JPS5395683A - Photoelectric smoke detector - Google Patents

Photoelectric smoke detector

Info

Publication number
JPS5395683A
JPS5395683A JP1094677A JP1094677A JPS5395683A JP S5395683 A JPS5395683 A JP S5395683A JP 1094677 A JP1094677 A JP 1094677A JP 1094677 A JP1094677 A JP 1094677A JP S5395683 A JPS5395683 A JP S5395683A
Authority
JP
Japan
Prior art keywords
smoke detector
photoelectric smoke
light
smoke
stray 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.)
Pending
Application number
JP1094677A
Other languages
Japanese (ja)
Inventor
Shigeto Harano
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 JP1094677A priority Critical patent/JPS5395683A/en
Publication of JPS5395683A publication Critical patent/JPS5395683A/en
Pending 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
    • G08B17/107—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 for detecting light-scattering due to smoke
    • 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
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details

Abstract

PURPOSE:To improve sensitivity and prevent malfunctions by compareng the received light of the scattered light including stray light by smoke and stray light thereby detecting the smoke.
JP1094677A 1977-01-31 1977-01-31 Photoelectric smoke detector Pending JPS5395683A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1094677A JPS5395683A (en) 1977-01-31 1977-01-31 Photoelectric smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1094677A JPS5395683A (en) 1977-01-31 1977-01-31 Photoelectric smoke detector

Publications (1)

Publication Number Publication Date
JPS5395683A true JPS5395683A (en) 1978-08-22

Family

ID=11764361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1094677A Pending JPS5395683A (en) 1977-01-31 1977-01-31 Photoelectric smoke detector

Country Status (1)

Country Link
JP (1) JPS5395683A (en)

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