GB905773A - Electric circuit breaker - Google Patents

Electric circuit breaker

Info

Publication number
GB905773A
GB905773A GB34844/60A GB3484460A GB905773A GB 905773 A GB905773 A GB 905773A GB 34844/60 A GB34844/60 A GB 34844/60A GB 3484460 A GB3484460 A GB 3484460A GB 905773 A GB905773 A GB 905773A
Authority
GB
United Kingdom
Prior art keywords
bimetal
armature
stop
trip member
gap
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
GB34844/60A
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 US850650A external-priority patent/US3088008A/en
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB905773A publication Critical patent/GB905773A/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
    • H01H71/12—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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0221—Majority of parts mounted on central frame or wall
    • 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
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

905,773. Automatic circuit-breakers. WESTINGHOUSE ELECTRIC CORPORATION. Oct. 11, 1960 [Nov. 3, 1959], No. 34844/60. Class 38 (5). In a circuit-breaker the tripping device includes an armature movable to release a trip member; a magnet having a small air gap from the armature sufficient to effect release of the trip member, a current responsive bimetal connected to move the armature, and a stop against which the bimetal is normally stressed so that low overload currents heat the bimetal to first relieve the stress without armature movement and then move the armature so as to release the trip member. As shown in a circuitbreaker otherwise similar to that described with reference to Fig. 9 of Specification 905,772, the trip member 79 (Fig. 1) engages latch surface 85 on the armature 86 having two L-shaped projections 121 which rest on shoulder portions of the bimetal 97 forming a pivotal mounting. The bimetal 97 is secured to a projection 101 of the frame 25 and is acted upon by a compensating bimetal 130. A U-shaped magnet yoke 117 has a projection 129 welded to the bimetal 97 and a spring 119 is supported between the yoke and bimetal to bias the armature 86 counterclockwise against a stop 148 on the trip member 79. The air gap 139 between the yoke 117 and armature 86 is maintained constant under normal load conditions since the bimetal is stressed due to the engagement of a stamped projection 143 of the bimetal 97 with a stop 141 on the trip member 79, and owing to the stop 148 there will be a small gap 144 between a tail 125 of the armature and the end of the bimetal 97. On the occurrance of overload sufficient to relieve the stress in the bimetal and move its end anticlockwise, the gap 144 is closed and the gap 139 enlarged before the armature moves with the bimetal to release the trip member 79. If a constant gap 139 is required the tail 125 may be arranged to engage the bimetal end when the armature engages the stop 148, or alternatively (Fig. 12, not shown), the stop 148 may be omitted. In an alternative arrangement (Fig. 7) the armature 86<SP>1</SP> is biased by a U-shaped spring 145 and the constant relative positions of the bimetal 97<SP>1</SP> and trip member 79<SP>1</SP> are determined by the engagement of a projection 147 of the yoke 117<SP>1</SP> and a stop face 149 on the member 79<SP>1</SP>.
GB34844/60A 1959-11-03 1960-10-11 Electric circuit breaker Expired GB905773A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US850650A US3088008A (en) 1959-11-03 1959-11-03 Circuit breaker
US850651A US3110786A (en) 1959-11-03 1959-11-03 Electromagnetic thermal current circuit breaker

Publications (1)

Publication Number Publication Date
GB905773A true GB905773A (en) 1962-09-12

Family

ID=27126944

Family Applications (2)

Application Number Title Priority Date Filing Date
GB34697/60A Expired GB905772A (en) 1959-11-03 1960-10-10 Electric circuit breaker
GB34844/60A Expired GB905773A (en) 1959-11-03 1960-10-11 Electric circuit breaker

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB34697/60A Expired GB905772A (en) 1959-11-03 1960-10-10 Electric circuit breaker

Country Status (3)

Country Link
US (1) US3110786A (en)
FR (2) FR1272437A (en)
GB (2) GB905772A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3292118A (en) * 1964-12-21 1966-12-13 Cutler Hammer Inc Circuit breakers with improved trip mechanisms
US3287522A (en) * 1965-06-28 1966-11-22 Gen Electric Circuit breaker with spring-biased toggle link
FR2177433B1 (en) * 1971-12-02 1976-09-17 Legrand Sa
US3959754A (en) * 1974-09-25 1976-05-25 Westinghouse Electric Corporation Circuit breaker with improved trip means
US4616200A (en) * 1984-09-12 1986-10-07 Square D Company Circuit breaker
ZA885255B (en) * 1987-04-21 1989-04-26 Circuit Breaker Ind An electric circuit breaker
US7391289B2 (en) 2004-08-03 2008-06-24 Siemens Energy & Automation, Inc. Systems, methods, and device for actuating a circuit breaker
DE102006027812A1 (en) * 2006-06-16 2007-12-20 Siemens Ag Circuit breaker and magnetic yoke for a circuit breaker
CN101620958B (en) * 2009-05-11 2011-07-20 江苏辉能电气有限公司 Quick-tripping device of low-voltage circuit breaker
US8729988B1 (en) * 2013-03-13 2014-05-20 Eaton Corporation Trip device support frame and top frame calibration method
US8872606B1 (en) 2013-04-23 2014-10-28 Eaton Corporation Bimetal and magnetic armature providing an arc splatter resistant offset therebetween, and circuit breaker including the same
US9412548B2 (en) * 2014-08-13 2016-08-09 Eaton Corporation Circuit breakers with handle bearing sleeves
US9620303B2 (en) 2014-08-13 2017-04-11 Eaton Corporation Circuit breakers with handle bearing pins

