CA1107839A - Latching alarm smoke detector - Google Patents

Latching alarm smoke detector

Info

Publication number
CA1107839A
CA1107839A CA315,140A CA315140A CA1107839A CA 1107839 A CA1107839 A CA 1107839A CA 315140 A CA315140 A CA 315140A CA 1107839 A CA1107839 A CA 1107839A
Authority
CA
Canada
Prior art keywords
clock
condition
pulses
smoke
sensing
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.)
Expired
Application number
CA315,140A
Other languages
English (en)
French (fr)
Inventor
Glenn F. Cooper
Robert B. Enemark
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.)
American District Telegraph Co
Original Assignee
American District Telegraph Co
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
Application filed by American District Telegraph Co filed Critical American District Telegraph Co
Application granted granted Critical
Publication of CA1107839A publication Critical patent/CA1107839A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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)
  • Fire Alarms (AREA)
  • Alarm Systems (AREA)
CA315,140A 1978-03-13 1978-10-31 Latching alarm smoke detector Expired CA1107839A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/885,370 US4193069A (en) 1978-03-13 1978-03-13 Latching alarm smoke detector
US885,370 1978-03-13

Publications (1)

Publication Number Publication Date
CA1107839A true CA1107839A (en) 1981-08-25

Family

ID=25386756

Family Applications (1)

Application Number Title Priority Date Filing Date
CA315,140A Expired CA1107839A (en) 1978-03-13 1978-10-31 Latching alarm smoke detector

Country Status (6)

Country Link
US (1) US4193069A (2)
JP (1) JPS54151399A (2)
CA (1) CA1107839A (2)
DE (1) DE2909810A1 (2)
FR (1) FR2420173A1 (2)
GB (1) GB2017994B (2)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH638331A5 (de) * 1979-02-22 1983-09-15 Cerberus Ag Rauchdetektor.
GB2044504B (en) * 1979-03-17 1983-04-20 Hochiki Co Count discriminating fire detector
JPS6033035A (ja) * 1983-08-02 1985-02-20 Hochiki Corp 減光式煙感知器
JPS6095689U (ja) * 1983-11-30 1985-06-29 ホーチキ株式会社 煙感知器
DE69325852T2 (de) * 1992-05-25 2000-01-27 Nohmi Bosai Ltd., Tokio/Tokyo Feuerdetektor
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
JP3202793B2 (ja) * 1992-05-28 2001-08-27 能美防災株式会社 火災感知器の感度測定装置
AU652513B2 (en) * 1992-06-29 1994-08-25 Nohmi Bosai Ltd Smoke detecting apparatus for fire alarm
US5473314A (en) * 1992-07-20 1995-12-05 Nohmi Bosai, Ltd. High sensitivity smoke detecting apparatus using a plurality of sample gases for calibration
AU653684B2 (en) * 1992-11-04 1994-10-06 Nohmi Bosai Ltd Smoke detecting apparatus for fire alarm
DE4307244C2 (de) * 1993-03-08 1995-01-19 Siemens Ag Gefahrenmeldesystem
JP3588535B2 (ja) * 1997-06-30 2004-11-10 ホーチキ株式会社 煙感知装置
RU2161823C2 (ru) * 1999-08-26 2001-01-10 Акционерное общество закрытого типа "Сфинкс" Индикатор степени взрывоопасности газовоздушной смеси
JP7419151B2 (ja) 2020-04-21 2024-01-22 株式会社東芝 サーバ装置、情報処理方法およびプログラム
JP7438835B2 (ja) 2020-04-21 2024-02-27 株式会社東芝 サーバ装置、通信システム、プログラムおよび情報処理方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3842409A (en) * 1972-12-13 1974-10-15 Unitec Inc Ionization detector apparatus
JPS5545506Y2 (2) * 1972-12-14 1980-10-24
US3946241A (en) * 1973-11-26 1976-03-23 Pyrotector, Incorporated Light detector with pulsed light source and synchronous data gating
JPS52153759A (en) * 1976-06-17 1977-12-21 Hochiki Co Storage type detector
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
FR2420173A1 (fr) 1979-10-12
GB2017994B (en) 1982-11-17
JPS54151399A (en) 1979-11-28
FR2420173B1 (2) 1984-11-09
US4193069A (en) 1980-03-11
DE2909810A1 (de) 1979-09-27
GB2017994A (en) 1979-10-10
JPS6239472B2 (2) 1987-08-24

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Legal Events

Date Code Title Description
MKEX Expiry