GB1028634A - Overload protective electric switch - Google Patents

Overload protective electric switch

Info

Publication number
GB1028634A
GB1028634A GB11785/63A GB1178563A GB1028634A GB 1028634 A GB1028634 A GB 1028634A GB 11785/63 A GB11785/63 A GB 11785/63A GB 1178563 A GB1178563 A GB 1178563A GB 1028634 A GB1028634 A GB 1028634A
Authority
GB
United Kingdom
Prior art keywords
slide
bimetal
switch
overload
contacts
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
GB11785/63A
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.)
ITE Circuit Breaker Co
Original Assignee
ITE Circuit Breaker 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 ITE Circuit Breaker Co filed Critical ITE Circuit Breaker Co
Publication of GB1028634A publication Critical patent/GB1028634A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/20—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil
    • 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
    • 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
    • H01H73/22—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
    • 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
    • H01H2071/109—Operating or release mechanisms with provisions for selecting between automatic or manual reset

Landscapes

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

Abstract

1,028,634. Thermal switches. I.T.E. CIRCUIT BREAKER CO. March 25, 1963 [Sept. 20, 1962], No. 11785/63. Heading H2B. A moulded case overload responsive thermal switch has a bimetal actuator 21 heated by a current carrying loop 18 and mounted at one end on a main support 22 attached to which is an auxiliary support 24 deformable with respect to 22 by a preset adjustment screw 25, the complete unit comprising bimetal and supports 22, 24 being pivotable about a bearing surface 29 of the housing by a knob 28 to set the operating temperature. The bimetal 21 acts through a slide 31 on a coil spring 47 to snap contacts 32, 33 open upon overload but the bimetal is insufficiently resilient to reclose the switch upon cooling, this being done by depressing a reset slide 50 against a bias spring (Figs. 1, 4, not shown). The slide 50 can be held down, by a latch 58 (Fig. 2, not shown) engaging a slot in the slide, when the switch becomes self reclosing. Substitution of a different slide 50a (Fig. 6, not shown) allows the switch to be opened manually as well. Alternative forms of the heater are described (Figs. 6a, 6b, not shown). Auxiliary signalling contacts 43, 44 are provided. Three overload switches 10 are pluggable into a base 150 mounted upon a contactor 200 (not described) and connections are made within the base to connect all the contacts 32, 33 in series with the contactor coil (Fig. 7a, 8, not shown).
GB11785/63A 1962-09-20 1963-03-25 Overload protective electric switch Expired GB1028634A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US225044A US3226510A (en) 1962-09-20 1962-09-20 Electric overload switch with improved thermal actuator

Publications (1)

Publication Number Publication Date
GB1028634A true GB1028634A (en) 1966-05-04

Family

ID=22843287

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11785/63A Expired GB1028634A (en) 1962-09-20 1963-03-25 Overload protective electric switch

Country Status (2)

Country Link
US (1) US3226510A (en)
GB (1) GB1028634A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4148004A (en) * 1977-05-04 1979-04-03 Westinghouse Electric Corp. Circuit breaker with calibrating means
CN114038708A (en) * 2021-11-15 2022-02-11 浙江法拉迪电力科技有限公司 Single-phase circuit breaker transmission mechanism and operating mechanism with same

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3417358A (en) * 1966-09-22 1968-12-17 Ite Circuit Breaker Ltd Ambient temperature compensated overload relay
US4023132A (en) * 1973-10-04 1977-05-10 Dorman Smith Switchgear Limited Electrical circuit breakers
GB1466257A (en) * 1973-10-04 1977-03-02 Dorman Smith Switchgear Ltd Electrical circuit breaker
GB1466258A (en) * 1973-10-04 1977-03-02 Dorman Smith Switchgear Ltd Electrical circuit breakers
US3852694A (en) * 1973-12-26 1974-12-03 Ite Imperial Corp Overload relay with fast acting bimetal on high current
DE2751205A1 (en) * 1977-11-16 1979-05-17 Bbc Brown Boveri & Cie THERMAL OVERCURRENT RELAY
US4630019A (en) * 1984-09-28 1986-12-16 Westinghouse Electric Corp. Molded case circuit breaker with calibration adjusting means for a bimetal
US4680562A (en) * 1985-07-29 1987-07-14 Westinghouse Electric Corp. Integral circuit interrupter with separable modules
DE102011078636A1 (en) * 2011-07-05 2013-01-10 Siemens Aktiengesellschaft Overload release, especially for a circuit breaker

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2144120A (en) * 1936-06-19 1939-01-17 Vapor Car Heating Co Inc Thermal contactor
US2158711A (en) * 1936-11-02 1939-05-16 Emerson Electric Mfg Co Circuit breaker
US2513745A (en) * 1944-12-13 1950-07-04 Rca Corp Metal detector
US2740013A (en) * 1952-09-17 1956-03-27 Cav Ltd Electric switches
US2831943A (en) * 1955-04-06 1958-04-22 Westinghouse Electric Corp Overload relay
US2851556A (en) * 1956-01-09 1958-09-09 Square D Co Ambient temperature compensated relay
US2814686A (en) * 1956-09-24 1957-11-26 Penn Controls Warp switch
US2942081A (en) * 1958-02-13 1960-06-21 Westinghouse Electric Corp Thermal overload relay
US2897319A (en) * 1958-06-26 1959-07-28 Gen Electric Electric switch
DE1140635B (en) * 1959-10-24 1962-12-06 Ellenberger & Poensgen Multipole motor protection switch
US3015007A (en) * 1959-11-19 1961-12-26 Gen Electric Canada Thermal device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4148004A (en) * 1977-05-04 1979-04-03 Westinghouse Electric Corp. Circuit breaker with calibrating means
CN114038708A (en) * 2021-11-15 2022-02-11 浙江法拉迪电力科技有限公司 Single-phase circuit breaker transmission mechanism and operating mechanism with same
CN114038708B (en) * 2021-11-15 2024-04-12 浙江法拉迪电力科技有限公司 Single-phase circuit breaker transmission mechanism and operating mechanism with same

Also Published As

Publication number Publication date
US3226510A (en) 1965-12-28

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