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1538212A (en) * 1920-09-30 1925-05-19 Kohler Co Thermostatic cut-out switch
US2100749A (en) * 1933-03-15 1937-11-30 Westinghouse Electric & Mfg Co Circuit breaker
US2131640A (en) * 1934-01-08 1938-09-27 Colt S Mfg Co Automatic circuit breaker
US2212732A (en) * 1937-03-31 1940-08-27 Lyman C Fisher Circuit breaker
USRE22218E (en) * 1937-06-18 1942-11-03 Circuit breaker
US2209351A (en) * 1937-07-06 1940-07-30 Colt S Mfg Co Automatic circuit breaker
US2426880A (en) * 1942-03-23 1947-09-02 Square D Co Circuit breaker
US2536812A (en) * 1942-03-23 1951-01-02 Square D Co Circuit breaker
GB574658A (en) * 1944-02-01 1946-01-15 Westinghouse Electric Int Co Improvements in or relating to electric overload circuit breakers
US2422508A (en) * 1943-06-25 1947-06-17 Gen Electric Circuit breaker
US2624816A (en) * 1945-05-09 1953-01-06 Westinghouse Electric Corp Circuit breaker
US2579673A (en) * 1947-09-27 1951-12-25 Square D Co Circuit breaker
US2703351A (en) * 1948-05-17 1955-03-01 Square D Co Compensator for electric circuit breakers
US2494761A (en) * 1948-05-17 1950-01-17 Square D Co Thermal-magnetic circuit breaker
US2573306A (en) * 1948-08-11 1951-10-30 Gen Electric Electric circuit breaker
US2619561A (en) * 1950-02-25 1952-11-25 Westinghouse Electric Corp Circuit breaker
US2568423A (en) * 1950-07-07 1951-09-18 Westinghouse Electric Corp Circuit breaker
US2697151A (en) * 1951-03-24 1954-12-14 Square D Co Circuit breaker
US2813167A (en) * 1953-07-21 1957-11-12 Westinghouse Electric Corp Circuit breaker
US2902560A (en) * 1955-05-18 1959-09-01 Square D Co Circuit breaker
US2934620A (en) * 1957-01-04 1960-04-26 Wadsworth Electric Mfg Co Circuit breaker

Also Published As

Publication number Publication date
FR1272437A (en) 1961-09-22
FR1272438A (en) 1961-09-22
US3110786A (en) 1963-11-12
GB905772A (en) 1962-09-12

Similar Documents

Publication Publication Date Title
GB788044A (en) Automatic electric circuit breaker
US2624816A (en) Circuit breaker
GB909165A (en) Electric circuit breaker adapted for interrupting heavy excess currents by electro-dynamic repulsion
GB905773A (en) Electric circuit breaker
US3636410A (en) Automatic molded case circuit breaker with time-delay overcurrent tripping
GB1302569A (en)
GB832948A (en) Improvements in or relating to electric circuit breakers
GB765276A (en) Improvements in or relating to automatic electric circuit breakers
GB1461813A (en) Circuit interrupter tripping device
GB1519230A (en) Overcurrent detection devices
GB869424A (en) Improvements in or relating to current interrupting devices
US2178083A (en) Circuit controlling device
GB1058485A (en) Auxiliary tripping electromagnet in combination with an automatic electric circuit breaker
GB549554A (en) Improvements in or relating to automatic electric circuit breakers
GB1516154A (en) Circuit breaker with trip means
US2840663A (en) Circuit breaker
GB591331A (en) Improvements in shock-proof mechanisms particularly for electric circuit breakers orthe like
GB904444A (en) Improvements in or relating to electric circuit breaking devices
US2813170A (en) Circuit breaker
GB886267A (en) Electric circuit breakers embodying electromagnetic release means
US2312168A (en) Circuit breaker
GB817898A (en) An electric circuit breaker
GB1053654A (en)
US2824925A (en) Electromagnetic trip circuit interrupters
GB804428A (en) Automatic electric circuit breakers