FI65502C - Branddetektor med oevervakningskrets - Google Patents

Branddetektor med oevervakningskrets Download PDF

Info

Publication number
FI65502C
FI65502C FI790440A FI790440A FI65502C FI 65502 C FI65502 C FI 65502C FI 790440 A FI790440 A FI 790440A FI 790440 A FI790440 A FI 790440A FI 65502 C FI65502 C FI 65502C
Authority
FI
Finland
Prior art keywords
circuit
pulse
signal
output
fire
Prior art date
Application number
FI790440A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI65502B (fi
FI790440A7 (fi
Inventor
Hiroyuki Kitta
Yukio Yamauchi
Original Assignee
Hochiki Co
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 Hochiki Co filed Critical Hochiki Co
Publication of FI790440A7 publication Critical patent/FI790440A7/fi
Application granted granted Critical
Publication of FI65502B publication Critical patent/FI65502B/fi
Publication of FI65502C publication Critical patent/FI65502C/fi

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits
    • G08B29/043—Monitoring of the detection circuits of fire detection circuits
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Alarm Systems (AREA)
FI790440A 1978-02-16 1979-02-09 Branddetektor med oevervakningskrets FI65502C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1978017701U JPS577102Y2 (OSRAM) 1978-02-16 1978-02-16
JP1770178 1978-02-16

Publications (3)

Publication Number Publication Date
FI790440A7 FI790440A7 (fi) 1979-08-17
FI65502B FI65502B (fi) 1984-01-31
FI65502C true FI65502C (fi) 1984-05-10

Family

ID=11951083

Family Applications (1)

Application Number Title Priority Date Filing Date
FI790440A FI65502C (fi) 1978-02-16 1979-02-09 Branddetektor med oevervakningskrets

Country Status (5)

Country Link
US (1) US4247848A (OSRAM)
EP (1) EP0003762B1 (OSRAM)
JP (1) JPS577102Y2 (OSRAM)
DE (1) DE2961927D1 (OSRAM)
FI (1) FI65502C (OSRAM)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4435698A (en) 1980-06-11 1984-03-06 Hekatron Gmbh Circuit arrangement for the transmission of measurements to a central, especially in a fire alarm system
US4337466A (en) * 1980-09-02 1982-06-29 Bell Telephone Laboratories, Incorporated Tamper protection for an automatic remote meter reading unit
JPS58134392A (ja) * 1982-02-04 1983-08-10 ニツタン株式会社 火災報知装置
GB2149167B (en) * 1983-11-04 1987-04-08 Graviner Ltd Electrical circuit arrangements in fire alarms
GB2189613B (en) * 1986-04-24 1991-01-09 Argos Alarms & Security Produc Monitoring means for testing electrical /electronic circuitry or components
US4684887A (en) * 1986-06-24 1987-08-04 General Battery Corporation High voltage test confirmation apparatus
DE3679992D1 (de) * 1986-11-08 1991-08-01 Hirschmann Richard Gmbh Co Schaltungseinrichtung fuer eine meldeeinrichtung zur raumueberwachung.
JPH0444197A (ja) * 1990-06-11 1992-02-13 Tokyo Parts Ind Co Ltd 火炎検出報知器
US5831538A (en) * 1997-03-18 1998-11-03 Schena; Robert G. Electrical fire hazard detector
CA2206969C (en) * 1997-06-04 2006-08-08 Digital Security Controls Ltd. Self diagnostic heat detector
EP1196825A2 (en) * 1999-07-20 2002-04-17 Wheelock Inc. Method and apparatus for supervising an audio circuit with continuous audio
US6791453B1 (en) 2000-08-11 2004-09-14 Walter Kidde Portable Equipment, Inc. Communication protocol for interconnected hazardous condition detectors, and system employing same
US8232884B2 (en) * 2009-04-24 2012-07-31 Gentex Corporation Carbon monoxide and smoke detectors having distinct alarm indications and a test button that indicates improper operation
US8836532B2 (en) 2009-07-16 2014-09-16 Gentex Corporation Notification appliance and method thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3492589A (en) * 1967-04-03 1970-01-27 Honeywell Inc Failsafe circuit apparatus
US3787838A (en) * 1972-06-29 1974-01-22 Bendix Corp Fail safe built-in test equipment
US4030095A (en) * 1976-01-19 1977-06-14 Honeywell Inc. Pulsed alarm system
JPS52153759A (en) * 1976-06-17 1977-12-21 Hochiki Co Storage type detector

Also Published As

Publication number Publication date
US4247848A (en) 1981-01-27
DE2961927D1 (en) 1982-03-11
EP0003762B1 (en) 1982-01-27
JPS577102Y2 (OSRAM) 1982-02-10
FI65502B (fi) 1984-01-31
JPS54122790U (OSRAM) 1979-08-28
FI790440A7 (fi) 1979-08-17
EP0003762A1 (en) 1979-09-05

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: HOCHIKI CORPORATION