GB1039081A - An improved electrical circuit breaker - Google Patents

An improved electrical circuit breaker

Info

Publication number
GB1039081A
GB1039081A GB6252/63A GB625263A GB1039081A GB 1039081 A GB1039081 A GB 1039081A GB 6252/63 A GB6252/63 A GB 6252/63A GB 625263 A GB625263 A GB 625263A GB 1039081 A GB1039081 A GB 1039081A
Authority
GB
United Kingdom
Prior art keywords
magnet
spring
contacts
handle
polepiece
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
GB6252/63A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1039081A publication Critical patent/GB1039081A/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
    • H01H71/142—Electrothermal mechanisms actuated due to change of magnetic permeability
    • 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
    • H01H71/22—Electrothermal mechanisms with compensation for variation of ambient temperature
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/504—Manual reset mechanisms which may be also used for manual release provided with anti-rebound means

Landscapes

  • Breakers (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)

Abstract

1,039,081. Automatic circuit breakers. S. SHIMODA. Feb. 15, 1963 [April 9, 1962], No. 6252/63. Heading H2B. An overload circuit breaker comprises a handle 2 which operates contacts 6, 7 through a cam 24 and which is held set by a permanent magnet 12 against a spring bias 19, the magnet 12 having a thermally demagnetizable polepiece 13 adjacent a heater 9 in series with the contacts so that on overload the force of magnet 12 on an armature 17 attached to the handle is overcome by the spring 19 to open the contacts. Ambient temperature compensation is provided by a bimetal spring support 60 and in the closed position an additional magnet 22 opposes spring 19. The temperature rise necessary to release the switch is progressively reduced for greater overloads by the electromagnetic effect of the loop-shaped heater 9 as explained in the Specification. In a modified arrangement (Fig. 3, not shown), magnet 22 is replaced by a spring-locking device 53 and a cam 71 is provided to hold handle 32 in an intermediate position after automatic release. The polepiece 13 may be of barium ferrite or of 29% nickel-steel and in the Specification details are given, graphically, of the variation of the magnetic properties of these and of an Alnico V magnet with temperature.
GB6252/63A 1962-04-09 1963-02-15 An improved electrical circuit breaker Expired GB1039081A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1416662 1962-04-09

Publications (1)

Publication Number Publication Date
GB1039081A true GB1039081A (en) 1966-08-17

Family

ID=11853544

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6252/63A Expired GB1039081A (en) 1962-04-09 1963-02-15 An improved electrical circuit breaker

Country Status (4)

Country Link
US (1) US3226507A (en)
CH (1) CH411101A (en)
DE (1) DE1463517B2 (en)
GB (1) GB1039081A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414519A (en) * 1982-03-10 1983-11-08 Allied Corporation Temperature-sensitive relay
US4434411A (en) 1982-03-10 1984-02-28 Allied Corporation Temperature-sensitive switch
DE10220665A1 (en) * 2002-05-10 2003-11-20 Abb Patent Gmbh Switch for protecting an electric motor has a contact point with fixed and movable contact pieces and a switch latch to act on the contact point.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2184372A (en) * 1937-01-27 1939-12-26 Gen Electric Circuit breaker
US2182864A (en) * 1937-04-22 1939-12-12 William H Frank Overload protective switch
US2751483A (en) * 1954-06-28 1956-06-19 Lavoie Lab Inc Constant temperature oven

Also Published As

Publication number Publication date
DE1463517A1 (en) 1969-04-10
DE1463517B2 (en) 1970-05-21
CH411101A (en) 1966-04-15
US3226507A (en) 1965-12-28

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