IE46081L - Smoke detector - Google Patents

Smoke detector

Info

Publication number
IE46081L
IE46081L IE772298A IE229877A IE46081L IE 46081 L IE46081 L IE 46081L IE 772298 A IE772298 A IE 772298A IE 229877 A IE229877 A IE 229877A IE 46081 L IE46081 L IE 46081L
Authority
IE
Ireland
Prior art keywords
smoke
pulse
pulses
alarm
reflected
Prior art date
Application number
IE772298A
Other versions
IE46081B1 (en
Original Assignee
Chloride Batterijen Bv
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 US05/742,225 external-priority patent/US4068130A/en
Priority claimed from US05/742,194 external-priority patent/US4075499A/en
Application filed by Chloride Batterijen Bv filed Critical Chloride Batterijen Bv
Publication of IE46081L publication Critical patent/IE46081L/en
Publication of IE46081B1 publication Critical patent/IE46081B1/en

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

Abstract

An alarm device (K) is actuated by an integrator (T) only if a photocell (C) receives a plurality of successive light pulses, reflected by smoke. In the disconnected mode, a light source (LED) is fed by a pulse generator (P) with low frequency. A first light pulse reflected by smoke occurring triggers via the photocell (C) a flip-flop (F), the output signal of which closes a switch (S1) in order to reduce the distance from the next pulse emitted by the pulse generator (P). Thus, if smoke persists, the number of pulses which the integrator (T) requires to set off the alarm is received in a shorter time. In another embodiment, the pulse frequency is increased by the first light pulse reflected by the smoke for the duration of a predetermined number of pulses or for the duration of a predetermined period of time. In both embodiments, the time required for the alarm to be set off is thus reduced, without increasing the power consumption of the detector device in the disconnected mode and without reducing the service life of the pulsating light source. <IMAGE> [GB1555182A]
IE2298/77A 1976-11-16 1977-11-11 Smoke detector IE46081B1 (en)

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
IE46081L true IE46081L (en) 1978-05-16
IE46081B1 IE46081B1 (en) 1983-02-09

Family

ID=27113981

Family Applications (1)

Application Number Title Priority Date Filing Date
IE2298/77A IE46081B1 (en) 1976-11-16 1977-11-11 Smoke detector

Country Status (14)

Country Link
JP (1) JPS5387282A (en)
AR (1) AR215485A1 (en)
AU (1) AU512053B2 (en)
BR (1) BR7707636A (en)
CA (1) CA1085019A (en)
CH (1) CH620038A5 (en)
DE (1) DE2751073C2 (en)
FR (1) FR2370974A1 (en)
GB (1) GB1555182A (en)
IE (1) IE46081B1 (en)
IL (1) IL52977A (en)
IN (1) IN147535B (en)
NZ (1) NZ185220A (en)
SE (1) SE421841B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2939139A1 (en) * 1979-09-27 1981-04-09 Agfa-Gevaert Ag, 5090 Leverkusen DISTANCE MEASURING DEVICE
JPS56100343A (en) * 1980-01-14 1981-08-12 Matsushita Electric Works Ltd Photoelectric type smoke sensor
JPS6225802U (en) * 1985-07-31 1987-02-17
DE3840277C2 (en) * 1988-11-30 1997-04-17 Diehl Gmbh & Co Device for locating vehicles in the battlefield
DE102014110460B3 (en) * 2014-07-24 2015-05-13 Eq-3 Entwicklung Gmbh Optical smoke detector and method for optical smoke detection

Family Cites Families (2)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
AR215485A1 (en) 1979-10-15
JPS5724501B2 (en) 1982-05-25
IL52977A0 (en) 1977-11-30
DE2751073C2 (en) 1982-06-03
SE7712831L (en) 1978-05-17
CH620038A5 (en) 1980-10-31
AU3066877A (en) 1979-05-24
IE46081B1 (en) 1983-02-09
AU512053B2 (en) 1980-09-18
DE2751073A1 (en) 1978-05-24
IN147535B (en) 1980-03-29
JPS5387282A (en) 1978-08-01
CA1085019A (en) 1980-09-02
NZ185220A (en) 1981-10-19
SE421841B (en) 1982-02-01
FR2370974A1 (en) 1978-06-09
FR2370974B1 (en) 1983-12-23
GB1555182A (en) 1979-11-07
IL52977A (en) 1979-09-30
BR7707636A (en) 1978-08-01

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