GB485121A - Improvements in and relating to fire alarm systems - Google Patents

Improvements in and relating to fire alarm systems

Info

Publication number
GB485121A
GB485121A GB3168936A GB3168936A GB485121A GB 485121 A GB485121 A GB 485121A GB 3168936 A GB3168936 A GB 3168936A GB 3168936 A GB3168936 A GB 3168936A GB 485121 A GB485121 A GB 485121A
Authority
GB
United Kingdom
Prior art keywords
sheath
fire alarm
conductor
enclosed
combustion
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
GB3168936A
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.)
CECIL EDWARD ELLISTON
Original Assignee
CECIL EDWARD ELLISTON
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 CECIL EDWARD ELLISTON filed Critical CECIL EDWARD ELLISTON
Priority to GB3168936A priority Critical patent/GB485121A/en
Publication of GB485121A publication Critical patent/GB485121A/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
    • G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch

Landscapes

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

Abstract

485,121. Thermal switches. ELLISTON, C. E. Nov. 19, 1936, No. 31689. [Class 38 (v)] A normally open electric circuit incorporating an indicating device forms a fire alarm system, being closed upon the establishment of combustion at any point in the circuit. An inner conductor 1 carries spring members 2 which are enclosed in a tube 3 of celluloid or other insulating combustible material, round which is lapped another conductor 4, the whole being enclosed in a further inflammable sheath 5. The whole may be made of any convenient length, combustion of the sheath at any point allowing contact between spring members 2 and conductor 4 to operate an indicating device or fire-quenching apparatus, collars 6 of a non-inflammable material such as asbestos, localizing burning of the sheath.
GB3168936A 1936-11-19 1936-11-19 Improvements in and relating to fire alarm systems Expired GB485121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3168936A GB485121A (en) 1936-11-19 1936-11-19 Improvements in and relating to fire alarm systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3168936A GB485121A (en) 1936-11-19 1936-11-19 Improvements in and relating to fire alarm systems

Publications (1)

Publication Number Publication Date
GB485121A true GB485121A (en) 1938-05-16

Family

ID=10326933

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3168936A Expired GB485121A (en) 1936-11-19 1936-11-19 Improvements in and relating to fire alarm systems

Country Status (1)

Country Link
GB (1) GB485121A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2542889A (en) * 1947-12-22 1951-02-20 Baertl Paul Heat responsive electric switch
GB2156154A (en) * 1984-03-19 1985-10-02 Edward George Henry Read Temperature sensors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2542889A (en) * 1947-12-22 1951-02-20 Baertl Paul Heat responsive electric switch
GB2156154A (en) * 1984-03-19 1985-10-02 Edward George Henry Read Temperature sensors

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