GB784567A - Improvements in thermally operated overload circuit breakers - Google Patents

Improvements in thermally operated overload circuit breakers

Info

Publication number
GB784567A
GB784567A GB37112/55A GB3711255A GB784567A GB 784567 A GB784567 A GB 784567A GB 37112/55 A GB37112/55 A GB 37112/55A GB 3711255 A GB3711255 A GB 3711255A GB 784567 A GB784567 A GB 784567A
Authority
GB
United Kingdom
Prior art keywords
blade
circuit breakers
temperature
overload circuit
thermally operated
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
GB37112/55A
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.)
Wilcolator Co
Original Assignee
Wilcolator 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 Wilcolator Co filed Critical Wilcolator Co
Publication of GB784567A publication Critical patent/GB784567A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/275—Control of temperature characterised by the use of electric means with sensing element expanding, contracting, or fusing in response to changes of temperature
    • G05D23/27535—Details of the sensing element
    • G05D23/2754—Details of the sensing element using bimetallic element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H81/00—Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting
    • H01H81/02—Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting electrothermally operated

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

784,567. Temperature-responsive actuating-elements. WILCOLATOR CO. Dec. 28, 1955 [Feb. 14, 1955]. No. 37112/55. Class 64(2) [Also in Group XXXVII] A thermal switch comprises a dished, bimetallic, snap-action, disc-type switch blade 12 of substantially circular shape which is mounted by means of a tongue 36 cut from the centre of the blade. The blade is connected by a rivet.40 to a terminal plate 14 mounted on an insulating plate 20 and carries a contact 38 which normally engages a fixed contact 24. On excessive current through the blade 12 the blade snaps over and engages a stop 48 whose position may be initially adjusted by bending to vary the reclosing temperature.
GB37112/55A 1955-02-14 1955-12-28 Improvements in thermally operated overload circuit breakers Expired GB784567A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US487749A US2828386A (en) 1955-02-14 1955-02-14 Motor protector or circuit breaker and bimetal blade therefor

Publications (1)

Publication Number Publication Date
GB784567A true GB784567A (en) 1957-10-09

Family

ID=23936966

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37112/55A Expired GB784567A (en) 1955-02-14 1955-12-28 Improvements in thermally operated overload circuit breakers

Country Status (3)

Country Link
US (1) US2828386A (en)
DE (1) DE1071213B (en)
GB (1) GB784567A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2951137A (en) * 1958-12-24 1960-08-30 Texas Instruments Inc Thermostatic switch
US3183383A (en) * 1961-10-25 1965-05-11 Texas Instruments Inc Thermal protector for electrical translating devices
US3275773A (en) * 1964-04-09 1966-09-27 Grover Products Corp Over-center snap switch
US3573697A (en) * 1968-09-13 1971-04-06 Sylvania Electric Prod Hermetically sealed circuit breaker

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2266537A (en) * 1937-02-16 1941-12-16 William B Elmer Snap acting device
US2182048A (en) * 1937-02-23 1939-12-05 William B Elmer Electric heat controller
US2361162A (en) * 1942-08-26 1944-10-24 Westinghouse Electric & Mfg Co Circuit interrupter
GB560434A (en) * 1942-12-31 1944-04-04 Frederick Cecil Heayberd Improvements in or relating to bi-metallic electric cut-outs
GB677161A (en) * 1949-12-31 1952-08-13 Lucas Ltd Joseph Improvements relating to thermally-operable electric switches
US2707216A (en) * 1953-01-21 1955-04-26 Essex Wire Corp Bimetal blade

Also Published As

Publication number Publication date
DE1071213B (en)
US2828386A (en) 1958-03-25

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