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GB1065338A - Fire detection circuit - Google Patents

Fire detection circuit

Info

Publication number
GB1065338A
GB1065338A GB11363/66A GB1136366A GB1065338A GB 1065338 A GB1065338 A GB 1065338A GB 11363/66 A GB11363/66 A GB 11363/66A GB 1136366 A GB1136366 A GB 1136366A GB 1065338 A GB1065338 A GB 1065338A
Authority
GB
United Kingdom
Prior art keywords
alarm
caution
switches
indicator
relay
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
GB11363/66A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1065338A publication Critical patent/GB1065338A/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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/04—Hydraulic or pneumatic actuation of the alarm, e.g. by change of fluid pressure
    • 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
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details

Landscapes

  • Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fire Alarms (AREA)

Abstract

1,065,338. Fire alarm systems. J. E. LINDBERG. March 15, 1966 [April 26, 1965], No. 11363/66. Heading G4N. A fire alarm system comprises a pair of normally open detector switches 50, 51, e.g. of the gas evolving type, connected in series with an alarm indicator 20 between a supply line 12 and earth, each switch being shunted by a " caution ' indicator 31, 32, or 36, 37. The alarm indicator has a low impedance compared with the caution indicators so that closure of both switches lights alarm lamps 20, and closure of only one actuates only the caution indicator associated with the other. The switches may be arranged to operate at different temperatures so that a " caution " indication is first given and, after a further rise in temperature, the alarm 20 is operated. The alarm 20 may be supplemented by a relay 26 operating an acoustic alarm. Actuation of one of the cautions may be caused by a fault condition by actuation of test switches 41, 42, 43 to disconnect either detector and replace it by a short circuit. A manual test switch 64 is also provided which actuates relay 62 to close contacts 65, 66 completing a test heating circuit. Fig. 1 (not shown) relates to a simplified circuit employing any type of thermal switch, and in Fig. 2 (not shown) the manual test relay is omitted.
GB11363/66A 1965-04-26 1966-03-15 Fire detection circuit Expired GB1065338A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US450645A US3380045A (en) 1965-04-26 1965-04-26 Redundant fire detection circuit

Publications (1)

Publication Number Publication Date
GB1065338A true GB1065338A (en) 1967-04-12

Family

ID=23788932

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11363/66A Expired GB1065338A (en) 1965-04-26 1966-03-15 Fire detection circuit

Country Status (2)

Country Link
US (1) US3380045A (en)
GB (1) GB1065338A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1555800A (en) * 1967-12-08 1969-01-31
US3541539A (en) * 1968-11-29 1970-11-17 Us Air Force Integrated fire and overheat detection system for manned flight vehicles
US3896423A (en) * 1973-09-14 1975-07-22 John E Lindberg Fire and overheat detection system
US3911412A (en) * 1974-01-17 1975-10-07 John F Bennetts High and low temperature warning device
US4027302A (en) * 1976-06-03 1977-05-31 W. E. Healey & Associates, Inc. Double detection circuit for conserving energy in fire detection systems and the like
DE2815183C2 (en) * 1978-04-07 1984-12-06 Hans-Günther 8000 München Stadelmayr Alarm, security and monitoring system
US4351394A (en) * 1979-12-28 1982-09-28 Enk William A Method and system for aircraft fire protection
US4566542A (en) * 1981-11-25 1986-01-28 William A. Enk Fire protection system for aircraft
US5172099A (en) * 1990-05-15 1992-12-15 Walter Kidde Aerospace Inc. Self monitoring fire detection system
CN114073835B (en) * 2021-10-20 2022-09-09 成都领派科技有限公司 Prevent mistake and spout equipment suitable for gaseous fire extinguishing systems

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2448026A (en) * 1943-04-10 1948-08-31 Specialties Dev Corp Electrical detecting circuit and device for testing the same
US3195121A (en) * 1959-05-25 1965-07-13 Jr John E Lindberg Apparatus for heat detection

Also Published As

Publication number Publication date
US3380045A (en) 1968-04-23

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