JPS5649942A - Smoke sensor - Google Patents

Smoke sensor

Info

Publication number
JPS5649942A
JPS5649942A JP12551379A JP12551379A JPS5649942A JP S5649942 A JPS5649942 A JP S5649942A JP 12551379 A JP12551379 A JP 12551379A JP 12551379 A JP12551379 A JP 12551379A JP S5649942 A JPS5649942 A JP S5649942A
Authority
JP
Japan
Prior art keywords
light
smoke
optical fiber
directional couplers
sensor
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
JP12551379A
Other languages
Japanese (ja)
Other versions
JPS6029061B2 (en
Inventor
Yoshiaki Kanbe
Kuninori Okamoto
Yasushi Mori
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 JP12551379A priority Critical patent/JPS6029061B2/en
Publication of JPS5649942A publication Critical patent/JPS5649942A/en
Publication of JPS6029061B2 publication Critical patent/JPS6029061B2/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)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

PURPOSE:To facilitate wiring works and the like by a method wherein rays are introduced into a detector having directional couplers provided at prescribed apertures through the intermediary of the directional couplers and thereby the device can be constituted by a signal optical fiber. CONSTITUTION:The light from a light-emitting part 1 is transmitted to the 1st smoke sensor 5a and the 2nd smoke sensor 5b by the optical fiber 2 through the intermediary of the 1st directional coulper 4. In the smoke sensors 5a and 5b a pair of directional couplers 6a, 6a' and 6b, 6b' are provided respectively. In the sensor 5a, the light which gets in A branches at C1, radiates from B, gets in A3, branches at O2 and returns again to the original position. A part of the light from A reaches A4 through C2. And, when there is no smoke between B and A3, it returns again to the optical fiber 2, and the light which, reaches a photoreceiving part 3 turns a switch not shown in the figure on, lighting a lamp. When there is any smoke, the quantity of the light which is received is reduced and the switch is turned off, while the lamp is put off.
JP12551379A 1979-09-29 1979-09-29 smoke detector Expired JPS6029061B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12551379A JPS6029061B2 (en) 1979-09-29 1979-09-29 smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12551379A JPS6029061B2 (en) 1979-09-29 1979-09-29 smoke detector

Publications (2)

Publication Number Publication Date
JPS5649942A true JPS5649942A (en) 1981-05-06
JPS6029061B2 JPS6029061B2 (en) 1985-07-08

Family

ID=14911990

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12551379A Expired JPS6029061B2 (en) 1979-09-29 1979-09-29 smoke detector

Country Status (1)

Country Link
JP (1) JPS6029061B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5955485A (en) * 1982-09-24 1984-03-30 富士通株式会社 Pattern code registration apparatus
JPS59165090A (en) * 1983-03-07 1984-09-18 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Character generator
US5168980A (en) * 1989-03-31 1992-12-08 Okamura Corporation Horizontal rotary transfer apparatus
US5188219A (en) * 1989-03-31 1993-02-23 Takayasu Mitsumoto Horizontal rotary transfer apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11764821B2 (en) * 2018-01-17 2023-09-19 Langhans Ventures Llc Mobile phone case with epinephrine injection pen carrying feature

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5955485A (en) * 1982-09-24 1984-03-30 富士通株式会社 Pattern code registration apparatus
JPS59165090A (en) * 1983-03-07 1984-09-18 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Character generator
US5168980A (en) * 1989-03-31 1992-12-08 Okamura Corporation Horizontal rotary transfer apparatus
US5188219A (en) * 1989-03-31 1993-02-23 Takayasu Mitsumoto Horizontal rotary transfer apparatus

Also Published As

Publication number Publication date
JPS6029061B2 (en) 1985-07-08

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