ZA721943B - Fire detecting system - Google Patents

Fire detecting system

Info

Publication number
ZA721943B
ZA721943B ZA721943A ZA721943A ZA721943B ZA 721943 B ZA721943 B ZA 721943B ZA 721943 A ZA721943 A ZA 721943A ZA 721943 A ZA721943 A ZA 721943A ZA 721943 B ZA721943 B ZA 721943B
Authority
ZA
South Africa
Prior art keywords
detecting system
fire detecting
fire
detecting
Prior art date
Application number
ZA721943A
Other languages
English (en)
Inventor
A Kobayashi
A Yokota
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
Publication of ZA721943B publication Critical patent/ZA721943B/xx

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)
ZA721943A 1971-04-15 1972-03-21 Fire detecting system ZA721943B (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
ZA721943B true ZA721943B (en) 1972-12-27

Family

ID=12110715

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA721943A ZA721943B (en) 1971-04-15 1972-03-21 Fire detecting system

Country Status (9)

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

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 (xx) * 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 (ja) * 1986-03-14 1987-10-08 ニツタン株式会社 異常警報装置
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 (xx) * 1964-09-29 1967-05-02
FR1565498A (xx) * 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 (de) 1973-05-10
AU4079072A (en) 1973-11-01
AU452761B2 (en) 1974-08-23
CA948290A (en) 1974-05-28
FR2133747A1 (xx) 1972-12-01
IT954665B (it) 1973-09-15
US3775761A (en) 1973-11-27
DE2218198A1 (de) 1972-10-26
JPS5136119B1 (xx) 1976-10-06
CH554031A (de) 1974-09-13
FR2133747B1 (xx) 1973-07-13

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