GB1018685A - Electric motor control device - Google Patents

Electric motor control device

Info

Publication number
GB1018685A
GB1018685A GB42052/63A GB4205263A GB1018685A GB 1018685 A GB1018685 A GB 1018685A GB 42052/63 A GB42052/63 A GB 42052/63A GB 4205263 A GB4205263 A GB 4205263A GB 1018685 A GB1018685 A GB 1018685A
Authority
GB
United Kingdom
Prior art keywords
bimetal
blade
contact
current
overload
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
GB42052/63A
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.)
Motors Liquidation Co
Original Assignee
Motors Liquidation 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 Motors Liquidation Co filed Critical Motors Liquidation Co
Priority claimed from US234093A external-priority patent/US3206574A/en
Publication of GB1018685A publication Critical patent/GB1018685A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/25—Devices for sensing temperature, or actuated thereby

Abstract

1,018,685. Thermal switches; electromagnetic switches. GENERAL MOTORS CORPORATION. Oct. 24, 1963 [Oct. 30, 1962], No. 42052/63. Heading H2B. A motor control switch incorporates a heater 96, Fig. 1 (not shown), which is energized during starting to accelerate the operation of a bimetal overload switch 46, 42 if an overload occurs. Heavy starting current in a main winding 24 of a motor 28 energizes a solenoid 80 to attract an armature 74 releasing a spring- blade contact 66 into engagement with a contact 68 to energize an auxiliary winding 26. Simultaneously a contact 86 on the armature 74 disengages a contact 85 mounted upon blade 66 to insert the heater 96 in series with the solenoid 80. Should the motor be overloaded during starting the additional heating in the bimetal switch blade 46 due to excessive current causes the blade to snap out of contact with 42 to stop the motor. The blade 66 is mounted on an extension 62, 64 of the bimetal 46. If no overload occurs during starting the current in winding 24 eventually subsides sufficiently to release the armature 74 but should this not occur within a suitable time current flow in bimetal 62 eventually separates the blade 66 from contact 68 to de-energize the winding 26. If subsequent to starting an overload occurs, current in bimetal 62 separates contacts 85, 86 to re-energize heater 96 which assists the overload current in bimetal 46 to open the contacts 42, 46. The armature 74 carries a lead weight 72 and a felt pad 82 to reduce chattering. The overload bimetal 46 is adjustable by a screw 56.
GB42052/63A 1962-10-30 1962-10-24 Electric motor control device Expired GB1018685A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US234093A US3206574A (en) 1962-10-30 1962-10-30 Starting and overload control
US425787A US3292067A (en) 1962-10-30 1965-01-15 Electrical apparatus

Publications (1)

Publication Number Publication Date
GB1018685A true GB1018685A (en) 1966-02-02

Family

ID=26927559

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42052/63A Expired GB1018685A (en) 1962-10-30 1962-10-24 Electric motor control device

Country Status (2)

Country Link
US (1) US3292067A (en)
GB (1) GB1018685A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2160017A (en) * 1984-06-05 1985-12-11 Inertia Switch Ltd Electrical switches

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3424964A (en) * 1965-10-22 1969-01-28 Black & Decker Mfg Co Overload warning signal for motors

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2255437A (en) * 1938-03-26 1941-09-09 Gen Motors Corp Overload device for capacitor start electric motors
US2374967A (en) * 1942-08-27 1945-05-01 Gen Motors Corp Refrigerating apparatus
US2521120A (en) * 1946-12-11 1950-09-05 Gen Motors Corp Overload protector
US2722644A (en) * 1954-01-29 1955-11-01 Gen Motors Corp Starting and overload control for single phase motors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2160017A (en) * 1984-06-05 1985-12-11 Inertia Switch Ltd Electrical switches

Also Published As

Publication number Publication date
US3292067A (en) 1966-12-13

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