GB196305A - Improvements in and relating to electric relays and the like - Google Patents

Improvements in and relating to electric relays and the like

Info

Publication number
GB196305A
GB196305A GB2693221A GB2693221A GB196305A GB 196305 A GB196305 A GB 196305A GB 2693221 A GB2693221 A GB 2693221A GB 2693221 A GB2693221 A GB 2693221A GB 196305 A GB196305 A GB 196305A
Authority
GB
United Kingdom
Prior art keywords
duration
current
relating
relays
appreciable
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
GB2693221A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB2693221A priority Critical patent/GB196305A/en
Publication of GB196305A publication Critical patent/GB196305A/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
    • H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
    • H01H71/446—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay making use of an inertia mass

Landscapes

  • Motor And Converter Starters (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

196,305. British Thomson - Houston Co., Ltd., and Fitzgerald, A. S. Oct. 11,1921. Electromagnetic switches or relays are rendered insensitive to relatively heavy currents of very short duration (corresponding for example to one or two alternating current cycles) while retaining the full sensitiveness to normal overloads of appreciable duration by providing a suspended or floating mass 5 in the path of movement of the armature 3 to receive the energy due to the momentary current Without the relay closing. When an excess current of appreciable duration flows in the actuating winding 2 the inertia mass 5 is slowly moved aside and the circuit is closed.
GB2693221A 1921-10-11 1921-10-11 Improvements in and relating to electric relays and the like Expired GB196305A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2693221A GB196305A (en) 1921-10-11 1921-10-11 Improvements in and relating to electric relays and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2693221A GB196305A (en) 1921-10-11 1921-10-11 Improvements in and relating to electric relays and the like

Publications (1)

Publication Number Publication Date
GB196305A true GB196305A (en) 1923-04-11

Family

ID=10251466

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2693221A Expired GB196305A (en) 1921-10-11 1921-10-11 Improvements in and relating to electric relays and the like

Country Status (1)

Country Link
GB (1) GB196305A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2417728A (en) * 1942-10-28 1947-03-18 Westinghouse Electric Corp Circuit breaker
US2491657A (en) * 1943-05-28 1949-12-20 Ite Circuit Breaker Ltd Shockproof tripping armature
US2504855A (en) * 1944-06-09 1950-04-18 Westinghouse Electric Corp Retarded latch trip circuit breaker
US2534906A (en) * 1943-12-11 1950-12-19 Westinghouse Electric Corp Shockproof circuit interrupter
US5192841A (en) * 1991-11-06 1993-03-09 Westinghouse Electric Corp. Circuit breaker with shock absorbing mechanism

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2417728A (en) * 1942-10-28 1947-03-18 Westinghouse Electric Corp Circuit breaker
US2491657A (en) * 1943-05-28 1949-12-20 Ite Circuit Breaker Ltd Shockproof tripping armature
US2534906A (en) * 1943-12-11 1950-12-19 Westinghouse Electric Corp Shockproof circuit interrupter
US2504855A (en) * 1944-06-09 1950-04-18 Westinghouse Electric Corp Retarded latch trip circuit breaker
US5192841A (en) * 1991-11-06 1993-03-09 Westinghouse Electric Corp. Circuit breaker with shock absorbing mechanism

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