GB993285A - Automatic electric circuit breakers - Google Patents

Automatic electric circuit breakers

Info

Publication number
GB993285A
GB993285A GB42189/62A GB4218962A GB993285A GB 993285 A GB993285 A GB 993285A GB 42189/62 A GB42189/62 A GB 42189/62A GB 4218962 A GB4218962 A GB 4218962A GB 993285 A GB993285 A GB 993285A
Authority
GB
United Kingdom
Prior art keywords
bimetal
strip
circuit
breaker
nov
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
GB42189/62A
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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
Priority claimed from US152395A external-priority patent/US3240903A/en
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB993285A publication Critical patent/GB993285A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
    • H01H71/524—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism the contact arm being pivoted on handle and mechanism spring acting between cradle and contact arm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/162—Electrothermal mechanisms with bimetal element with compensation for ambient temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7409—Interchangeable elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427—Adjusting only the electrothermal mechanism
    • H01H71/7436—Adjusting the position (or prestrain) of the bimetal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/12—Means for indicating condition of the switch
    • H01H73/14—Indicating lamp structurally associated with the switch

Landscapes

  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)
  • Distribution Board (AREA)

Abstract

993,285. Automatic circuit-breakers. WESTINGHOUSE ELECTRIC CORPORATION. Nov. 8, 1962 [Nov. 15, 1961], No. 42189/62. Heading H2B. On overload a latching bimetal strip 101 heats up and flexes to allow operation of the breaker mechanism 15 via a pivoted releasable member 81, strip 101 having a bimetal strip 112, which may be lanced out, projecting normally therefrom and acted upon by an adjusting screw 105 to adjust the tripping point, over - adjustment being prevented by stops for the member 107 rotating the screw 105. Bimetal 101 is heated by a plugin heater unit 61 and is compensated for ambient temperature variation when strip 112 projects in the opposite direction from bimetal 101 (Fig. 6, not shown). An operating handle structure 77 includes a U-shaped operating lever 85, pivotally supported at 87, having two U- legs 93 receiving pins on the arms of a V-shaped contact operating member 79 connected with the releasable member 81 by an over-centre spring 83. Pins 53 on member 79 engage in elongated slots 51 of movable contact plates 47 slidable into and out of bridging engagement with fixed contacts 33, 37, and rockable for self-aligning thereon. Plates 47 complete the circuit between terminals 31, 45, and the plug-in heater unit 61 connects contacts 39, 43 in the circuit. The breaker is re-set by a detachable handle 89 and is operable manually thereby. An indicator lamp 19 is protected by a removable plastic cap 157. The breaker housing comprises four sections and has mounting brackets 23. Specification 993,284 is referred to.
GB42189/62A 1961-11-15 1962-11-08 Automatic electric circuit breakers Expired GB993285A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US152395A US3240903A (en) 1961-11-15 1961-11-15 Circuit interrupter with thermal trip means
US466784A US3320380A (en) 1961-11-15 1965-06-24 Circuit interrupter with an improved contact structure

Publications (1)

Publication Number Publication Date
GB993285A true GB993285A (en) 1965-05-26

Family

ID=26849513

Family Applications (2)

Application Number Title Priority Date Filing Date
GB42189/62A Expired GB993285A (en) 1961-11-15 1962-11-08 Automatic electric circuit breakers
GB42188/62A Expired GB993284A (en) 1961-11-15 1962-11-08 Electric circuit breakers

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB42188/62A Expired GB993284A (en) 1961-11-15 1962-11-08 Electric circuit breakers

Country Status (2)

Country Link
US (1) US3320380A (en)
GB (2) GB993285A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4233482A (en) * 1977-02-28 1980-11-11 Gould Inc. Enclosed fused disconnect switch
US4340791A (en) * 1979-05-14 1982-07-20 Carlingswitch, Inc. Environmentally sealed rocker switch
US4242551A (en) * 1979-05-14 1980-12-30 Carlingswitch, Inc. Environmentally sealed rocker switch

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1853752A (en) * 1930-02-07 1932-04-12 Wadsworth Electric Mfg Co Quick acting switch
US2103070A (en) * 1933-03-06 1937-12-21 Bulldog Electric Prod Co Circuit breaker
US2037544A (en) * 1933-08-17 1936-04-14 Gen Electric Circuit breaker contact
US2109378A (en) * 1936-07-08 1938-02-22 Arrow Hart & Hegeman Electric Snap switch
US2285887A (en) * 1941-07-10 1942-06-09 Monowatt Electric Corp Push button circuit closer

Also Published As

Publication number Publication date
US3320380A (en) 1967-05-16
GB993284A (en) 1965-05-26

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