CA948290A - Fire detecting system - Google Patents

Fire detecting system

Info

Publication number
CA948290A
CA948290A CA139,762A CA139762A CA948290A CA 948290 A CA948290 A CA 948290A CA 139762 A CA139762 A CA 139762A CA 948290 A CA948290 A CA 948290A
Authority
CA
Canada
Prior art keywords
detecting system
fire detecting
fire
detecting
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
CA139,762A
Other versions
CA139762S (en
Inventor
Akihiro Kobayashi
Akira Yokota
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.)
Nittan Co Ltd
Original Assignee
Nittan 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 Nittan Co Ltd filed Critical Nittan Co Ltd
Application granted granted Critical
Publication of CA948290A publication Critical patent/CA948290A/en
Expired 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
    • G08B29/185—Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/04—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using a single signalling line, e.g. in a closed loop

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire Alarms (AREA)
  • Fire-Detection Mechanisms (AREA)
CA139,762A 1971-04-15 1972-04-14 Fire detecting system Expired CA948290A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46023446A JPS5136119B1 (en) 1971-04-15 1971-04-15

Publications (1)

Publication Number Publication Date
CA948290A true CA948290A (en) 1974-05-28

Family

ID=12110715

Family Applications (1)

Application Number Title Priority Date Filing Date
CA139,762A Expired CA948290A (en) 1971-04-15 1972-04-14 Fire detecting system

Country Status (9)

Country Link
US (1) US3775761A (en)
JP (1) JPS5136119B1 (en)
AU (1) AU452761B2 (en)
CA (1) CA948290A (en)
CH (1) CH554031A (en)
FR (1) FR2133747B1 (en)
GB (1) GB1332270A (en)
IT (1) IT954665B (en)
ZA (1) ZA721943B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52116920A (en) * 1976-03-27 1977-09-30 Taisei Corp Method of preventing sedimentation of sludge in underground petroleum storing tanks and apparatus therefor
US4102194A (en) * 1976-09-20 1978-07-25 Dickey-John Corporation Electronic bin temperature monitor
JPS5471710U (en) * 1977-10-31 1979-05-22
US4287515A (en) * 1979-04-27 1981-09-01 Baker Industries, Inc. Fire detection system with multiple output signals
JPS62229394A (en) * 1986-03-14 1987-10-08 ニツタン株式会社 Emergency alarm
US4916432A (en) * 1987-10-21 1990-04-10 Pittway Corporation Smoke and fire detection system communication
US4814748A (en) * 1987-11-09 1989-03-21 Southwest Laboratories, Inc. Temporary desensitization technique for smoke alarms

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2903682A (en) * 1955-12-28 1959-09-08 Petcar Res Corp Flame detector system
US3147464A (en) * 1961-10-16 1964-09-01 Warren L Spielman First-out annunclator having input and supply control of indicator switching means
BE689837A (en) * 1964-09-29 1967-05-02
FR1565498A (en) * 1968-02-15 1969-05-02
US3719836A (en) * 1971-06-23 1973-03-06 C Possell Pressure sensitive sensor and control unit and method of using same
US3694670A (en) * 1971-10-26 1972-09-26 Joseph M Marzolf Easily switched silicon controlled rectifier

Also Published As

Publication number Publication date
GB1332270A (en) 1973-10-03
DE2218198B2 (en) 1973-05-10
AU4079072A (en) 1973-11-01
AU452761B2 (en) 1974-08-23
ZA721943B (en) 1972-12-27
FR2133747A1 (en) 1972-12-01
IT954665B (en) 1973-09-15
US3775761A (en) 1973-11-27
DE2218198A1 (en) 1972-10-26
JPS5136119B1 (en) 1976-10-06
CH554031A (en) 1974-09-13
FR2133747B1 (en) 1973-07-13

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