JPS5296586A - Light attenuation type smoke detector - Google Patents

Light attenuation type smoke detector

Info

Publication number
JPS5296586A
JPS5296586A JP1349476A JP1349476A JPS5296586A JP S5296586 A JPS5296586 A JP S5296586A JP 1349476 A JP1349476 A JP 1349476A JP 1349476 A JP1349476 A JP 1349476A JP S5296586 A JPS5296586 A JP S5296586A
Authority
JP
Japan
Prior art keywords
smoke detector
light attenuation
type smoke
attenuation type
light
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.)
Granted
Application number
JP1349476A
Other languages
Japanese (ja)
Other versions
JPS5852182B2 (en
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 JP1349476A priority Critical patent/JPS5852182B2/en
Publication of JPS5296586A publication Critical patent/JPS5296586A/en
Publication of JPS5852182B2 publication Critical patent/JPS5852182B2/en
Expired 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)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

PURPOSE:To alarm the occurrence of smoke and the entry of foreign materials by dividing the light from a light emitting device to more than two beams with a suitable optical system and monitoring the output of a photo detector concerning each beam.
JP1349476A 1976-02-09 1976-02-09 Dimming smoke detector Expired JPS5852182B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1349476A JPS5852182B2 (en) 1976-02-09 1976-02-09 Dimming smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1349476A JPS5852182B2 (en) 1976-02-09 1976-02-09 Dimming smoke detector

Publications (2)

Publication Number Publication Date
JPS5296586A true JPS5296586A (en) 1977-08-13
JPS5852182B2 JPS5852182B2 (en) 1983-11-21

Family

ID=11834659

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1349476A Expired JPS5852182B2 (en) 1976-02-09 1976-02-09 Dimming smoke detector

Country Status (1)

Country Link
JP (1) JPS5852182B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11320856B2 (en) 2018-07-13 2022-05-03 3M Innovative Properties Company Display systems and devices
NO347255B1 (en) * 2018-11-12 2023-08-14 Evolift As Automatic Lifting Concept

Also Published As

Publication number Publication date
JPS5852182B2 (en) 1983-11-21

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