FR2395500A1 - Detecteur de fumees - Google Patents
Detecteur de fumeesInfo
- Publication number
- FR2395500A1 FR2395500A1 FR7818296A FR7818296A FR2395500A1 FR 2395500 A1 FR2395500 A1 FR 2395500A1 FR 7818296 A FR7818296 A FR 7818296A FR 7818296 A FR7818296 A FR 7818296A FR 2395500 A1 FR2395500 A1 FR 2395500A1
- Authority
- FR
- France
- Prior art keywords
- clock
- smoke detector
- controlling
- alarm
- pulses
- 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
- 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
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
Détecteur de fumées pour appareil d'alarme. Il comporte une horloge qui produit des impulsions électriques commandant une source de lumière afin que celle-ci produise des impulsions lumineuses, un dispositif photoélectrique de commande d'une alarme qui est actionné par une variation des impulsions lumineuses, et un dispositif qui, sous l'action du dispositif de commande, agit sur un élément de temporisation faisant partie de l'horloge et fait varier ainsi la période d'horloge. Domaine d'application : détection de fumées.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/808,055 US4163969A (en) | 1977-06-20 | 1977-06-20 | Variable frequency light pulser for smoke detectors |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2395500A1 true FR2395500A1 (fr) | 1979-01-19 |
FR2395500B1 FR2395500B1 (fr) | 1983-07-22 |
Family
ID=25197746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7818296A Granted FR2395500A1 (fr) | 1977-06-20 | 1978-06-19 | Detecteur de fumees |
Country Status (6)
Country | Link |
---|---|
US (1) | US4163969A (fr) |
JP (1) | JPS548578A (fr) |
CA (1) | CA1079381A (fr) |
DE (1) | DE2826888A1 (fr) |
FR (1) | FR2395500A1 (fr) |
GB (1) | GB2000863B (fr) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4260984A (en) * | 1979-03-17 | 1981-04-07 | Hochiki Corporation | Count discriminating fire detector |
US4539556A (en) * | 1983-04-15 | 1985-09-03 | Pittway Corporation | Combustion products detector with accelerated test |
JPS60139254U (ja) * | 1984-02-28 | 1985-09-14 | ホーチキ株式会社 | 光電検出装置 |
JPS60231201A (ja) * | 1984-04-29 | 1985-11-16 | Toshiba Corp | センサ回路 |
FR2723233B1 (fr) * | 1994-07-29 | 1996-10-04 | Lewiner Jacques | Perfectionnements aux detecteurs optiques de fumees |
JPH09270085A (ja) * | 1996-04-01 | 1997-10-14 | Hamamatsu Photonics Kk | 発煙検知装置 |
US5831537A (en) * | 1997-10-27 | 1998-11-03 | Slc Technologies, Inc. | Electrical current saving combined smoke and fire detector |
US8903577B2 (en) | 2009-10-30 | 2014-12-02 | Lsi Industries, Inc. | Traction system for electrically powered vehicles |
US7598683B1 (en) | 2007-07-31 | 2009-10-06 | Lsi Industries, Inc. | Control of light intensity using pulses of a fixed duration and frequency |
US8604709B2 (en) | 2007-07-31 | 2013-12-10 | Lsi Industries, Inc. | Methods and systems for controlling electrical power to DC loads |
CN105445234B (zh) | 2008-06-10 | 2019-07-16 | 爱克斯崔里斯科技有限公司 | 粒子检测 |
EP3736558A1 (fr) | 2009-05-01 | 2020-11-11 | Xtralis Technologies Ltd | Détecteur de particules |
GB2551546B (en) | 2016-06-21 | 2020-02-12 | Ffe Ltd | Improvements in or relating to beam phasing |
CN110136390A (zh) * | 2019-05-28 | 2019-08-16 | 赛特威尔电子股份有限公司 | 一种烟雾检测方法、装置、烟雾报警器及存储介质 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3846773A (en) * | 1972-08-18 | 1974-11-05 | W Lintelmann | Battery operated surveillance device |
US3917956A (en) * | 1974-03-08 | 1975-11-04 | Pyrotector Inc | Smoke detector |
