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GB1558915A - Fire alarm system - Google Patents

Fire alarm system Download PDF

Info

Publication number
GB1558915A
GB1558915A GB2074977A GB2074977A GB1558915A GB 1558915 A GB1558915 A GB 1558915A GB 2074977 A GB2074977 A GB 2074977A GB 2074977 A GB2074977 A GB 2074977A GB 1558915 A GB1558915 A GB 1558915A
Authority
GB
United Kingdom
Prior art keywords
control
circuit
signal
transistor
resistor
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.)
Expired
Application number
GB2074977A
Other languages
English (en)
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.)
Nohmi Bosai Ltd
Original Assignee
Nohmi Bosai Kogyo 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 Nohmi Bosai Kogyo Co Ltd filed Critical Nohmi Bosai Kogyo Co Ltd
Publication of GB1558915A publication Critical patent/GB1558915A/en
Expired 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

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire Alarms (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
GB2074977A 1976-05-24 1977-05-17 Fire alarm system Expired GB1558915A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5982276A JPS52142999A (en) 1976-05-24 1976-05-24 Fire alarm facility

Publications (1)

Publication Number Publication Date
GB1558915A true GB1558915A (en) 1980-01-09

Family

ID=13124291

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2074977A Expired GB1558915A (en) 1976-05-24 1977-05-17 Fire alarm system

Country Status (4)

Country Link
JP (1) JPS52142999A (de)
DE (1) DE2721853A1 (de)
GB (1) GB1558915A (de)
SE (1) SE432493B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2151384A (en) * 1983-12-13 1985-07-17 Nittan Co Ltd Environmental alarms
US4722401A (en) * 1982-05-27 1988-02-02 Spectronix Ltd. Actuation circuitry for emergency energization of vehicle fire and explosion detection and suppression system when vehicle is not in operation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5026479A (en) * 1978-08-26 1980-03-06 Hochiki Corp. Fire sensing system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3634839A (en) * 1968-03-11 1972-01-11 American District Telegraph Co Method and apparatus for suppressing spurious alarms in an electrical protection system
JPS5737916B2 (de) * 1972-07-14 1982-08-12
CH547532A (de) * 1972-07-17 1974-03-29 Cerberus Ag Ionisationsfeuermelder.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4722401A (en) * 1982-05-27 1988-02-02 Spectronix Ltd. Actuation circuitry for emergency energization of vehicle fire and explosion detection and suppression system when vehicle is not in operation
GB2151384A (en) * 1983-12-13 1985-07-17 Nittan Co Ltd Environmental alarms

Also Published As

Publication number Publication date
SE7705726L (sv) 1977-11-25
SE432493B (sv) 1984-04-02
DE2721853A1 (de) 1977-12-08
JPS52142999A (en) 1977-11-29

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee