GB310682A - Improvements in automatic fire alarms - Google Patents

Improvements in automatic fire alarms

Info

Publication number
GB310682A
GB310682A GB1535828A GB1535828A GB310682A GB 310682 A GB310682 A GB 310682A GB 1535828 A GB1535828 A GB 1535828A GB 1535828 A GB1535828 A GB 1535828A GB 310682 A GB310682 A GB 310682A
Authority
GB
United Kingdom
Prior art keywords
button
casing
disc
spring
support
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
GB1535828A
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
Priority to GB1535828A priority Critical patent/GB310682A/en
Publication of GB310682A publication Critical patent/GB310682A/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)
  • Fire-Detection Mechanisms (AREA)

Abstract

310,682. Long worth, J. R., and Hirst, H. May 25, 1928. Alarms operated by expansion of liquids or solids. - A push - button type of switch for use in an electric circuit and modified to serve as a fire-alarm, comprises a base 3<b>, a support 3<c>, and a casing 2. A heat-sensitive device, such as a capsule 4, is connected at one side to a push button 6, and at the other to a ptuuger 12 sliding through a disc 11 and held outwardly by a spring 12a. The tension of the spring 12<a>, and consequently the temperature at which the alarm operates, is adjusted by adjusting the disc 11 within the support 3<c>. In a modification, the button 6 is enclosed within a part ot the casing 2, and is adjustable by means of a screw with a pointer movable over a scale.
GB1535828A 1928-05-25 1928-05-25 Improvements in automatic fire alarms Expired GB310682A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1535828A GB310682A (en) 1928-05-25 1928-05-25 Improvements in automatic fire alarms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1535828A GB310682A (en) 1928-05-25 1928-05-25 Improvements in automatic fire alarms

Publications (1)

Publication Number Publication Date
GB310682A true GB310682A (en) 1929-05-02

Family

ID=10057743

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1535828A Expired GB310682A (en) 1928-05-25 1928-05-25 Improvements in automatic fire alarms

Country Status (1)

Country Link
GB (1) GB310682A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115585184A (en) * 2022-11-03 2023-01-10 贵州电网有限责任公司 Early warning screw for displaying thermal defects of power grid line

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115585184A (en) * 2022-11-03 2023-01-10 贵州电网有限责任公司 Early warning screw for displaying thermal defects of power grid line

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