GB574434A - Improvements in electric circuit breakers - Google Patents

Improvements in electric circuit breakers

Info

Publication number
GB574434A
GB574434A GB20592/43A GB2059243A GB574434A GB 574434 A GB574434 A GB 574434A GB 20592/43 A GB20592/43 A GB 20592/43A GB 2059243 A GB2059243 A GB 2059243A GB 574434 A GB574434 A GB 574434A
Authority
GB
United Kingdom
Prior art keywords
contact
contacts
bimetal strip
sparking
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
GB20592/43A
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.)
WILLIAM EARLE STILWELL JR
Original Assignee
WILLIAM EARLE STILWELL JR
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 WILLIAM EARLE STILWELL JR filed Critical WILLIAM EARLE STILWELL JR
Publication of GB574434A publication Critical patent/GB574434A/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
    • H01H71/14—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
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
    • H01H51/12—Armature is movable between two limit positions of rest and is moved in both directions due to the energisation of one or the other of two electromagnets without the storage of energy to effect the return movement
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermally Actuated Switches (AREA)
  • Breakers (AREA)

Abstract

574,434. Electromagnetic switches. STILWELL, W. E. Dec. 9, 1943, No. 20592. Convention date, Dec. 5, 1942. [Class 38 (v)] An electromagnetic switch has main contacts 110, 111, 112 and sparking contacts 115, 116, 117, is operated on and off by respective energization of coils 106, 107 and is moved " off " automatically on overload by a bimetal strip 118 which is heated by the contact 110 and moves to engage a contact 121 and so close the circuit to the coil 107. The armature 108 and its spindle are controlled by a dead centre spring 114 the bimetal strip 118 is of the snap kind. In the form shown, the movable sparking contact consists of a disc 117 which bends engaging the contacts 115, 116 and so leaves them after the separation of the main contacts &c. In modifications the movable sparking contact is carried by a lever connected to the armature with lost motion and controlled it may be, by a second dead centre spring. The bimetal strip may also be without snap-action and may co-operate with another strip responsive to ambient temperature. Specification 570,293 is referred to.
GB20592/43A 1942-12-05 1943-12-09 Improvements in electric circuit breakers Expired GB574434A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US467919A US2439402A (en) 1942-12-05 1942-12-05 Combined electromagnetic and thermal circuit breaker

Publications (1)

Publication Number Publication Date
GB574434A true GB574434A (en) 1946-01-04

Family

ID=23857685

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20592/43A Expired GB574434A (en) 1942-12-05 1943-12-09 Improvements in electric circuit breakers

Country Status (2)

Country Link
US (1) US2439402A (en)
GB (1) GB574434A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4535311A (en) * 1983-05-20 1985-08-13 Nec Corporation Contact support means for an electromagnetic relay

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176108A (en) * 1956-04-02 1965-03-30 James P Watson Thermally efficient contact-terminal assembly for a switch mechanism

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US661195A (en) * 1899-07-22 1900-11-06 Cutter Electrical And Mfg Company Automatic magnetic circuit-breaker.
US1026296A (en) * 1909-07-27 1912-05-14 Sears B Condit Jr Auxiliary carbon-contact circuit-breaker.
US956421A (en) * 1909-08-17 1910-04-26 Harry C Robinson Electric-switch attachment.
US1439231A (en) * 1920-09-15 1922-12-19 Arthur F Erickson Valve-operating device
US1434637A (en) * 1921-04-04 1922-11-07 Tuck George Albert Valve and actuating means
US1563062A (en) * 1922-07-11 1925-11-24 Philadelphia Steam Heating Com Automatic thermoregulator for boiler and other furnaces
US1530929A (en) * 1922-08-11 1925-03-24 Gen Electric Thermally-controlled switch
US1750268A (en) * 1923-04-26 1930-03-11 Westinghouse Electric & Mfg Co Relay protective system
US1571401A (en) * 1924-01-31 1926-02-02 Arthur F Erickson Valve
US1665014A (en) * 1925-07-09 1928-04-03 Otto Q Beckworth Thermostatic current control
US1645905A (en) * 1926-03-03 1927-10-18 Provements limited
US1764374A (en) * 1927-08-06 1930-06-17 Westinghouse Electric & Mfg Co Thermal relay
US2018340A (en) * 1932-07-30 1935-10-22 Westinghouse Electric & Mfg Co Relay

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4535311A (en) * 1983-05-20 1985-08-13 Nec Corporation Contact support means for an electromagnetic relay

Also Published As

Publication number Publication date
US2439402A (en) 1948-04-13

Similar Documents

Publication Publication Date Title
GB590870A (en) Improvements relating to snap action electric switches
GB684736A (en) Improvements in or relating to thermally-operated circuit breakers
GB687258A (en) Improvements in safety switches for electrically heated appliances
GB604754A (en) Circuit breaker with temperature compensation
GB576821A (en) Improvements relating to thermostatic switches for controlling electric circuits
GB574434A (en) Improvements in electric circuit breakers
GB557543A (en) A manually or automatically resettable electric snap action switch
GB871499A (en) Electromagnetically operable electric switches
GB525106A (en) Improvements in or relating to thermally operated electric switches
GB955587A (en) Pushbutton operated electric circuit breaker
GB966298A (en) Electrical switches
GB615187A (en) Improvements relating to push-button electric circiut breakers
GB908371A (en) Headlamp-dimmer switch system
GB687614A (en) A thermostatic electromagnetic switch assembly
GB749305A (en) Improvements relating to snap-action electric switches
GB582185A (en) Snap-action springs
GB808715A (en) Improvements in and relating to bimetallic electric circuit breakers
GB601088A (en) Improvements in and relating to overload relays
GB570293A (en) Improvements in or relating to circuit breakers for controlling electric circuits
GB935537A (en) Improvements in or relating to thermostatically controlled electrical fan heating devices
GB875203A (en) Push button electric switch
GB744186A (en) Improvements in or relating to electro-magnetic switches
GB556438A (en) Improvements in electric switches having automatic tripping means
GB565996A (en) Improvements in or relating to electrical switching devices for alternating current circuits
GB420653A (en) Improvements in automatic circuit breakers