JPS5237084A - Smoke detector - Google Patents

Smoke detector

Info

Publication number
JPS5237084A
JPS5237084A JP11256175A JP11256175A JPS5237084A JP S5237084 A JPS5237084 A JP S5237084A JP 11256175 A JP11256175 A JP 11256175A JP 11256175 A JP11256175 A JP 11256175A JP S5237084 A JPS5237084 A JP S5237084A
Authority
JP
Japan
Prior art keywords
smoke detector
indentified
memorized
lapse
flashing
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
JP11256175A
Other languages
Japanese (ja)
Inventor
Shunsaku Nakauchi
Akifusa Takahashi
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.)
KOKUSAI GIJIYUTSU KAIHATSU KK
Kokusai Gijutsu Kaihatsu Co Ltd
Original Assignee
KOKUSAI GIJIYUTSU KAIHATSU KK
Kokusai Gijutsu Kaihatsu 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 KOKUSAI GIJIYUTSU KAIHATSU KK, Kokusai Gijutsu Kaihatsu Co Ltd filed Critical KOKUSAI GIJIYUTSU KAIHATSU KK
Priority to JP11256175A priority Critical patent/JPS5237084A/en
Publication of JPS5237084A publication Critical patent/JPS5237084A/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
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • G01N21/274—Calibration, base line adjustment, drift correction

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

PURPOSE:Receiver outputs are fed back, memorized, compared and indentified by flashing a switch upon lapse of time, whereby correct alarm is given despite decrease in the quantity of transmission light owing to deterioration, etc. of the device.
JP11256175A 1975-09-19 1975-09-19 Smoke detector Pending JPS5237084A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11256175A JPS5237084A (en) 1975-09-19 1975-09-19 Smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11256175A JPS5237084A (en) 1975-09-19 1975-09-19 Smoke detector

Publications (1)

Publication Number Publication Date
JPS5237084A true JPS5237084A (en) 1977-03-22

Family

ID=14589745

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11256175A Pending JPS5237084A (en) 1975-09-19 1975-09-19 Smoke detector

Country Status (1)

Country Link
JP (1) JPS5237084A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317113A (en) * 1979-08-24 1982-02-23 Hochiki Corporation Photoelectric smoke sensor
JPS60146397A (en) * 1984-01-11 1985-08-02 能美防災株式会社 Environmental change monitor
JPS61223999A (en) * 1985-03-29 1986-10-04 能美防災株式会社 Alarm circuit for fire alarm machine
JPS61267900A (en) * 1984-12-18 1986-11-27 ホーチキ株式会社 Dimmer type smoke detector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4923685A (en) * 1972-06-23 1974-03-02
JPS4958884A (en) * 1972-10-03 1974-06-07

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4923685A (en) * 1972-06-23 1974-03-02
JPS4958884A (en) * 1972-10-03 1974-06-07

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317113A (en) * 1979-08-24 1982-02-23 Hochiki Corporation Photoelectric smoke sensor
JPS60146397A (en) * 1984-01-11 1985-08-02 能美防災株式会社 Environmental change monitor
JPH0522957B2 (en) * 1984-01-11 1993-03-31 Nohmi Bosai Ltd
JPS61267900A (en) * 1984-12-18 1986-11-27 ホーチキ株式会社 Dimmer type smoke detector
JPH0531199B2 (en) * 1984-12-18 1993-05-11 Hochiki Co
JPS61223999A (en) * 1985-03-29 1986-10-04 能美防災株式会社 Alarm circuit for fire alarm machine

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