JPS5310479A - Smoke detector - Google Patents

Smoke detector

Info

Publication number
JPS5310479A
JPS5310479A JP6391376A JP6391376A JPS5310479A JP S5310479 A JPS5310479 A JP S5310479A JP 6391376 A JP6391376 A JP 6391376A JP 6391376 A JP6391376 A JP 6391376A JP S5310479 A JPS5310479 A JP S5310479A
Authority
JP
Japan
Prior art keywords
installation
providing
smoke detector
automatic gain
contron
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
JP6391376A
Other languages
Japanese (ja)
Inventor
Sumio Kondo
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP6391376A priority Critical patent/JPS5310479A/en
Publication of JPS5310479A publication Critical patent/JPS5310479A/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

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)

Abstract

PURPOSE:To automatically preset a signal level at a reference level upon installation to facilitate the installation and the subsequent maintenace by providing at a receiving portion an amplifier circuit having au automatic gain contron function and by providing an integrating circuit in the feed-back path of the automatic gain control voltage.
JP6391376A 1976-06-01 1976-06-01 Smoke detector Pending JPS5310479A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6391376A JPS5310479A (en) 1976-06-01 1976-06-01 Smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6391376A JPS5310479A (en) 1976-06-01 1976-06-01 Smoke detector

Publications (1)

Publication Number Publication Date
JPS5310479A true JPS5310479A (en) 1978-01-30

Family

ID=13243040

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6391376A Pending JPS5310479A (en) 1976-06-01 1976-06-01 Smoke detector

Country Status (1)

Country Link
JP (1) JPS5310479A (en)

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