GB674520A - Improvements in or relating to electric circuit breakers embodying overload trip devices - Google Patents

Improvements in or relating to electric circuit breakers embodying overload trip devices

Info

Publication number
GB674520A
GB674520A GB25580/50A GB2558050A GB674520A GB 674520 A GB674520 A GB 674520A GB 25580/50 A GB25580/50 A GB 25580/50A GB 2558050 A GB2558050 A GB 2558050A GB 674520 A GB674520 A GB 674520A
Authority
GB
United Kingdom
Prior art keywords
bimetal
tripping
circuit breakers
relating
armature
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
GB25580/50A
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.)
Westinghouse Electric International Co
Original Assignee
Westinghouse Electric International 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 Westinghouse Electric International Co filed Critical Westinghouse Electric International Co
Publication of GB674520A publication Critical patent/GB674520A/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
    • H01H71/40—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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427—Adjusting only the electrothermal mechanism

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Breakers (AREA)

Abstract

674,520. Automatic circuit breakers. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Oct. 20, 1950. [Dec, 10, 1949] No. 25580/50. Class 38 (v). A thermally or magnetically trippable switch has a movable contact 23 controlled by a dead-centre spring toggle which may be manually operated and is normally held by a spring-pressed latch 73, which is itself held in latching position by a part 93 of a trip bar 87, as in Specification 611,817, the bar being moved to trip the switch by a resilient member 107 anchored at 102 to the base with a bimetal member 101. parallel thereto. On a persistent overload up to e.g. 1,000 per cent load current, the bimetal deflects to the left and an adjustable screw 105 thereon engages the turned-back end 109 of member 107 to cause tripping. The bimetal member 101 carries a magnet yoke 113 and the member 107 an armature 115 so that on a severe overload, e.g. over 1,000 per cent load current, the armature is attracted to cause instantaneous tripping without movement of the bimetal. In a modification, Fig. 2, the resilient member 125 carries the latch 131 and is moved to the right for tripping on deflection of bimetal member 117 which engages an adjustable screw 139 on the end of member 125.
GB25580/50A 1949-12-10 1950-10-20 Improvements in or relating to electric circuit breakers embodying overload trip devices Expired GB674520A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US132342A US2588497A (en) 1949-12-10 1949-12-10 Circuit breaker

Publications (1)

Publication Number Publication Date
GB674520A true GB674520A (en) 1952-06-25

Family

ID=22453576

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25580/50A Expired GB674520A (en) 1949-12-10 1950-10-20 Improvements in or relating to electric circuit breakers embodying overload trip devices

Country Status (4)

Country Link
US (1) US2588497A (en)
BE (1) BE499918A (en)
FR (1) FR1030716A (en)
GB (1) GB674520A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1149803B (en) * 1961-06-27 1963-06-06 Licentia Gmbh Circuit breaker with thermal and magnetic overcurrent release
GB2227606A (en) * 1988-12-15 1990-08-01 Chance Co Ab Latch and trip mechanism

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2673908A (en) * 1951-12-29 1954-03-30 Ite Circuit Breaker Ltd Instantaneous trip circuit breaker
US2876308A (en) * 1953-08-19 1959-03-03 Fed Electric Prod Co Circuit breakers

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2027238A (en) * 1930-11-26 1936-01-07 Westinghouse Electric & Mfg Co Circuit breaker
DE616133C (en) * 1932-03-23 1935-07-20 Siemens Schuckertwerke Akt Ges Electric switch with electromagnetic and electrothermal release and momentary switching on and off by means of a snap spring mechanism
US2035743A (en) * 1934-03-29 1936-03-31 Bulldog Electric Prod Co Circuit breaker
US2184372A (en) * 1937-01-27 1939-12-26 Gen Electric Circuit breaker
US2328458A (en) * 1940-11-07 1943-08-31 Square D Co Circuit breaker
US2360684A (en) * 1941-10-30 1944-10-17 Westinghouse Electric & Mfg Co Circuit breaker
US2416163A (en) * 1942-10-30 1947-02-18 Westinghouse Electric Corp Shockproof circuit breaker
US2439511A (en) * 1944-04-10 1948-04-13 Frank Adam Electric Co Latching or tripping mechanism of circuit breakers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1149803B (en) * 1961-06-27 1963-06-06 Licentia Gmbh Circuit breaker with thermal and magnetic overcurrent release
GB2227606A (en) * 1988-12-15 1990-08-01 Chance Co Ab Latch and trip mechanism
GB2227606B (en) * 1988-12-15 1992-11-25 Chance Co Ab Sensitive latch and trip mechanism

Also Published As

Publication number Publication date
FR1030716A (en) 1953-06-16
BE499918A (en)
US2588497A (en) 1952-03-11

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