-28 | Nohmi Bosai Kabushiki Kaisha | A light-scattering-type smoke detector |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3980997A (en) * | 1974-07-17 | 1976-09-14 | General Signal Corporation | Smoke detector |
| US4249082A (en) * | 1977-09-20 | 1981-02-03 | Cybernet Electronics Corporation | Photoelectric smoke sensor box |
| CH621640A5 (en) * | 1977-11-21 | 1981-02-13 | Cerberus Ag | |
| US4906978A (en) * | 1986-12-24 | 1990-03-06 | Cerberus Ag | Optical smoke detector |
| US5440145A (en) * | 1991-10-14 | 1995-08-08 | I.E.I. Pty. Ltd. | Sampling chamber for a pollution detector |
-
1994
- 1994-10-10 DE DE9416314U patent/DE9416314U1/en not_active Expired - Lifetime
-
1995
- 1995-08-23 AT AT95113253T patent/ATE289062T1/en not_active IP Right Cessation
- 1995-08-23 DE DE59510989T patent/DE59510989D1/en not_active Expired - Lifetime
- 1995-08-23 EP EP95113253A patent/EP0707207B1/en not_active Expired - Lifetime
- 1995-10-10 CN CN95116160A patent/CN1133461A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2130889A1 (en) | 1970-07-23 | 1972-02-03 | Cerberus Ag | Ionization fire alarms |
| DE2205797A1 (en) | 1971-02-09 | 1972-08-24 | Langeron R | Automatic monitoring device |
| DE2250820A1 (en) | 1971-10-20 | 1973-04-26 | Securitas Ab Bevaknings | MEASURING OR INDICATOR FOR SMOKE OD. DGL |
| DE2652970A1 (en) | 1976-11-22 | 1978-05-24 | Hartwig Ing Grad Beyersdorf | IONIZATION FIRE DETECTOR |
| FR2524179A2 (en) | 1977-04-08 | 1983-09-30 | Hugon Emile | Smoke detector using ionisation chamber - where detector is assembled from inexpensive, interchangeable polymer mouldings and uses electronic velocimeter circuit |
| US4672217A (en) | 1985-04-05 | 1987-06-09 | General Signal Corporation | Easily cleaned photoelectric smoke detector |
| EP0349403A2 (en) | 1988-06-30 | 1990-01-03 | Emile Hugon | Smoke detector with an integrated address circuit |
| EP0399244A2 (en) | 1989-05-02 | 1990-11-28 | Nohmi Bosai Kabushiki Kaisha | A light-scattering-type smoke detector |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2813428A1 (en) * | 2000-08-25 | 2002-03-01 | Arana Juan Carlos Ceron | Camera mount for public transport surveillance is surface mounted |
| KR100453489B1 (en) * | 2001-04-24 | 2004-10-15 | 마츠시다 덴코 가부시키가이샤 | Fire detector unit |
| US9970912B2 (en) | 2012-09-27 | 2018-05-15 | Utc Fire & Security Americas Corporation, Inc. | Modular smoke detection system |
| US11887450B2 (en) | 2018-05-09 | 2024-01-30 | Carrier Corporation | Smoke chamber for multiwave multiangle smoke detector |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE289062T1 (en) | 2005-02-15 |
| EP0707207B1 (en) | 2005-02-09 |
| EP0707207A3 (en) | 1998-05-13 |
| CN1133461A (en) | 1996-10-16 |
| DE9416314U1 (en) | 1994-12-01 |
| DE59510989D1 (en) | 2005-03-17 |
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