GB687294A - Improvements in thermally operated electric switches or relays - Google Patents

Improvements in thermally operated electric switches or relays

Info

Publication number
GB687294A
GB687294A GB1477150A GB1477150A GB687294A GB 687294 A GB687294 A GB 687294A GB 1477150 A GB1477150 A GB 1477150A GB 1477150 A GB1477150 A GB 1477150A GB 687294 A GB687294 A GB 687294A
Authority
GB
United Kingdom
Prior art keywords
wire
relays
june
electric switches
operated electric
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
GB1477150A
Inventor
John Edward Sherlock
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.)
British Thermostat Co Ltd
Original Assignee
British Thermostat Co Ltd
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 British Thermostat Co Ltd filed Critical British Thermostat Co Ltd
Priority to GB1477150A priority Critical patent/GB687294A/en
Publication of GB687294A publication Critical patent/GB687294A/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
    • H01H37/46—Thermally-sensitive members actuated due to expansion or contraction of a solid
    • H01H37/50—Thermally-sensitive members actuated due to expansion or contraction of a solid with extensible wires under tension

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Resistance Heating (AREA)

Abstract

687,294. Thermal switches. BRITISH THERMOSTAT CO., Ltd. June 12, 1951 [June 13, 1950], No. 14771/50. Class 38(v) In a switch, such as that of Specification 615,948, the wire 9 is wholly or partly surrounded by a heat and electrically insulating member 11 in order to vary the response of the wire to the current passing through it. As shown, the member 11 which may be of ceramic material is supported by a clip 12 and also encloses an auxiliary heater coil 10 connected in series with the wire 9, thus enabling a greater extension of the wire to be obtained and permitting the use of smaller currents. In a modification, Fig. 3 (not.shown), the auxiliary heater is on the outside of a glass member and in a further modification, Fig. 4 (not shown), nearly all of the wire is enclosed by two glass members, without an auxiliary heating coil, so that the heating and cooling times of the wire are increased.
GB1477150A 1950-06-13 1950-06-13 Improvements in thermally operated electric switches or relays Expired GB687294A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1477150A GB687294A (en) 1950-06-13 1950-06-13 Improvements in thermally operated electric switches or relays

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1477150A GB687294A (en) 1950-06-13 1950-06-13 Improvements in thermally operated electric switches or relays

Publications (1)

Publication Number Publication Date
GB687294A true GB687294A (en) 1953-02-11

Family

ID=10047194

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1477150A Expired GB687294A (en) 1950-06-13 1950-06-13 Improvements in thermally operated electric switches or relays

Country Status (1)

Country Link
GB (1) GB687294A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174015A (en) * 1962-06-01 1965-03-16 Tung Sol Electric Inc Thermoresponsive snap switch having separate ceramic heater means
DE2744963A1 (en) * 1977-10-06 1979-04-19 Kostal Fa Leopold Vehicle headlamp dipping switch mechanism - has a snap-action contact spring operated by slide and opposing contact springs bent at ends for reduced chatter
EP0145204A1 (en) * 1983-10-27 1985-06-19 Armada Corporation Bistable shape memory effect electrothermal transducers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174015A (en) * 1962-06-01 1965-03-16 Tung Sol Electric Inc Thermoresponsive snap switch having separate ceramic heater means
DE2744963A1 (en) * 1977-10-06 1979-04-19 Kostal Fa Leopold Vehicle headlamp dipping switch mechanism - has a snap-action contact spring operated by slide and opposing contact springs bent at ends for reduced chatter
EP0145204A1 (en) * 1983-10-27 1985-06-19 Armada Corporation Bistable shape memory effect electrothermal transducers

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