GB994368A - Improvements in electric circuit breaker - Google Patents

Improvements in electric circuit breaker

Info

Publication number
GB994368A
GB994368A GB34418/61A GB3441861A GB994368A GB 994368 A GB994368 A GB 994368A GB 34418/61 A GB34418/61 A GB 34418/61A GB 3441861 A GB3441861 A GB 3441861A GB 994368 A GB994368 A GB 994368A
Authority
GB
United Kingdom
Prior art keywords
armature
cam
shaft
nut
casing
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
GB34418/61A
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.)
General Electric Co
Original Assignee
General Electric 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 General Electric Co filed Critical General Electric Co
Publication of GB994368A publication Critical patent/GB994368A/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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7463—Adjusting only the electromagnetic mechanism

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Abstract

994,368. Automatic circuit-breakers. GENERAL ELECTRIC CO. Sept. 26, 1961 [Oct. 12, 1960], No. 34418/61. Heading H2B. In an electromagnetic tripping device of an oil circuit-breaker a pivoted armature is provided with a cam follower which is biased against a cam to determine the inoperative position of the armature and the cam is adjustable towards and away from the armature pivot in a direction which is parallel to the face of the cam follower in a predetermined position thereof, so as to alter the range of adjustment provided by the cam without altering the setting at the predetermined position. As shown, the cam 32 is fixed on a threaded shaft 36 screwed into a nut 34 accessible from outside the casing 14. In the position shown in Fig. 4, the cam follower face 25 of the armature 24 is parallel to the axis of the shaft 33 so that when the nut 34 is turned whilst the shaft 33 is held against rotation the cam is moved up or down without moving the armature. A slot 36 in the end of the shaft 33 can receive a screw-driver to hold it against rotation and also indicates the position of the cam. A cap 38 is inserted in the nut 34 when the tripping range has been set. The armature assembly 34 co-operates with a trip-bar 19 which normally retains a release lever 8 which is released when the armature is attracted to a U-shaped core 22 secured about a conductor 17 in the casing 14. The armature biasing spring 27 is adjustable by means of a screw 30 and lever 28 pivoted on a knife edge in casing aperture 29.
GB34418/61A 1960-10-12 1961-09-26 Improvements in electric circuit breaker Expired GB994368A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US62184A US3084236A (en) 1960-10-12 1960-10-12 Electric circuit breaker

Publications (1)

Publication Number Publication Date
GB994368A true GB994368A (en) 1965-06-02

Family

ID=22040749

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34418/61A Expired GB994368A (en) 1960-10-12 1961-09-26 Improvements in electric circuit breaker

Country Status (4)

Country Link
US (1) US3084236A (en)
DE (1) DE1187720C2 (en)
FR (1) FR1303278A (en)
GB (1) GB994368A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3181041A (en) * 1963-02-19 1965-04-27 Gen Electric Circuit breaker with magnetic trip adjusting means
US3391361A (en) * 1966-12-05 1968-07-02 Gen Electric Adjustable current-responsive device
US3575679A (en) * 1968-02-06 1971-04-20 Westinghouse Electric Corp Circuit breaker with improved trip adjustment means
US3826951A (en) * 1973-01-30 1974-07-30 Westinghouse Electric Corp Circuit breaker with replaceable rating adjuster and interlock means
GB1466258A (en) * 1973-10-04 1977-03-02 Dorman Smith Switchgear Ltd Electrical circuit breakers
US4023132A (en) * 1973-10-04 1977-05-10 Dorman Smith Switchgear Limited Electrical circuit breakers
GB1466259A (en) * 1973-10-04 1977-03-02 Dorman Smith Switchgear Ltd Electric circuit breakers
US3831120A (en) * 1973-11-08 1974-08-20 Gen Electric Trip unit having improved trip adjustment indicator and circuit breaker incorporating same
FR2349207A1 (en) * 1976-04-21 1977-11-18 Unelec INTERCHANGEABLE TRIGGER FOR CIRCUIT BREAKER
US6806478B1 (en) 1999-03-16 2004-10-19 Cryovac, Inc. Authentication system and methodology
US7592888B2 (en) * 2006-07-14 2009-09-22 Jason Robert Colsch Low cost user adjustment, resistance to straying between positions, increased resistance to ESD, and consistent feel
DE102014203661B4 (en) * 2014-02-28 2021-02-04 Siemens Aktiengesellschaft Button element and slide element of an adjusting device as well as adjusting device and method for adjusting a position of a thermal release shaft

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR585629A (en) * 1923-09-12 1925-03-04 Siemens Schuckertwerke Gmbh Device for adjusting the operating current of alternating current magnets, especially for interrupting magnets with excessive current, for relays, etc.
DE539837C (en) * 1927-07-15 1931-12-02 Aeg Overcurrent magnet with an adjustable armature retraction force (fine adjustment) and with a variable magnetic resistance (coarse adjustment)
DE519338C (en) * 1929-05-09 1931-02-26 Bergmann Elek Citaets Werke Ak Electromagnetic overcurrent release with a device for setting different tripping currents
FR800736A (en) * 1935-01-18 1936-07-17 Stotz Kontakt Gmbh Electromagnetic circuit breaker
BE426421A (en) * 1937-03-02
US2268340A (en) * 1940-10-18 1941-12-30 Evarts G Loomis Fluid pressure control device
US2586326A (en) * 1945-02-27 1952-02-19 Westinghouse Electric Corp Circuit interrupter trip device
US2491959A (en) * 1946-01-18 1949-12-20 Westinghouse Electric Corp Automatic trip circuit breaker
DE827821C (en) * 1950-01-21 1952-01-14 Voigt & Haeffner Ag Instantaneous magnetic overcurrent release
US2673264A (en) * 1952-04-17 1954-03-23 Fed Electric Prod Co Circuit breaker with adjustable thermal and magnetic controls
NL99816C (en) * 1953-05-08 1961-08-17
US2884497A (en) * 1957-08-22 1959-04-28 Gen Electric Circuit breaker

Also Published As

Publication number Publication date
DE1187720C2 (en) 1973-01-04
FR1303278A (en) 1962-09-07
DE1187720B (en) 1973-01-04
US3084236A (en) 1963-04-02

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