GB482822A - Improvements relating to thermally-tripped electric switches - Google Patents

Improvements relating to thermally-tripped electric switches

Info

Publication number
GB482822A
GB482822A GB2411236A GB2411236A GB482822A GB 482822 A GB482822 A GB 482822A GB 2411236 A GB2411236 A GB 2411236A GB 2411236 A GB2411236 A GB 2411236A GB 482822 A GB482822 A GB 482822A
Authority
GB
United Kingdom
Prior art keywords
sleeve
carrying
overload
contacts
tripped
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
GB2411236A
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.)
ARTHUR WILLIAM VICARY
Midland Electric Manufacturing Co Ltd
Original Assignee
ARTHUR WILLIAM VICARY
Midland Electric Manufacturing Co Ltd
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 ARTHUR WILLIAM VICARY, Midland Electric Manufacturing Co Ltd filed Critical ARTHUR WILLIAM VICARY
Priority to GB2411236A priority Critical patent/GB482822A/en
Publication of GB482822A publication Critical patent/GB482822A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01H73/22—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 electrothermal release and no other automatic release
    • H01H73/30—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 electrothermal release and no other automatic release reset by push-button, pull-knob or slide

Landscapes

  • Thermally Actuated Switches (AREA)

Abstract

482,822. Automatic circuit-breakers. MIDLAND ELECTRIC MANUFACTURING CO., Ltd., and VICARY, A. W. Sept. 3, 1936, No. 24112. [Class 38 (v)] A thermally-tripped overload multi-pole switch comprises a pivoted member d carrying, in the case of a three-pole switch, contacts e adapted to be pressed into engagement with three pairs of fixed contacts b by depression of a hand push h, the switch being then latched in the closed position by a spring-biassed lever o carrying an insulating sleeve m which overlaps the end n of the member d. The lever o is U-shaped, being pivoted at z and carrying the sleeve m on its middle portion. It also has an extension q which may be engaged by a hand push r to trip the switch open manually. The overload release consists of three bimetallic strips s heated by heating coils w. On overload one or more of the strips moves the sleeve m to release the contact arm d which is rotated about its pivot y by a spring k. Adjustment for current setting may be effected by sliding a member 6 along the end of a bimetal strip s, the position of the member 6 being determined by a projection engaging one of two recesses. The sleeve m may consist of several portions which may be fixed or rotatable. The trunnion y on the arm d, engages a fixed slot z, and normally occupies the position shown. It may, however, be pulled by hand into the dotted position to allow the contacts to be exposed.
GB2411236A 1936-09-03 1936-09-03 Improvements relating to thermally-tripped electric switches Expired GB482822A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2411236A GB482822A (en) 1936-09-03 1936-09-03 Improvements relating to thermally-tripped electric switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2411236A GB482822A (en) 1936-09-03 1936-09-03 Improvements relating to thermally-tripped electric switches

Publications (1)

Publication Number Publication Date
GB482822A true GB482822A (en) 1938-04-04

Family

ID=10206554

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2411236A Expired GB482822A (en) 1936-09-03 1936-09-03 Improvements relating to thermally-tripped electric switches

Country Status (1)

Country Link
GB (1) GB482822A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2668886A (en) * 1952-02-05 1954-02-09 Mechanical Products Inc Circuit breaker
US2749407A (en) * 1953-10-15 1956-06-05 Electrical Apparatus Co Ltd Single phasing preventor
US2925481A (en) * 1954-10-07 1960-02-16 Gen Electric Circuit breaker
US2981811A (en) * 1957-08-22 1961-04-25 Gen Electric Circuit breaker

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2668886A (en) * 1952-02-05 1954-02-09 Mechanical Products Inc Circuit breaker
US2749407A (en) * 1953-10-15 1956-06-05 Electrical Apparatus Co Ltd Single phasing preventor
US2925481A (en) * 1954-10-07 1960-02-16 Gen Electric Circuit breaker
US2981811A (en) * 1957-08-22 1961-04-25 Gen Electric Circuit breaker

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