GB525483A - Improvements in and connected with thermal switch apparatus for electric fire alarms - Google Patents

Improvements in and connected with thermal switch apparatus for electric fire alarms

Info

Publication number
GB525483A
GB525483A GB585339A GB585339A GB525483A GB 525483 A GB525483 A GB 525483A GB 585339 A GB585339 A GB 585339A GB 585339 A GB585339 A GB 585339A GB 525483 A GB525483 A GB 525483A
Authority
GB
United Kingdom
Prior art keywords
thermal switch
switch apparatus
electric fire
fire alarms
winfield
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
GB585339A
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 GB585339A priority Critical patent/GB525483A/en
Publication of GB525483A publication Critical patent/GB525483A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
    • G01K3/10—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values in respect of time, e.g. reacting only to a quick change of temperature
    • G01K3/12—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values in respect of time, e.g. reacting only to a quick change of temperature based upon expansion or contraction of materials

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

525,483. Thermal switches. WINFIELD, E. Feb. 22, 1939, No. 5853. [Class 38 (v)] A sudden rise in surrounding temperature such as due to an outbreak of fire causes uneven heating of adjustably mounted bimetallic spirals 7, 8, the latter being screened, thus tilting a mercury switch 6 to sound an alarm.
GB585339A 1939-02-22 1939-02-22 Improvements in and connected with thermal switch apparatus for electric fire alarms Expired GB525483A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB585339A GB525483A (en) 1939-02-22 1939-02-22 Improvements in and connected with thermal switch apparatus for electric fire alarms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB585339A GB525483A (en) 1939-02-22 1939-02-22 Improvements in and connected with thermal switch apparatus for electric fire alarms

Publications (1)

Publication Number Publication Date
GB525483A true GB525483A (en) 1940-08-29

Family

ID=9803849

Family Applications (1)

Application Number Title Priority Date Filing Date
GB585339A Expired GB525483A (en) 1939-02-22 1939-02-22 Improvements in and connected with thermal switch apparatus for electric fire alarms

Country Status (1)

Country Link
GB (1) GB525483A (en)

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