GB252748A - Improvements in and relating to electric switches and systems of motor control employing the same - Google Patents

Improvements in and relating to electric switches and systems of motor control employing the same

Info

Publication number
GB252748A
GB252748A GB13848/26A GB1384826A GB252748A GB 252748 A GB252748 A GB 252748A GB 13848/26 A GB13848/26 A GB 13848/26A GB 1384826 A GB1384826 A GB 1384826A GB 252748 A GB252748 A GB 252748A
Authority
GB
United Kingdom
Prior art keywords
coil
shaft
relating
systems
same
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
GB13848/26A
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
Publication of GB252748A publication Critical patent/GB252748A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
    • H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
    • H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
    • H02P1/34—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor by progressive reduction of impedance in secondary circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Stopping Of Electric Motors (AREA)

Abstract

252,748. British Thomson-Houston Co., Ltd., (Assignees of Stack, G. E.). June 1, 1925, [Convention date]. Electromagnetic switches; latching.-A switch comprising contacts 10, Fig. 1 closed by rotation of a shaft 11 is provided with an auxiliary contact 12 urged to the closed position when the contacts 10 are closed but prevented from closing by a stop 19 until the current in a coil 21 has decreased to a predetermined value. Rotation of the shaft 11 is communicated to a shaft 14 through a link 18 and causes compression of a spring 15, the stop 19 being retained in position by the combined action of the coil 21 and a spring 22. Adjustment for current in the coil 21 can be effected by nuts 16 or 24 and by placing a resistance in shunt or series with the coil 21.
GB13848/26A 1925-06-01 1926-06-01 Improvements in and relating to electric switches and systems of motor control employing the same Expired GB252748A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US252748XA 1925-06-01 1925-06-01

Publications (1)

Publication Number Publication Date
GB252748A true GB252748A (en) 1927-01-06

Family

ID=21825074

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13848/26A Expired GB252748A (en) 1925-06-01 1926-06-01 Improvements in and relating to electric switches and systems of motor control employing the same

Country Status (1)

Country Link
GB (1) GB252748A (en)

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