FR2370974A1 - Detecteur de fumee - Google Patents
Detecteur de fumeeInfo
- Publication number
- FR2370974A1 FR2370974A1 FR7734469A FR7734469A FR2370974A1 FR 2370974 A1 FR2370974 A1 FR 2370974A1 FR 7734469 A FR7734469 A FR 7734469A FR 7734469 A FR7734469 A FR 7734469A FR 2370974 A1 FR2370974 A1 FR 2370974A1
- Authority
- FR
- France
- Prior art keywords
- smoke
- light
- smoke detector
- pulses
- reflection
- 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
Links
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
Landscapes
- 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
L'invention concerne la détection de fumée par réflexion de lumière. Le détecteur de fumée de l'invention comprend essentiellement une cellule photoélectrique C sensible à la lumière émise par une diode électroluminescente LED et réfléchie par la fumée. La diode fonctionne par impulsions avec une cadence de répétition qui est lente en l'absence de fumée et qui augmente en cas de détection de fumée au cours d'une impulsion. Application à la protection contre l'incendie.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/742,225 US4068130A (en) | 1976-11-16 | 1976-11-16 | Smoke detector with means for changing light pulse frequency |
US05/742,194 US4075499A (en) | 1976-11-16 | 1976-11-16 | Smoke detector with means for changing light pulse frequency |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2370974A1 true FR2370974A1 (fr) | 1978-06-09 |
FR2370974B1 FR2370974B1 (fr) | 1983-12-23 |
Family
ID=27113981
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7734469A Granted FR2370974A1 (fr) | 1976-11-16 | 1977-11-16 | Detecteur de fumee |
Country Status (14)
Country | Link |
---|---|
JP (1) | JPS5387282A (fr) |
AR (1) | AR215485A1 (fr) |
AU (1) | AU512053B2 (fr) |
BR (1) | BR7707636A (fr) |
CA (1) | CA1085019A (fr) |
CH (1) | CH620038A5 (fr) |
DE (1) | DE2751073C2 (fr) |
FR (1) | FR2370974A1 (fr) |
GB (1) | GB1555182A (fr) |
IE (1) | IE46081B1 (fr) |
IL (1) | IL52977A (fr) |
IN (1) | IN147535B (fr) |
NZ (1) | NZ185220A (fr) |
SE (1) | SE421841B (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2939139A1 (de) * | 1979-09-27 | 1981-04-09 | Agfa-Gevaert Ag, 5090 Leverkusen | Entfernungsmessvorrichtung |
JPS56100343A (en) * | 1980-01-14 | 1981-08-12 | Matsushita Electric Works Ltd | Photoelectric type smoke sensor |
JPS6225802U (fr) * | 1985-07-31 | 1987-02-17 | ||
DE3840277C2 (de) * | 1988-11-30 | 1997-04-17 | Diehl Gmbh & Co | Einrichtung zur Lokalisierung von Fahrzeugen im Gefechtsfeld |
DE102014110460B3 (de) | 2014-07-24 | 2015-05-13 | Eq-3 Entwicklung Gmbh | Optischer Rauchmelder und Verfahren zur optischen Rauchdetektion |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3917956A (en) * | 1974-03-08 | 1975-11-04 | Pyrotector Inc | Smoke detector |
US3946241A (en) * | 1973-11-26 | 1976-03-23 | Pyrotector, Incorporated | Light detector with pulsed light source and synchronous data gating |
-
1977
- 1977-09-21 NZ NZ185220A patent/NZ185220A/xx unknown
- 1977-09-21 IL IL52977A patent/IL52977A/xx unknown
- 1977-10-04 IN IN291/DEL/77A patent/IN147535B/en unknown
- 1977-10-31 AR AR269786A patent/AR215485A1/es active
- 1977-11-07 CA CA290,290A patent/CA1085019A/fr not_active Expired
