GB189720A - Improvements in and relating to electric circuit controllers - Google Patents

Improvements in and relating to electric circuit controllers

Info

Publication number
GB189720A
GB189720A GB1344222A GB1344222A GB189720A GB 189720 A GB189720 A GB 189720A GB 1344222 A GB1344222 A GB 1344222A GB 1344222 A GB1344222 A GB 1344222A GB 189720 A GB189720 A GB 189720A
Authority
GB
United Kingdom
Prior art keywords
switch
controllers
relating
electric circuit
motors
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
GB1344222A
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
Priority to US51803121 priority Critical patent/US1431308A/en
Application filed by General Electric Co filed Critical General Electric Co
Priority to GB1344222A priority patent/GB189720A/en
Publication of GB189720A publication Critical patent/GB189720A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/005—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too low isolation resistance, too high load, short-circuit; earth fault

Landscapes

  • Control Of Multiple Motors (AREA)
  • Protection Of Generators And Motors (AREA)
  • Motor And Converter Starters (AREA)

Abstract

189,720. British Thomson - Houston Co., Ltd., (General Electric Co.). May 12, 1922. Protective systems.-In order to connect motors or other apparatus to mains without danger, two electro-magnetic line switches 16, 17 are controlled by a manual switch 19. The switch 16 closes unconditionally; the switch 17 closes automatically on the response of a relay 20 which has its coil in shunt to all the motors 10, 11, 12 and controllers 13, 14, 15, the relay responding only when the controllers are " off " or in a high resistance position. Current-limit relays 27 - - 30 provide overload protection.
GB1344222A 1921-11-26 1922-05-12 Improvements in and relating to electric circuit controllers Expired GB189720A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US51803121 US1431308A (en) 1921-11-26 1921-11-26 Circuit controller
GB1344222A GB189720A (en) 1921-11-26 1922-05-12 Improvements in and relating to electric circuit controllers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US51803121 US1431308A (en) 1921-11-26 1921-11-26 Circuit controller
GB1344222A GB189720A (en) 1921-11-26 1922-05-12 Improvements in and relating to electric circuit controllers

Publications (1)

Publication Number Publication Date
GB189720A true GB189720A (en) 1922-12-07

Family

ID=52623256

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1344222A Expired GB189720A (en) 1921-11-26 1922-05-12 Improvements in and relating to electric circuit controllers

Country Status (2)

Country Link
US (1) US1431308A (en)
GB (1) GB189720A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2491808A (en) * 1942-08-06 1949-12-20 Gen Electric Multichannel radio and television receiver

Also Published As

Publication number Publication date
US1431308A (en) 1922-10-10

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