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DE60220029D1 - fire alarm - Google Patents

fire alarm

Info

Publication number
DE60220029D1
DE60220029D1 DE60220029T DE60220029T DE60220029D1 DE 60220029 D1 DE60220029 D1 DE 60220029D1 DE 60220029 T DE60220029 T DE 60220029T DE 60220029 T DE60220029 T DE 60220029T DE 60220029 D1 DE60220029 D1 DE 60220029D1
Authority
DE
Germany
Prior art keywords
fire
fire detector
fire alarm
loop
incorporates
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 - Lifetime
Application number
DE60220029T
Other languages
German (de)
Other versions
DE60220029T2 (en
Inventor
Fariz Khellaf
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.)
Eaton Electrical Systems Ltd
Original Assignee
Cooper Lighting and Security 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 Cooper Lighting and Security Ltd filed Critical Cooper Lighting and Security Ltd
Application granted granted Critical
Publication of DE60220029D1 publication Critical patent/DE60220029D1/en
Publication of DE60220029T2 publication Critical patent/DE60220029T2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/181—Prevention or correction of operating errors due to failing power supply
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire Alarms (AREA)

Abstract

A fire alarm system comprises a central controller (10) controlling at least one loop/zone (20) of fire detectors (22). Each fire detector incorporates a thyristor (23), to detect a fire condition and a Shottky diode, to detect removal of the fire detector from the loop (20). The fire detector (22) also incorporates a switch (26) and is arranged to be closed when the fire detector (22) is in place and in circuit and is arranged to open when a power supply to the switch (22) ceases, or fails. <IMAGE>
DE60220029T 2002-06-05 2002-06-05 fire alarm Expired - Lifetime DE60220029T2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02253889A EP1369835B1 (en) 2002-06-05 2002-06-05 Fire detectors

Publications (2)

Publication Number Publication Date
DE60220029D1 true DE60220029D1 (en) 2007-06-21
DE60220029T2 DE60220029T2 (en) 2008-01-10

Family

ID=29433201

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60220029T Expired - Lifetime DE60220029T2 (en) 2002-06-05 2002-06-05 fire alarm

Country Status (3)

Country Link
EP (1) EP1369835B1 (en)
AT (1) ATE362156T1 (en)
DE (1) DE60220029T2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2897968B1 (en) * 2006-02-24 2008-11-21 Airbus France Sas FIRE DETECTION SYSTEM AND AIRCRAFT EQUIPPED WITH SUCH A SYSTEM
JP2014157435A (en) * 2013-02-15 2014-08-28 Nohmi Bosai Ltd Fire alarm facilities
JP6900206B2 (en) * 2017-03-08 2021-07-07 ホーチキ株式会社 Tunnel disaster prevention system
JP6894824B2 (en) 2017-10-26 2021-06-30 ホーチキ株式会社 Tunnel disaster prevention system
CN113844497B (en) * 2021-09-23 2023-06-13 中车株洲电力机车有限公司 Power-concentrated electric locomotive unit and fire alarm interlocking control method and system thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2419919A1 (en) * 1974-04-25 1975-11-13 Grescha Ges Grefe & Scharf Fire alarm system with smoke detectors - has parallel contacts in closed loop and series failure contacts operating when alarm fails
JPS60139254U (en) * 1984-02-28 1985-09-14 ホーチキ株式会社 Photoelectric detection device
EP0423489A1 (en) * 1989-09-15 1991-04-24 Cerberus Ag Smoke detection arrangement with monitoring

Also Published As

Publication number Publication date
ATE362156T1 (en) 2007-06-15
DE60220029T2 (en) 2008-01-10
EP1369835A1 (en) 2003-12-10
EP1369835B1 (en) 2007-05-09

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition