GB392490A - Improvements in and relating to thermal time relays for controlling the auxiliary windings of induction motors - Google Patents

Improvements in and relating to thermal time relays for controlling the auxiliary windings of induction motors

Info

Publication number
GB392490A
GB392490A GB1453/33A GB145333A GB392490A GB 392490 A GB392490 A GB 392490A GB 1453/33 A GB1453/33 A GB 1453/33A GB 145333 A GB145333 A GB 145333A GB 392490 A GB392490 A GB 392490A
Authority
GB
United Kingdom
Prior art keywords
strip
auxiliary winding
switch
induction motors
jan
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
GB1453/33A
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
Publication of GB392490A publication Critical patent/GB392490A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/002—Structural combination of a time delay electrothermal relay with an electrothermal protective relay, e.g. a start relay

Landscapes

  • Thermally Actuated Switches (AREA)

Abstract

392,490. Induction motors. INTERNATIONAL GENERAL ELECTRIC CO., Inc., 120, Broadway, New York, U.S.A.- (Assignees of Allgemeine Elektricitõts-Ges.; 2, Friedrich Karl-Ufer, Berlin.) Jan. 16, 1933, No. 1453. Convention date, Jan. 16, 1932. [Class 35.] A thermal switch for switching out the auxiliary winding of a single phase induction motor after the motor has started, comprises a bimetallic strip 9 held in compression between resilient supports 16, 17 and carrying a conductor 13 which, in the cold position shown, bridges contacts 10, 11 in the circuit of an auxiliary winding 3. Current is supplied to the strip 9 by a transformer 7, 8 and when the strip is heated up it snaps across the dead-centre position and switches out the auxiliary winding 3 and disconnects the transformer. A push-button 18 is provided for returning the strip to its initial position. If, however, the strip is of a type which returns, on cooling, a resistance 19 is connected as shown in Fig. 1, so that after the switch has snapped across sufficient heating current is maintained to retain the switch in the open position.
GB1453/33A 1932-01-16 1933-01-16 Improvements in and relating to thermal time relays for controlling the auxiliary windings of induction motors Expired GB392490A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE392490X 1932-01-16

Publications (1)

Publication Number Publication Date
GB392490A true GB392490A (en) 1933-05-18

Family

ID=6385988

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1453/33A Expired GB392490A (en) 1932-01-16 1933-01-16 Improvements in and relating to thermal time relays for controlling the auxiliary windings of induction motors

Country Status (1)

Country Link
GB (1) GB392490A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451535A (en) * 1943-01-29 1948-10-19 Gen Motors Corp Multiple control
US3495150A (en) * 1966-08-29 1970-02-10 Danfoss As Thermally-responsive starting device for a single-phase asynchronous motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451535A (en) * 1943-01-29 1948-10-19 Gen Motors Corp Multiple control
US3495150A (en) * 1966-08-29 1970-02-10 Danfoss As Thermally-responsive starting device for a single-phase asynchronous motor

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