GB191638A - Improvements in and relating to electric circuit controllers - Google Patents

Improvements in and relating to electric circuit controllers

Info

Publication number
GB191638A
GB191638A GB446722A GB446722A GB191638A GB 191638 A GB191638 A GB 191638A GB 446722 A GB446722 A GB 446722A GB 446722 A GB446722 A GB 446722A GB 191638 A GB191638 A GB 191638A
Authority
GB
United Kingdom
Prior art keywords
switch
coil
arrangement
circuits
switches
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
GB446722A
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.)
General Electric Co
Original Assignee
General Electric 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 General Electric Co filed Critical General Electric Co
Priority to GB446722A priority Critical patent/GB191638A/en
Publication of GB191638A publication Critical patent/GB191638A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/28—Power arrangements internal to the switch for operating the driving mechanism using electromagnet

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Motor And Converter Starters (AREA)
  • Protection Of Generators And Motors (AREA)
  • Control Of Multiple Motors (AREA)

Abstract

191,638. British Thomson - Houston Co., Ltd., (General Electric Co.). Feb. 15, 1922. Electromagnetic switches are arranged with controlling switches which short circuit the operating coil so as to avoid sparking w h e n the controlling switch re-opens. In one arrangement, coils 16, 17 respectively acting to close and open a switch 11 connected to a motor 21 are energized alternately by a thermal switch 18. The closure of the switch 11 short-circuits the coil 16, the switch being retained set by a spring 14. The opening of the switch leaves the coil 17 in a closed short circuit round the motor 21. In a modified arrangement, the switch 11 is connected as a relay to set a main switch in action. In further modifications the arrangement is adapted to three-phase circuits and is provided with auxiliary switches which open the short circuits immediately after they have been formed.
GB446722A 1922-02-15 1922-02-15 Improvements in and relating to electric circuit controllers Expired GB191638A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB446722A GB191638A (en) 1922-02-15 1922-02-15 Improvements in and relating to electric circuit controllers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB446722A GB191638A (en) 1922-02-15 1922-02-15 Improvements in and relating to electric circuit controllers

Publications (1)

Publication Number Publication Date
GB191638A true GB191638A (en) 1923-01-18

Family

ID=9777724

Family Applications (1)

Application Number Title Priority Date Filing Date
GB446722A Expired GB191638A (en) 1922-02-15 1922-02-15 Improvements in and relating to electric circuit controllers

Country Status (1)

Country Link
GB (1) GB191638A (en)

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