JPS52145276A - Smoke sensor - Google Patents

Smoke sensor

Info

Publication number
JPS52145276A
JPS52145276A JP6208776A JP6208776A JPS52145276A JP S52145276 A JPS52145276 A JP S52145276A JP 6208776 A JP6208776 A JP 6208776A JP 6208776 A JP6208776 A JP 6208776A JP S52145276 A JPS52145276 A JP S52145276A
Authority
JP
Japan
Prior art keywords
smoke sensor
comparator
receiving
level voltage
transmitter
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
JP6208776A
Other languages
Japanese (ja)
Inventor
Sumio Kondo
Hideo Hachiman
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP6208776A priority Critical patent/JPS52145276A/en
Publication of JPS52145276A publication Critical patent/JPS52145276A/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 make unnecessary regulation of signal level applied by comparator, and also dust off maintenance, by applying integral of receiving level voltage as reference level voltage for receiving comparator in a smoke sensor where transmitter and receiver for light are located facing each other.
JP6208776A 1976-05-28 1976-05-28 Smoke sensor Pending JPS52145276A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6208776A JPS52145276A (en) 1976-05-28 1976-05-28 Smoke sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6208776A JPS52145276A (en) 1976-05-28 1976-05-28 Smoke sensor

Publications (1)

Publication Number Publication Date
JPS52145276A true JPS52145276A (en) 1977-12-03

Family

ID=13189914

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6208776A Pending JPS52145276A (en) 1976-05-28 1976-05-28 Smoke sensor

Country Status (1)

Country Link
JP (1) JPS52145276A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60169740A (en) * 1984-02-14 1985-09-03 Nippon Denso Co Ltd Smoke detector

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4958884A (en) * 1972-10-03 1974-06-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4958884A (en) * 1972-10-03 1974-06-07

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60169740A (en) * 1984-02-14 1985-09-03 Nippon Denso Co Ltd Smoke detector

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