JPS5280879A - Attenuation type smoke detector - Google Patents

Attenuation type smoke detector

Info

Publication number
JPS5280879A
JPS5280879A JP15609675A JP15609675A JPS5280879A JP S5280879 A JPS5280879 A JP S5280879A JP 15609675 A JP15609675 A JP 15609675A JP 15609675 A JP15609675 A JP 15609675A JP S5280879 A JPS5280879 A JP S5280879A
Authority
JP
Japan
Prior art keywords
smoke detector
type smoke
attenuation type
attenuation
senstivity
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
JP15609675A
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 JP15609675A priority Critical patent/JPS5280879A/en
Publication of JPS5280879A publication Critical patent/JPS5280879A/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
    • G01N21/534—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke by measuring transmission alone, i.e. determining opacity

Landscapes

  • Physics & Mathematics (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)

Abstract

PURPOSE:To increase the quantity of light attenuation and improve smoke detection senstivity by providing a light emitting device and a photo detector on one side of prisms, thereby making detection distance longer.
JP15609675A 1975-12-27 1975-12-27 Attenuation type smoke detector Pending JPS5280879A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15609675A JPS5280879A (en) 1975-12-27 1975-12-27 Attenuation type smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15609675A JPS5280879A (en) 1975-12-27 1975-12-27 Attenuation type smoke detector

Publications (1)

Publication Number Publication Date
JPS5280879A true JPS5280879A (en) 1977-07-06

Family

ID=15620212

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15609675A Pending JPS5280879A (en) 1975-12-27 1975-12-27 Attenuation type smoke detector

Country Status (1)

Country Link
JP (1) JPS5280879A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5532942A (en) * 1991-07-08 1996-07-02 Shin-Etsu Chemical Co., Ltd. Automatic apparatus for inspecting powdery product

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5532942A (en) * 1991-07-08 1996-07-02 Shin-Etsu Chemical Co., Ltd. Automatic apparatus for inspecting powdery product

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