JPS6229018B2 - - Google Patents

Info

Publication number
JPS6229018B2
JPS6229018B2 JP9657580A JP9657580A JPS6229018B2 JP S6229018 B2 JPS6229018 B2 JP S6229018B2 JP 9657580 A JP9657580 A JP 9657580A JP 9657580 A JP9657580 A JP 9657580A JP S6229018 B2 JPS6229018 B2 JP S6229018B2
Authority
JP
Japan
Prior art keywords
light
smoke
optical path
circuit
path length
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.)
Expired
Application number
JP9657580A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5722541A (en
Inventor
Tsunehiko Araki
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 JP9657580A priority Critical patent/JPS5722541A/ja
Publication of JPS5722541A publication Critical patent/JPS5722541A/ja
Publication of JPS6229018B2 publication Critical patent/JPS6229018B2/ja
Granted 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)
  • Fire-Detection Mechanisms (AREA)
JP9657580A 1980-07-15 1980-07-15 Light reduction type smoke sensor Granted JPS5722541A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9657580A JPS5722541A (en) 1980-07-15 1980-07-15 Light reduction type smoke sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9657580A JPS5722541A (en) 1980-07-15 1980-07-15 Light reduction type smoke sensor

Publications (2)

Publication Number Publication Date
JPS5722541A JPS5722541A (en) 1982-02-05
JPS6229018B2 true JPS6229018B2 (fr) 1987-06-24

Family

ID=14168774

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9657580A Granted JPS5722541A (en) 1980-07-15 1980-07-15 Light reduction type smoke sensor

Country Status (1)

Country Link
JP (1) JPS5722541A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0094534B1 (fr) * 1982-05-13 1987-01-14 Cerberus Ag Détecteur de fumée suivant le principe du rayonnement-extinction
JPS59202595A (ja) * 1983-04-30 1984-11-16 松下電工株式会社 火報システム
CA1277005C (fr) * 1983-10-21 1990-11-27 Martin T. Cole Dispositif detecteur de fumee
US5850979A (en) * 1994-08-23 1998-12-22 Daiwa Seiko, Inc. Fishing reel of double bearing type having improved balance and ergonomic properties
JPH09140302A (ja) * 1995-11-20 1997-06-03 Daiwa Seiko Inc 魚釣用両軸受型リール
JP3325189B2 (ja) * 1996-02-20 2002-09-17 ダイワ精工株式会社 魚釣用両軸受型リール

Also Published As

Publication number Publication date
JPS5722541A (en) 1982-02-05

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