JPS5299873A - Photoelectric smoke sensor - Google Patents

Photoelectric smoke sensor

Info

Publication number
JPS5299873A
JPS5299873A JP1631076A JP1631076A JPS5299873A JP S5299873 A JPS5299873 A JP S5299873A JP 1631076 A JP1631076 A JP 1631076A JP 1631076 A JP1631076 A JP 1631076A JP S5299873 A JPS5299873 A JP S5299873A
Authority
JP
Japan
Prior art keywords
smoke sensor
photoelectric smoke
light
enabled
keeping
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.)
Pending
Application number
JP1631076A
Other languages
Japanese (ja)
Inventor
Kuniharu Tatezuki
Kazunari Morisue
Shigeru Matsumoto
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP1631076A priority Critical patent/JPS5299873A/en
Publication of JPS5299873A publication Critical patent/JPS5299873A/en
Pending 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

PURPOSE:To provide a photoelectric smoke sensor, in which there is provided feedback circuit and light-source driving circuit is controlled by keeping the output of light receiving element at a constant level, whereby it is enabled to detect minute change at any time and in reliable manner.
JP1631076A 1976-02-16 1976-02-16 Photoelectric smoke sensor Pending JPS5299873A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1631076A JPS5299873A (en) 1976-02-16 1976-02-16 Photoelectric smoke sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1631076A JPS5299873A (en) 1976-02-16 1976-02-16 Photoelectric smoke sensor

Publications (1)

Publication Number Publication Date
JPS5299873A true JPS5299873A (en) 1977-08-22

Family

ID=11912944

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1631076A Pending JPS5299873A (en) 1976-02-16 1976-02-16 Photoelectric smoke sensor

Country Status (1)

Country Link
JP (1) JPS5299873A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63113698A (en) * 1986-10-30 1988-05-18 オムロン株式会社 Flickering detection circuit
JP2003016546A (en) * 2001-06-29 2003-01-17 Nittan Co Ltd Photoelectric separation type smoke detector and disaster prevention system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63113698A (en) * 1986-10-30 1988-05-18 オムロン株式会社 Flickering detection circuit
JP2003016546A (en) * 2001-06-29 2003-01-17 Nittan Co Ltd Photoelectric separation type smoke detector and disaster prevention system

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