JPS5227683A - Smoke detector - Google Patents

Smoke detector

Info

Publication number
JPS5227683A
JPS5227683A JP10014475A JP10014475A JPS5227683A JP S5227683 A JPS5227683 A JP S5227683A JP 10014475 A JP10014475 A JP 10014475A JP 10014475 A JP10014475 A JP 10014475A JP S5227683 A JPS5227683 A JP S5227683A
Authority
JP
Japan
Prior art keywords
smoke detector
smoke
devised
optical path
false alarm
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
JP10014475A
Other languages
Japanese (ja)
Other versions
JPS5529384B2 (en
Inventor
Shunsaku Nakauchi
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.)
KOKUSAI GIJIYUTSU KAIHATSU KK
Kokusai Gijutsu Kaihatsu Co Ltd
Original Assignee
KOKUSAI GIJIYUTSU KAIHATSU KK
Kokusai Gijutsu Kaihatsu Co 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 KOKUSAI GIJIYUTSU KAIHATSU KK, Kokusai Gijutsu Kaihatsu Co Ltd filed Critical KOKUSAI GIJIYUTSU KAIHATSU KK
Priority to JP10014475A priority Critical patent/JPS5227683A/en
Publication of JPS5227683A publication Critical patent/JPS5227683A/en
Publication of JPS5529384B2 publication Critical patent/JPS5529384B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

PURPOSE:To provide a smoke detector which is so devised that it does not emit false alarm even if optical path is temporarily shaded by an obstructive object other than smoke.
JP10014475A 1975-08-20 1975-08-20 Smoke detector Granted JPS5227683A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10014475A JPS5227683A (en) 1975-08-20 1975-08-20 Smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10014475A JPS5227683A (en) 1975-08-20 1975-08-20 Smoke detector

Publications (2)

Publication Number Publication Date
JPS5227683A true JPS5227683A (en) 1977-03-02
JPS5529384B2 JPS5529384B2 (en) 1980-08-02

Family

ID=14266106

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10014475A Granted JPS5227683A (en) 1975-08-20 1975-08-20 Smoke detector

Country Status (1)

Country Link
JP (1) JPS5227683A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5333678A (en) * 1976-09-10 1978-03-29 Nohmi Bosai Kogyo Co Ltd Optical fire sensor
JPH02254344A (en) * 1989-03-29 1990-10-15 Sharp Corp Field view measuring apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0412337Y2 (en) * 1988-07-29 1992-03-25

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5333678A (en) * 1976-09-10 1978-03-29 Nohmi Bosai Kogyo Co Ltd Optical fire sensor
JPS5760678B2 (en) * 1976-09-10 1982-12-21 Nohmi Bosai Kogyo Co Ltd
JPH02254344A (en) * 1989-03-29 1990-10-15 Sharp Corp Field view measuring apparatus

Also Published As

Publication number Publication date
JPS5529384B2 (en) 1980-08-02

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