GB788044A - Automatic electric circuit breaker - Google Patents

Automatic electric circuit breaker

Info

Publication number
GB788044A
GB788044A GB16525/56A GB1652556A GB788044A GB 788044 A GB788044 A GB 788044A GB 16525/56 A GB16525/56 A GB 16525/56A GB 1652556 A GB1652556 A GB 1652556A GB 788044 A GB788044 A GB 788044A
Authority
GB
United Kingdom
Prior art keywords
armature
yoke
strip
lever
welded
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
GB16525/56A
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.)
Schneider Electric USA Inc
Original Assignee
Square D 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
Priority claimed from US514222A external-priority patent/US3098136A/en
Application filed by Square D Co filed Critical Square D Co
Publication of GB788044A publication Critical patent/GB788044A/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
    • H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker
    • 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
    • H01H71/1009—Interconnected mechanisms
    • H01H71/1027—Interconnected mechanisms comprising a bidirectional connecting member actuated by the opening movement of one pole to trip a neighbour pole
    • 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
    • H01H71/10—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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms
    • H01H71/405—Combined electrothermal and electromagnetic mechanisms in which a bimetal forms the inductor for the electromagnetic mechanism
    • 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)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

788,044. Automatic circuit - breakers. SQUARE D CO. May 29, 1956 [June 9, 1955], No. 16525/56. Class 38 (5). A manually - operable automatic circuitbreaker comprises an operating lever 35 pivoted. at 38 and having a pair of limbs 36 with recesses 37 for the limbs of a contact-carrying lever 41. A spring 43 anchored between the latter and a normally-fixed lever 31 pivoted at 32, imparts a snap-action opening and closing movement to the contacts and holds the end 34 of lever 31 in engagement with the latch surface 25 of a trip assembly. The latter comprises a series bimetal strip 11 welded to a connector 4, a magnetic yoke 12 welded to the strip at 13, and an armature 17 pivoted on lugs 16 of the yoke 12. An extension 21 of the armature 17 fits into a spring 22 so as to bias the armature away from the yoke to the extent allowed by an ambient temperature compensating bimetal strip 23 which is welded to the armature 17 and engages a projection 15 of the yoke 12. One end of a braid 14 is welded between points 13 to the yoke 12 and strip 11 and carries current to the movable contact lever 41. Heating of the strip 11 moves the assembly 6 in an anti-clockwise direction and, at the set value, releases catch 34 from a window 18 in the armature 17. Under heavy current fault conditions the magnetic effect of the current in strip 11 attracts the armature 17 to yoke 12 and again releases the catch 34. The end of the bimetal strip 23 may be bent over at 25, into the window 18, to form a latching surface for the catch 34, or a latch piece 61 may be placed in the window 18, Fig. 5.
GB16525/56A 1955-05-18 1956-05-29 Automatic electric circuit breaker Expired GB788044A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US509135A US2902560A (en) 1955-05-18 1955-05-18 Circuit breaker
US514222A US3098136A (en) 1955-06-09 1955-06-09 Circuit breaker
US893282XA 1958-06-24 1958-06-24

Publications (1)

Publication Number Publication Date
GB788044A true GB788044A (en) 1957-12-18

Family

ID=31982228

Family Applications (4)

Application Number Title Priority Date Filing Date
GB7597/56A Expired GB827733A (en) 1955-05-18 1956-03-12 Improvements in or relating to automatic electric circuit breakers
GB15702/56A Expired GB827740A (en) 1955-05-18 1956-05-22 Electric overload circuit breaker
GB16525/56A Expired GB788044A (en) 1955-05-18 1956-05-29 Automatic electric circuit breaker
GB31479/58A Expired GB893282A (en) 1955-05-18 1958-10-02 Improvements in or relating to trip devices for automatic electric circuit breakers

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB7597/56A Expired GB827733A (en) 1955-05-18 1956-03-12 Improvements in or relating to automatic electric circuit breakers
GB15702/56A Expired GB827740A (en) 1955-05-18 1956-05-22 Electric overload circuit breaker

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB31479/58A Expired GB893282A (en) 1955-05-18 1958-10-02 Improvements in or relating to trip devices for automatic electric circuit breakers

Country Status (2)

Country Link
US (1) US2902560A (en)
GB (4) GB827733A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1291817B (en) * 1962-05-21 1969-04-03 Fed Pacific Electric Co Magnetic and thermal overcurrent release device for a multi-pole circuit breaker

