GB666003A - Fire detector and alarm system - Google Patents

Fire detector and alarm system

Info

Publication number
GB666003A
GB666003A GB13619/49A GB1361949A GB666003A GB 666003 A GB666003 A GB 666003A GB 13619/49 A GB13619/49 A GB 13619/49A GB 1361949 A GB1361949 A GB 1361949A GB 666003 A GB666003 A GB 666003A
Authority
GB
United Kingdom
Prior art keywords
bellows
gas
tube
fire
orifice
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
GB13619/49A
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.)
PETCAR RES CORP
Original Assignee
PETCAR RES CORP
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 PETCAR RES CORP filed Critical PETCAR RES CORP
Publication of GB666003A publication Critical patent/GB666003A/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
    • G08B17/04—Hydraulic or pneumatic actuation of the alarm, e.g. by change of fluid pressure

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Alarm Devices (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

666,003. Fire alarms. PETCAR RESEARCH CORPORATION. May 21, 1949. [June 22, 1948] No. 13619/49. Class 118 (i). A fire detecting system comprises an elongated tube which traverses the zone to be protected, the tube is filled with gas absorbing material which is normally impregnated with gas and which is released from the material on occurrence of a temperature rise to cause expansion of the gas and. operation of an electrical contact. The Figure shows a fire alarm in which an elongated tube 2 is packed with granular charcoal 30 which is impregnated with carbon dioxide. With small temperature rises the slow diffusion of carbon dioxide into bellows 4 from the left hand end of tube 2 will be substantially equal to that into bellows 6 from the right hand end of tube 2 .via the orifice 20. With a rapid temperature rise, however, the flow of gas into bellows 4 will be much greater than that through orifice 20 into bellows 6, so that bellows 4 expands, contacts 8, 10 are made and the alarm lamp 16 is illuminated. The filter plugs 22 prevent the gas absorbent material from passing into the bellows.
GB13619/49A 1948-06-22 1949-05-21 Fire detector and alarm system Expired GB666003A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US666003XA 1948-06-22 1948-06-22

Publications (1)

Publication Number Publication Date
GB666003A true GB666003A (en) 1952-02-06

Family

ID=22070528

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13619/49A Expired GB666003A (en) 1948-06-22 1949-05-21 Fire detector and alarm system

Country Status (1)

Country Link
GB (1) GB666003A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3195121A (en) * 1959-05-25 1965-07-13 Jr John E Lindberg Apparatus for heat detection
DE1235624B (en) * 1959-05-25 1967-03-02 John Emery Lindberg Jun Method for producing a temperature sensor with a closed interior

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3195121A (en) * 1959-05-25 1965-07-13 Jr John E Lindberg Apparatus for heat detection
DE1235624B (en) * 1959-05-25 1967-03-02 John Emery Lindberg Jun Method for producing a temperature sensor with a closed interior

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