GB696269A - An improved thermally-operated electric switch - Google Patents

An improved thermally-operated electric switch

Info

Publication number
GB696269A
GB696269A GB27861/51A GB2786151A GB696269A GB 696269 A GB696269 A GB 696269A GB 27861/51 A GB27861/51 A GB 27861/51A GB 2786151 A GB2786151 A GB 2786151A GB 696269 A GB696269 A GB 696269A
Authority
GB
United Kingdom
Prior art keywords
contacts
spring
wire
lever
pairs
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
GB27861/51A
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.)
Motors Liquidation Co
Original Assignee
Motors Liquidation Co
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 Motors Liquidation Co filed Critical Motors Liquidation Co
Publication of GB696269A publication Critical patent/GB696269A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00Electrothermal relays
    • H01H61/002Structural combination of a time delay electrothermal relay with an electrothermal protective relay, e.g. a start relay
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches

Landscapes

  • Breakers (AREA)
  • Push-Button Switches (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)

Abstract

696,269. Thermal switches. GENERAL MOTORS CORPORATION. Nov. 28, 1951 [Dec. 15, 1950], No. 27861/51. Class 38 (v) In a switch suitable for controlling split phase motors heating of a wire 50 by current passing through it allows a spring-biased lever 40 to rotate counter clockwise so that notches 56, 55 in the lever successively carry the ends of bowed springs 60, 61, formed respectively by tongues of contact springs 32, 33, past dead centre positions causing contacts 37 and 38 to snap successively upwards out of engagement with contacts 21, 22. The lever 40 may be carried by a blade spring 34 fixed in place together with the springs 32, 33 by a rivet 35, the spring 34 bearing the lever 40 downwards. The current through the wire 50 passes in parallel through the two pairs of contacts and the breaking of the one circuit at 37, 21 may reduce the current in the wire so that the contacts 38, 22 remain closed. Assuming however that both pairs of contacts are opened and that the wire 50 begins to cool. The contact 37 will first tend to close due to its tongue 60 passing through a dead-centre position but this movement is prevented by the end 66 of the spring 33 which now bears against the spring 32. Eventually both pairs of contacts snap simultaneously into the closed position. Specifications 532,576 and 591,634 are referred to.
GB27861/51A 1950-12-15 1951-11-28 An improved thermally-operated electric switch Expired GB696269A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US200976A US2616005A (en) 1950-12-15 1950-12-15 Electric switch

Publications (1)

Publication Number Publication Date
GB696269A true GB696269A (en) 1953-08-26

Family

ID=22743961

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27861/51A Expired GB696269A (en) 1950-12-15 1951-11-28 An improved thermally-operated electric switch

Country Status (4)

Country Link
US (1) US2616005A (en)
DE (2) DE1674630U (en)
FR (1) FR1046340A (en)
GB (1) GB696269A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE967957C (en) * 1955-03-03 1958-01-02 Marquardt J & J Snap-action switch for briefly switching two or more electrical circuits in a common switch housing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2242769A (en) * 1938-02-17 1941-05-20 Gen Motors Corp Switch
US2278990A (en) * 1941-10-21 1942-04-07 Gen Electric Thermal switch

Also Published As

Publication number Publication date
US2616005A (en) 1952-10-28
FR1046340A (en) 1953-12-04
DE1674630U (en) 1954-04-08
DE901073C (en) 1954-01-07

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