GB1433821A - - Google Patents

Info

Publication number
GB1433821A
GB1433821A GB2317973A GB2317973A GB1433821A GB 1433821 A GB1433821 A GB 1433821A GB 2317973 A GB2317973 A GB 2317973A GB 2317973 A GB2317973 A GB 2317973A GB 1433821 A GB1433821 A GB 1433821A
Authority
GB
United Kingdom
Prior art keywords
plate
lamp
photo
chamber
light
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
GB2317973A
Other languages
English (en)
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 filed Critical
Publication of GB1433821A publication Critical patent/GB1433821A/en
Expired 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
    • G08B17/103—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
    • 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
    • G08B17/113—Constructional details

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)
GB2317973A 1972-08-21 1973-05-15 Expired GB1433821A (enExample)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00282335A US3799670A (en) 1972-08-21 1972-08-21 Smoke detector

Publications (1)

Publication Number Publication Date
GB1433821A true GB1433821A (enExample) 1976-04-28

Family

ID=23081041

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2317973A Expired GB1433821A (enExample) 1972-08-21 1973-05-15

Country Status (12)

Country Link
US (1) US3799670A (enExample)
JP (1) JPS4947098A (enExample)
AR (1) AR196020A1 (enExample)
BR (1) BR7304695D0 (enExample)
CS (1) CS186220B2 (enExample)
DD (1) DD105128A5 (enExample)
DE (1) DE2338080C2 (enExample)
ES (1) ES416667A1 (enExample)
FR (1) FR2197467A5 (enExample)
GB (1) GB1433821A (enExample)
IT (1) IT992949B (enExample)
NL (1) NL7309455A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2270157A (en) * 1992-08-28 1994-03-02 Hochiki Co Light scattering type smoke detector

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985453A (en) * 1974-07-19 1976-10-12 Matsushita Electric Works, Ltd. Light scattering type smoke detector
US4129383A (en) * 1976-02-10 1978-12-12 Chloride Incorporated Smoke detector and housing assembly therefore
JPS5926860U (ja) * 1982-08-12 1984-02-20 東芝電池株式会社 電池収納ケ−ス
DE3608393A1 (de) * 1986-03-13 1987-09-17 Preussag Ag Feuerschutz Optischer rauchmelder
AU667102B2 (en) * 1992-05-14 1996-03-07 Vision Systems Limited Gas sampling point for smoke/pollution detection systems
US5665924A (en) * 1992-05-14 1997-09-09 I.E.I. Pty. Ltd. Gas sampling point for smoke/pollution detection system
WO1993023735A1 (en) * 1992-05-14 1993-11-25 I.E.I. Pty. Ltd. Gas sampling point for smoke/pollution detection systems
US5719557A (en) * 1994-05-19 1998-02-17 Digital Security Controls Ltd. Photoelectric smoke detector
US5581241A (en) * 1994-08-12 1996-12-03 Voice Products Inc. Ultra-sensitive smoke detector
GB2309076B (en) * 1996-01-10 1999-08-11 Kidde Fire Protection Ltd Particle separation and detection apparatus
AU2002247823B2 (en) * 2001-03-10 2006-07-13 Acbond Limited Improvements in and relating to smoke detectors
US7733486B2 (en) * 2007-06-27 2010-06-08 Venturedyne, Ltd. Environmental sensor including a baffle
EP3270362B1 (de) 2017-02-07 2019-01-02 Siemens Schweiz AG Brandmelder mit einer messkammer und mit einem schaltungsträger zur gemeinsamen anordnung eines brandsensors der messkammer sowie zumindest eines weiteren sensors zur erfassung einer messgrösse in der umgebung ausserhalb des brandmelders
WO2019228615A1 (en) 2018-05-29 2019-12-05 Autronica Fire & Security As Hazard detector socket
CN108721803B (zh) * 2018-07-16 2023-11-17 北方工程设计研究院有限公司 一种面向超高大屏蔽暗室的消防过壁平台

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1598941A1 (de) * 1951-01-28 1971-02-25 Pyrotector Gmbh Lichtdichtes Gehaeuse fuer lichtoptische Nachweisvorrichtungen
US3312826A (en) * 1962-11-19 1967-04-04 Sam M Finkle Photoelectric smoke detector with ventilation induced by light source
US3409885A (en) * 1964-03-26 1968-11-05 Guardian Industries Smoke detection apparatus
CH417405A (de) * 1964-07-14 1966-07-15 Cerberus Ag Werk Fuer Elektron Vorrichtung zur Feststellung von Aerosolen in Luft
US3460124A (en) * 1966-06-06 1969-08-05 Interstate Eng Corp Smoke detector
US3555532A (en) * 1968-10-29 1971-01-12 Graham Stuart Corp Vapor or particle detection device
US3708675A (en) * 1969-09-19 1973-01-02 Furukawa Electric Co Ltd Smoke detector in which air entrance and egress are located in oppositely disposed surfaces which are shaped to cause an air velocity differential

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2270157A (en) * 1992-08-28 1994-03-02 Hochiki Co Light scattering type smoke detector
GB2270157B (en) * 1992-08-28 1996-07-24 Hochiki Co Light scattering type smoke detector

Also Published As

Publication number Publication date
CS186220B2 (en) 1978-11-30
DE2338080C2 (de) 1984-11-29
IT992949B (it) 1975-09-30
NL7309455A (enExample) 1974-02-25
BR7304695D0 (pt) 1974-08-22
AR196020A1 (es) 1973-11-23
DD105128A5 (enExample) 1974-04-12
FR2197467A5 (enExample) 1974-03-22
US3799670A (en) 1974-03-26
AU5580273A (en) 1974-11-21
DE2338080A1 (de) 1974-03-07
JPS4947098A (enExample) 1974-05-07
ES416667A1 (es) 1976-02-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee