GB718984A - Improvements in or relating to apparatus for making and breaking electric circuits - Google Patents

Improvements in or relating to apparatus for making and breaking electric circuits

Info

Publication number
GB718984A
GB718984A GB6271/52A GB627152A GB718984A GB 718984 A GB718984 A GB 718984A GB 6271/52 A GB6271/52 A GB 6271/52A GB 627152 A GB627152 A GB 627152A GB 718984 A GB718984 A GB 718984A
Authority
GB
United Kingdom
Prior art keywords
arms
contacts
arm
bimetal
carried
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
GB6271/52A
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
Application filed by Square D Co filed Critical Square D Co
Publication of GB718984A publication Critical patent/GB718984A/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
    • H01H71/7427—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
    • H01H73/48—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 having both electrothermal and electromagnetic automatic release
    • H01H73/50—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 having both electrothermal and electromagnetic automatic release reset by lever

Abstract

718,984. Thermal switches; switches held set and freed mechanically. SQUARE D CO. March 11, 1952 [March 24, 1951], No. 6271/52. Class 38(5) The movable contact 9 of a switch is carried by an arm having a rigid portion 7 and a flexible portion 8 and carried by a bimetal strip 6 secured to a terminal 3. The strip 6 and arm 7 are inherently biased to hold contact 9 in engagement with a fixed contact 11. The arm 7 is embraced by the arms of a U-shaped resilient member 23, the position of the arms of which is adjustable by a screw 29 engaging a member 28 bearing on the convex bight of member 23. The contacts are manually opened by moving the dolly 18 counterclockwise from the Fig. 1 position to cause a cam 17 thereon to depress an armature 16 carried by the bimetal. Contact separation is delayed by projections 25 on the arms of member 23 until the flexible portion 8 becomes sufficiently stressed to overcome the pressure of arms 23, when the contacts snap open, the arms 23 restoring to hold the contacts open. Reverse movement of the dolly pushes a cam 22 between the ends 24 of the arms and releases the arm 7 which snaps to its closed position. The contacts are also automatically opened on a moderate prolonged overload by downward deflection of the bimetal strip 6 and on severe overload by the attraction of armature 16 by a magnetic flux in a member 27, of which member 28 forms part. In either case, the contacts are reclosed by hand. The member 23 is embraced by an ambient temperature compensating bimetal 26.
GB6271/52A 1951-03-24 1952-03-11 Improvements in or relating to apparatus for making and breaking electric circuits Expired GB718984A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US217330A US2666114A (en) 1951-03-24 1951-03-24 Circuit breaker

Publications (1)

Publication Number Publication Date
GB718984A true GB718984A (en) 1954-11-24

Family

ID=22810606

Family Applications (2)

Application Number Title Priority Date Filing Date
GB6271/52A Expired GB718984A (en) 1951-03-24 1952-03-11 Improvements in or relating to apparatus for making and breaking electric circuits
GB2312/53A Expired GB728708A (en) 1951-03-24 1953-01-27 Improvements in or relating to electric circuit breakers

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB2312/53A Expired GB728708A (en) 1951-03-24 1953-01-27 Improvements in or relating to electric circuit breakers

Country Status (3)

Country Link
US (1) US2666114A (en)
FR (2) FR1058938A (en)
GB (2) GB718984A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8305028B2 (en) 2010-03-09 2012-11-06 Nidec Motor Corporation Electric motor and switch for electric motor having arc barrier
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

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806920A (en) * 1951-03-24 1957-09-17 Square D Co Circuit breaker
US2822446A (en) * 1953-12-02 1958-02-04 Square D Co Electric circuit controlling device
US2811606A (en) * 1953-12-11 1957-10-29 Fed Electric Prod Co Automatic circuit breakers
NL193015A (en) * 1953-12-11
US2798918A (en) * 1954-03-03 1957-07-09 Westinghouse Electric Corp Circuit breaker
US2863022A (en) * 1955-04-20 1958-12-02 Gen Electric Circuit breaker
US2902560A (en) * 1955-05-18 1959-09-01 Square D Co Circuit breaker
US3165609A (en) * 1955-08-04 1965-01-12 Fed Pacific Electric Co Temperature compensated circuit breakers
US2891126A (en) * 1955-09-27 1959-06-16 Junior Armando Maciel Dantas Electric current automatic switches
US2866027A (en) * 1956-10-04 1958-12-23 Westinghouse Electric Corp Circuit breaker
US3178535A (en) * 1957-04-12 1965-04-13 Westinghouse Electric Corp Automatic circuit breaker with improved bimetallic and electromagnetic trip device
US2912546A (en) * 1958-05-02 1959-11-10 Texas Instruments Inc Electrical switch structures
US3194908A (en) * 1962-01-31 1965-07-13 Square D Co Three-pole circuit breaker for use in a single-phase panelboard for protecting a three-phase load
US3210500A (en) * 1962-08-01 1965-10-05 Fed Pacific Electric Co Circuit breaker with thermal release and compensation for ambient temperature and contact-resistance heating
JP2503994B2 (en) * 1986-09-02 1996-06-05 味の素株式会社 Oxazolinecarboxylic acid derivative and method for producing the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2325717A (en) * 1940-12-04 1943-08-03 Westinghouse Electric & Mfg Co Circuit breaker
US2348995A (en) * 1941-11-29 1944-05-16 Wilcolator Co Control device
US2458807A (en) * 1945-07-16 1949-01-11 Hopax Ind Inc Thermostatic switch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8305028B2 (en) 2010-03-09 2012-11-06 Nidec Motor Corporation Electric motor and switch for electric motor having arc barrier
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

Also Published As

Publication number Publication date
FR1058938A (en) 1954-03-19
US2666114A (en) 1954-01-12
GB728708A (en) 1955-04-27
FR65028E (en) 1956-01-25

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