- 1977-11-08 CH CH1362577A patent/CH620038A5/de not_active IP Right Cessation
- 1977-11-08 JP JP13403377A patent/JPS5387282A/ja active Granted
- 1977-11-11 IE IE2298/77A patent/IE46081B1/en unknown
- 1977-11-14 SE SE7712831A patent/SE421841B/xx unknown
- 1977-11-15 AU AU30668/77A patent/AU512053B2/en not_active Expired
- 1977-11-15 DE DE2751073A patent/DE2751073C2/de not_active Expired
- 1977-11-16 GB GB47701/77A patent/GB1555182A/en not_active Expired
- 1977-11-16 FR FR7734469A patent/FR2370974A1/fr active Granted
- 1977-11-16 BR BR7707636A patent/BR7707636A/pt unknown
Also Published As
Publication number | Publication date |
---|---|
IL52977A0 (en) | 1977-11-30 |
AR215485A1 (es) | 1979-10-15 |
JPS5724501B2 (fr) | 1982-05-25 |
AU3066877A (en) | 1979-05-24 |
DE2751073C2 (de) | 1982-06-03 |
BR7707636A (pt) | 1978-08-01 |
CH620038A5 (en) | 1980-10-31 |
GB1555182A (en) | 1979-11-07 |
IN147535B (fr) | 1980-03-29 |
AU512053B2 (en) | 1980-09-18 |
JPS5387282A (en) | 1978-08-01 |
IE46081L (en) | 1978-05-16 |
SE7712831L (sv) | 1978-05-17 |
SE421841B (sv) | 1982-02-01 |
NZ185220A (en) | 1981-10-19 |
FR2370974B1 (fr) | 1983-12-23 |
DE2751073A1 (de) | 1978-05-24 |
IL52977A (en) | 1979-09-30 |
CA1085019A (fr) | 1980-09-02 |
IE46081B1 (en) | 1983-02-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SE8504112D0 (sv) | Photoelectric smoke sensor | |
GB2000373B (en) | A diode capable of alternately functioning as an emitter and detector of light of the same wavelength | |
IT7848682A0 (it) | Sistema di illuminazione con sorgente di luce orientata comprendente un deflettore modificante il percorso della luce per evitare le riflessioni di velatura | |
DE3781657D1 (de) | Photoelektrischer schalter vom reflektionstyp. | |
ES522683A0 (es) | Detector de humos basado en el principado de la extincion de radiacion. | |
FR2370974A1 (fr) | Detecteur de fumee | |
FR2318417A1 (fr) | Detecteur de fumee du type a diffusion de lumiere | |
BE847106A (fr) | Dispositif d'augmentation de la cadence d'impulsions d'un faisceau laser, | |
FR2420173A1 (fr) | Dispositif de detection d'une condition d'alarme | |
JPS5462800A (en) | Light type smoke sensor having trouble detecting function | |
JPS5544927A (en) | Smoke sensor | |
SE7611996L (sv) | Dorrbevakning med brytljusstrale | |
IT7826360A0 (it) | Elevatore di fumo a ionizzazione con sensibilita' controllata. | |
JPS5413391A (en) | Smoke sensor | |
JPS5364083A (en) | Photoelectric smoke detector | |
JPS5622936A (en) | Light scattering system smoke detector | |
JPS52156681A (en) | Smoke sensor of light scattering type | |
JPS5280879A (en) | Attenuation type smoke detector | |
JPS5361298A (en) | Photoelectric smoke detector | |
JPS52135297A (en) | Signal processing circuit for photoelectric smoke detectors | |
JPS5280881A (en) | Attenuation type smoke detector | |
JPS5433081A (en) | Photoelectric type smoke detector | |
JPS57103081A (en) | Parts detector | |
FR2335797A1 (fr) | Dispositif d'allumage comprenant une diode a emission de lumiere a resistance negative | |
JPS5395683A (en) | Photoelectric smoke detector |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
TP | Transmission of property | ||
ST | Notification of lapse |