FR2434438A1 - Dispositif de detection d'incendie a protection contre les facteurs de bruit electrique - Google Patents

Dispositif de detection d'incendie a protection contre les facteurs de bruit electrique

Info

Publication number
FR2434438A1
FR2434438A1 FR7921406A FR7921406A FR2434438A1 FR 2434438 A1 FR2434438 A1 FR 2434438A1 FR 7921406 A FR7921406 A FR 7921406A FR 7921406 A FR7921406 A FR 7921406A FR 2434438 A1 FR2434438 A1 FR 2434438A1
Authority
FR
France
Prior art keywords
detection device
electrical noise
fire detection
protection against
against electrical
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
FR7921406A
Other languages
English (en)
Other versions
FR2434438B1 (fr
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.)
Hochiki Corp
Original Assignee
Hochiki Corp
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
Priority claimed from JP1978116219U external-priority patent/JPS5652554Y2/ja
Priority claimed from JP16179878U external-priority patent/JPS5747909Y2/ja
Application filed by Hochiki Corp filed Critical Hochiki Corp
Publication of FR2434438A1 publication Critical patent/FR2434438A1/fr
Application granted granted Critical
Publication of FR2434438B1 publication Critical patent/FR2434438B1/fr
Granted legal-status Critical Current

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
    • G08B17/11—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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • 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

Abstract

L'invention concerne un dispositif de détection d'incendie. Il comprend un détecteur d'incendie S10 , une première et une deuxième source d'alimentation électrique DC1 et DC2 , un premier et un deuxième circuit L1 et L10 producteur de signaux contenant chacun un élément de commutation à semi-conducteurs, soit T1 et T2 , un premier et un deuxième moyen retardateur respectivement associés au premier et au deuxième circuit, et deux diodes D1 et D2 respectivement disposées entre le détecteur et les sources d'alimentation. Le dispositif de l'invention conserve un fonctionnement fiable s'il reçoit des bruits électriques.
FR7921406A 1978-08-26 1979-08-24 Dispositif de detection d'incendie a protection contre les facteurs de bruit electrique Granted FR2434438A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1978116219U JPS5652554Y2 (fr) 1978-08-26 1978-08-26
JP16179878U JPS5747909Y2 (fr) 1978-11-27 1978-11-27

Publications (2)

Publication Number Publication Date
FR2434438A1 true FR2434438A1 (fr) 1980-03-21
FR2434438B1 FR2434438B1 (fr) 1983-10-07

Family

ID=26454594

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7921406A Granted FR2434438A1 (fr) 1978-08-26 1979-08-24 Dispositif de detection d'incendie a protection contre les facteurs de bruit electrique

Country Status (5)

Country Link
US (1) US4319231A (fr)
AU (1) AU5026479A (fr)
DE (1) DE2934383A1 (fr)
FR (1) FR2434438A1 (fr)
GB (1) GB2034092B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH677413A5 (fr) * 1988-06-10 1991-05-15 Cerberus Ag
JP3128633B2 (ja) * 1992-05-25 2001-01-29 能美防災株式会社 イオン化式煙感知器
GB2508033B (en) * 2012-11-20 2016-02-17 Sprue Safety Products Ltd Low power detection and alarm

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3821734A (en) * 1972-07-17 1974-06-28 Cerberus Ag Fire alarm system with remote central station
US3909814A (en) * 1972-07-14 1975-09-30 Hochiki Co Detecting and control method and apparatus
DE2721853A1 (de) * 1976-05-24 1977-12-08 Nohmi Bosai Kogyo Co Ltd Brandalarmsystem

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2745292C3 (de) * 1977-10-07 1980-07-31 Preussag Ag Feuerschutz, 2060 Bad Oldesloe Spannungsversorgungseinrichtung für die Zentrale einer Meldeanlage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909814A (en) * 1972-07-14 1975-09-30 Hochiki Co Detecting and control method and apparatus
US3821734A (en) * 1972-07-17 1974-06-28 Cerberus Ag Fire alarm system with remote central station
DE2721853A1 (de) * 1976-05-24 1977-12-08 Nohmi Bosai Kogyo Co Ltd Brandalarmsystem

Also Published As

Publication number Publication date
GB2034092B (en) 1983-03-09
DE2934383A1 (de) 1980-03-06
FR2434438B1 (fr) 1983-10-07
AU5026479A (en) 1980-03-06
GB2034092A (en) 1980-05-29
US4319231A (en) 1982-03-09

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Legal Events

Date Code Title Description
ST Notification of lapse