JPS51139390A - Smoke sensor - Google Patents

Smoke sensor

Info

Publication number
JPS51139390A
JPS51139390A JP6364975A JP6364975A JPS51139390A JP S51139390 A JPS51139390 A JP S51139390A JP 6364975 A JP6364975 A JP 6364975A JP 6364975 A JP6364975 A JP 6364975A JP S51139390 A JPS51139390 A JP S51139390A
Authority
JP
Japan
Prior art keywords
smoke sensor
sight
attenuation
light
range
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
JP6364975A
Other languages
Japanese (ja)
Inventor
Yohei Izumi
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 JP6364975A priority Critical patent/JPS51139390A/en
Publication of JPS51139390A publication Critical patent/JPS51139390A/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
    • G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems

Landscapes

  • Physics & Mathematics (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:A device to find fire utilizing the attenuation of light, that can gain sufficient sensitivity within a range of sight.
JP6364975A 1975-05-27 1975-05-27 Smoke sensor Pending JPS51139390A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6364975A JPS51139390A (en) 1975-05-27 1975-05-27 Smoke sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6364975A JPS51139390A (en) 1975-05-27 1975-05-27 Smoke sensor

Publications (1)

Publication Number Publication Date
JPS51139390A true JPS51139390A (en) 1976-12-01

Family

ID=13235397

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6364975A Pending JPS51139390A (en) 1975-05-27 1975-05-27 Smoke sensor

Country Status (1)

Country Link
JP (1) JPS51139390A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3419333A (en) * 1965-09-01 1968-12-31 Ind Res Associates Inc Runway visual range computer system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3419333A (en) * 1965-09-01 1968-12-31 Ind Res Associates Inc Runway visual range computer system

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