JPS5241571A - Abnormality detection circuit in photoelectric smoke detector - Google Patents

Abnormality detection circuit in photoelectric smoke detector

Info

Publication number
JPS5241571A
JPS5241571A JP11788675A JP11788675A JPS5241571A JP S5241571 A JPS5241571 A JP S5241571A JP 11788675 A JP11788675 A JP 11788675A JP 11788675 A JP11788675 A JP 11788675A JP S5241571 A JPS5241571 A JP S5241571A
Authority
JP
Japan
Prior art keywords
detection circuit
abnormality detection
smoke detector
photoelectric smoke
photoelectric
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
JP11788675A
Other languages
Japanese (ja)
Inventor
Kazunari Morisue
Atsushi Yamada
Kensaburo Tanemura
Yoshiharu Suzuki
Kuniharu Tatezuki
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 JP11788675A priority Critical patent/JPS5241571A/en
Publication of JPS5241571A publication Critical patent/JPS5241571A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke

Abstract

PURPOSE:To emit an abnormal signal when a smoke detecting function is lost, and alarm its condition.
JP11788675A 1975-09-29 1975-09-29 Abnormality detection circuit in photoelectric smoke detector Pending JPS5241571A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11788675A JPS5241571A (en) 1975-09-29 1975-09-29 Abnormality detection circuit in photoelectric smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11788675A JPS5241571A (en) 1975-09-29 1975-09-29 Abnormality detection circuit in photoelectric smoke detector

Publications (1)

Publication Number Publication Date
JPS5241571A true JPS5241571A (en) 1977-03-31

Family

ID=14722651

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11788675A Pending JPS5241571A (en) 1975-09-29 1975-09-29 Abnormality detection circuit in photoelectric smoke detector

Country Status (1)

Country Link
JP (1) JPS5241571A (en)

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