US4068130A (en) * | 1976-11-16 | 1978-01-10 | Chloride Incorporated | Smoke detector with means for changing light pulse frequency |
US4075499A (en) * | 1976-11-16 | 1978-02-21 | Chloride, Incorporated | Smoke detector with means for changing light pulse frequency |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5030945Y2 (fr) * | 1971-02-25 | 1975-09-10 |
-
1977
- 1977-06-20 US US05/808,055 patent/US4163969A/en not_active Expired - Lifetime
-
1978
- 1978-06-19 DE DE19782826888 patent/DE2826888A1/de not_active Ceased
- 1978-06-19 FR FR7818296A patent/FR2395500A1/fr active Granted
- 1978-06-19 CA CA305,694A patent/CA1079381A/fr not_active Expired
- 1978-06-20 JP JP7478978A patent/JPS548578A/ja active Granted
- 1978-06-20 GB GB7827386A patent/GB2000863B/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3846773A (en) * | 1972-08-18 | 1974-11-05 | W Lintelmann | Battery operated surveillance device |
US3917956A (en) * | 1974-03-08 | 1975-11-04 | Pyrotector Inc | Smoke detector |
US4068130A (en) * | 1976-11-16 | 1978-01-10 | Chloride Incorporated | Smoke detector with means for changing light pulse frequency |
US4075499A (en) * | 1976-11-16 | 1978-02-21 | Chloride, Incorporated | Smoke detector with means for changing light pulse frequency |
Also Published As
Publication number | Publication date |
---|---|
GB2000863A (en) | 1979-01-17 |
FR2395500B1 (fr) | 1983-07-22 |
JPS548578A (en) | 1979-01-22 |
GB2000863B (en) | 1982-02-03 |
US4163969A (en) | 1979-08-07 |
JPS6155158B2 (fr) | 1986-11-26 |
CA1079381A (fr) | 1980-06-10 |
DE2826888A1 (de) | 1979-01-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2395500A1 (fr) | Detecteur de fumees | |
DK0636266T3 (da) | Anordning til funktionskontrol af røgalarmer | |
FR2333297A1 (fr) | Dispositif de commande d'impulsions d'horloge pour microordinateurs | |
FR2424671A1 (fr) | Generateur de signaux de base de temps | |
PT67878A (fr) | Dispositif de pilotage pour projectile du genre missile | |
FR2426893A1 (fr) | Detecteur d'infrarouge | |
JPS5492233A (en) | Photometric device | |
FR2552553B1 (fr) | Dispositif pour engendrer des impulsions sismiques a l'interieur d'un forage, par chute d'une masse sur un element-cible ancre | |
FR2379321A1 (fr) | Appareil de pulverisation electronique a action intermittente et reglable pour aerosols | |
ATE12990T1 (de) | Elektronisches metronom. | |
FR2424036A1 (fr) | Avertisseur de flamme | |
JPS5733278A (en) | Opening and closing position control device of valve | |
FR2368831A1 (fr) | Procede et dispositif pour selectionner parmi des signaux d'entree, ceux qui sont mutuellement espaces par au moins un intervalle de temps predetermine | |
JPS5338366A (en) | Electronic watch | |
CH623196GA3 (fr) | ||
CH630501B (fr) | Circuit de correction-ajustage du temps pour piece d'horlogerie electronique, notamment montre-bracelet electronique. | |
FR2637392A1 (fr) | Procede pour mesurer la duree d'eclair d'un flash ainsi que dispositif pour la mise en oeuvre d'un tel procede | |
JPS52152197A (en) | Automatic fire monitor system | |
FR2742859B1 (fr) | Dispositif d'amorcage a temps programmable | |
JPS5453570A (en) | Electronic watch with alarm | |
FR2312896A1 (fr) | Dispositif de detection d'un signal d'entree de commande et application a la realisation des repondeurs telephoniques | |
FR2433253A1 (fr) | Relais temporise a maxima | |
JPS5536846A (en) | Sound alarm mechanism of small-size camera | |
JPS53104276A (en) | Electronic watch | |
JPS5468236A (en) | Shutter speed control circuit for industrial exposure device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |