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GB648983A - An electric thermo-switch for fire alarm systems - Google Patents

An electric thermo-switch for fire alarm systems

Info

Publication number
GB648983A
GB648983A GB34901/47A GB3490147A GB648983A GB 648983 A GB648983 A GB 648983A GB 34901/47 A GB34901/47 A GB 34901/47A GB 3490147 A GB3490147 A GB 3490147A GB 648983 A GB648983 A GB 648983A
Authority
GB
United Kingdom
Prior art keywords
switch
fire alarm
alarm systems
electric thermo
thermo
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
GB34901/47A
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.)
DANSK TELEFONALARM AKTIESELSKA
Original Assignee
DANSK TELEFONALARM AKTIESELSKA
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 DANSK TELEFONALARM AKTIESELSKA filed Critical DANSK TELEFONALARM AKTIESELSKA
Publication of GB648983A publication Critical patent/GB648983A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/56—Thermally-sensitive members actuated due to deflection of bimetallic element having spirally wound or helically wound bimetallic element
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K5/00—Measuring temperature based on the expansion or contraction of a material
    • G01K5/48—Measuring temperature based on the expansion or contraction of a material the material being a solid
    • G01K5/56—Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid
    • G01K5/62—Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid the solid body being formed of compounded strips or plates, e.g. bimetallic strip

Landscapes

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

Abstract

648,983. Thermal switches. DANSK TELEFONALARM AKTIESELSKAB. Dec. 30, 1947, No. 34901. Convention date, April 25, 1946. Addition to 647,359. [Class 38(v)] The thermal switch, of the parent Specification is modified in that the armature 18 is supported at or near its centre of gravity by two springs 19, 21, one or both of which may be adjustable.
GB34901/47A 1946-04-25 1947-12-30 An electric thermo-switch for fire alarm systems Expired GB648983A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK648983X 1946-04-25

Publications (1)

Publication Number Publication Date
GB648983A true GB648983A (en) 1951-01-17

Family

ID=8152009

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34901/47A Expired GB648983A (en) 1946-04-25 1947-12-30 An electric thermo-switch for fire alarm systems

Country Status (1)

Country Link
GB (1) GB648983A (en)

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