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061698A (en) * 1955-05-18 1962-10-30 Square D Co Spring operated mechanism for electric circuit breakers
US3178535A (en) * 1957-04-12 1965-04-13 Westinghouse Electric Corp Automatic circuit breaker with improved bimetallic and electromagnetic trip device
US3088008A (en) * 1959-11-03 1963-04-30 Westinghouse Electric Corp Circuit breaker
US3110786A (en) * 1959-11-03 1963-11-12 Westinghouse Electric Corp Electromagnetic thermal current circuit breaker
NL126952C (en) * 1960-01-07
US3134000A (en) * 1960-10-14 1964-05-19 Square D Co Electric circuit breaker with tandem arranged mechanisms
US3147353A (en) * 1960-12-23 1964-09-01 Ite Circuit Breaker Ltd Contact weld breaking means
US3156796A (en) * 1961-07-31 1964-11-10 Ite Circuit Breaker Ltd High sensitivity thermomagnetic circuit breaker
US3213327A (en) * 1962-04-03 1965-10-19 Fed Pacific Electric Co Circuit breaker and panelboard
GB1031971A (en) * 1964-03-13 1966-06-02 Square D Co Improvements in or relating to electric circuit breakers
US3278707A (en) * 1964-10-22 1966-10-11 Gen Electric Circuit breaker with ambient-temperature compensating means
US3287522A (en) * 1965-06-28 1966-11-22 Gen Electric Circuit breaker with spring-biased toggle link
US3466578A (en) * 1967-06-26 1969-09-09 Ite Imperial Corp Circuit breaker contact separation initiator
US3488610A (en) * 1967-09-21 1970-01-06 Gen Electric Circuit breaker with improved thermalmagnetic tripping mechanism
US3464040A (en) * 1967-09-21 1969-08-26 Gen Electric Compact circuit breaker construction
US3743981A (en) * 1972-09-13 1973-07-03 Ceb Ltd Circuit breaker
US3860898A (en) * 1973-09-11 1975-01-14 Westinghouse Electric Corp Circuit breaker for distribution transformer
US3832663A (en) * 1973-11-28 1974-08-27 Westinghouse Electric Corp Circuit breaker with improved frame and cradle support means
US3950715A (en) * 1974-10-29 1976-04-13 Fuchs Electrical Industries Circuit breaker with improved trip means
US4479101A (en) * 1982-07-02 1984-10-23 Siemens-Allis, Inc. Circuit breaker with self-adjusting armature
US4616199A (en) * 1984-12-21 1986-10-07 Square D Company Circuit breaker improvement to prevent setting of trip assembly
US4868529A (en) * 1988-08-24 1989-09-19 Siemens Energy & Automation, Inc. Circuit breaker armature latch with control leg
US5173674A (en) * 1992-02-25 1992-12-22 General Electric Company Thermal-magnetic trip unit with low current response
US5250918A (en) * 1992-05-05 1993-10-05 Square D Company Automatic miniature circuit breaker with Z-axis assemblage current response mechanism
JPH05342967A (en) * 1992-06-04 1993-12-24 Mitsubishi Electric Corp Circuit breaker
US5381120A (en) * 1993-11-15 1995-01-10 General Electric Company Molded case circuit breaker thermal-magnetic trip unit
IE80609B1 (en) * 1994-01-21 1998-10-21 Square D Co Improvements in and relating to circuit breakers
US5471184A (en) * 1994-07-13 1995-11-28 Eaton Corporation Circuit breaker
US6617963B1 (en) 1999-02-26 2003-09-09 Sri International Event-recording devices with identification codes
US7034660B2 (en) * 1999-02-26 2006-04-25 Sri International Sensor devices for structural health monitoring
US6806808B1 (en) 1999-02-26 2004-10-19 Sri International Wireless event-recording device with identification codes
US6801111B2 (en) * 2002-08-21 2004-10-05 Square D Company Latch for an electrical device

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2329362A (en) * 1934-04-14 1943-09-14 Westinghouse Electric & Mfg Co Circuit breaker
US2102545A (en) * 1936-05-09 1937-12-14 Trumbull Electric Mfg Co Electric switch
US2209351A (en) * 1937-07-06 1940-07-30 Colt S Mfg Co Automatic circuit breaker
US2210262A (en) * 1939-02-27 1940-08-06 Colt S Mfg Co Automatic circuit breaker
US2318085A (en) * 1940-09-19 1943-05-04 Westinghouse Electric & Mfg Co Circuit breaker
US2449486A (en) * 1945-03-15 1948-09-14 Westinghouse Electric Corp Circuit breaker
US2656432A (en) * 1945-05-07 1953-10-20 Westinghouse Electric Corp Circuit breaker
US2624816A (en) * 1945-05-09 1953-01-06 Westinghouse Electric Corp Circuit breaker
US2627563A (en) * 1950-08-16 1953-02-03 Gen Electric Electric circuit breaker
US2661414A (en) * 1951-03-09 1953-12-01 Gen Electric Electric circuit breaker
US2666114A (en) * 1951-03-24 1954-01-12 Square D Co Circuit breaker
US2678359A (en) * 1952-01-15 1954-05-11 Ite Circuit Breaker Ltd Trip mechanism of circuit breakers
US2677025A (en) * 1952-05-02 1954-04-27 Westinghouse Electric Corp Circuit breaker
US2701284A (en) * 1953-05-28 1955-02-01 Ite Circuit Breaker Ltd Latch insulation for quick break circuit breakers
US2716679A (en) * 1954-05-11 1955-08-30 Wadsworth Electric Mfg Co Circuit breaker
US2797278A (en) * 1954-10-29 1957-06-25 Westinghouse Electric Corp Circuit breaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1291817B (en) * 1962-05-21 1969-04-03 Fed Pacific Electric Co Magnetic and thermal overcurrent release device for a multi-pole circuit breaker

Also Published As

Publication number Publication date
GB827740A (en) 1960-02-10
US2902560A (en) 1959-09-01
GB827733A (en) 1960-02-10
GB893282A (en) 1962-04-04

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