GB1541200A - Fire sensing devices - Google Patents

Fire sensing devices

Info

Publication number
GB1541200A
GB1541200A GB654077A GB654077A GB1541200A GB 1541200 A GB1541200 A GB 1541200A GB 654077 A GB654077 A GB 654077A GB 654077 A GB654077 A GB 654077A GB 1541200 A GB1541200 A GB 1541200A
Authority
GB
United Kingdom
Prior art keywords
sensing devices
fire sensing
fire
devices
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
GB654077A
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.)
Nohmi Bosai Ltd
Original Assignee
Nohmi Bosai Kogyo Co Ltd
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 Nohmi Bosai Kogyo Co Ltd filed Critical Nohmi Bosai Kogyo Co Ltd
Publication of GB1541200A publication Critical patent/GB1541200A/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
    • G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
    • 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
    • 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

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fire-Detection Mechanisms (AREA)
GB654077A 1976-02-16 1977-02-16 Fire sensing devices Expired GB1541200A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1496376A JPS5299099A (en) 1976-02-16 1976-02-16 Fire detector

Publications (1)

Publication Number Publication Date
GB1541200A true GB1541200A (en) 1979-02-21

Family

ID=11875621

Family Applications (1)

Application Number Title Priority Date Filing Date
GB654077A Expired GB1541200A (en) 1976-02-16 1977-02-16 Fire sensing devices

Country Status (3)

Country Link
JP (1) JPS5299099A (en)
DE (1) DE2703233C2 (en)
GB (1) GB1541200A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA786519B (en) * 1978-11-20 1980-02-27 Anglo Amer Corp South Africa Detector
DE102014019773B4 (en) 2014-12-17 2023-12-07 Elmos Semiconductor Se Device and method for distinguishing between solid objects, cooking fumes and smoke using the display of a mobile telephone
DE102014019172B4 (en) 2014-12-17 2023-12-07 Elmos Semiconductor Se Device and method for distinguishing between solid objects, cooking fumes and smoke using a compensating optical measuring system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1014675A (en) * 1973-03-19 1977-07-26 Frank W. Emerson Emergency alarm system

Also Published As

Publication number Publication date
DE2703233C2 (en) 1984-04-19
JPS5734557B2 (en) 1982-07-23
JPS5299099A (en) 1977-08-19
DE2703233A1 (en) 1977-08-18

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940216