JPS53139590A - Fire detector - Google Patents

Fire detector

Info

Publication number
JPS53139590A
JPS53139590A JP5509277A JP5509277A JPS53139590A JP S53139590 A JPS53139590 A JP S53139590A JP 5509277 A JP5509277 A JP 5509277A JP 5509277 A JP5509277 A JP 5509277A JP S53139590 A JPS53139590 A JP S53139590A
Authority
JP
Japan
Prior art keywords
fire detector
signal
rays
prodcues
detectign
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
JP5509277A
Other languages
Japanese (ja)
Other versions
JPS6145170B2 (en
Inventor
Miki Kobayashi
Hiroshi Hidaka
Kazuyoshi Tsubosaka
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP5509277A priority Critical patent/JPS53139590A/en
Publication of JPS53139590A publication Critical patent/JPS53139590A/en
Publication of JPS6145170B2 publication Critical patent/JPS6145170B2/ja
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
    • G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

PURPOSE:To obtain positively screened fire alarm signal by simultaneously using both detectors of infrared rays and visible rays and outputting a detecting signal only when only the infrared ray detectign system prodcues the signal.
JP5509277A 1977-05-12 1977-05-12 Fire detector Granted JPS53139590A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5509277A JPS53139590A (en) 1977-05-12 1977-05-12 Fire detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5509277A JPS53139590A (en) 1977-05-12 1977-05-12 Fire detector

Publications (2)

Publication Number Publication Date
JPS53139590A true JPS53139590A (en) 1978-12-05
JPS6145170B2 JPS6145170B2 (en) 1986-10-07

Family

ID=12989082

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5509277A Granted JPS53139590A (en) 1977-05-12 1977-05-12 Fire detector

Country Status (1)

Country Link
JP (1) JPS53139590A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5726451A (en) * 1994-08-02 1998-03-10 Hochiki Corporation Scan type fire detecting apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5726451A (en) * 1994-08-02 1998-03-10 Hochiki Corporation Scan type fire detecting apparatus

Also Published As

Publication number Publication date
JPS6145170B2 (en) 1986-10-07

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