Electricity: motive power systems – Motor-reversing – Armature or primary circuit control
Patent
1977-04-04
1978-07-11
Rubinson, Gene Z.
Electricity: motive power systems
Motor-reversing
Armature or primary circuit control
318229, 361105, H02P 144
Patent
active
041004680
ABSTRACT:
An electric motor control circuit, especially for a split phase motor, in which a positive temperature coefficient resistor is interposed in the starting winding circuit to substantially remove the starting winding from the circuit after the motor has started while a temperature sensitive switch is provided in series with the motor to deenergize the motor when it is overloaded. The positive temperature coefficient resistor element has a temperature sensitive element associated therewith which prevents the temperature sensitive switch from activating to a closed position from an open position whenever the resistor element is above a predetermined temperature.
REFERENCES:
patent: 2618721 (1952-11-01), Clark
patent: 2624030 (1952-12-01), Swan
patent: 3965392 (1976-06-01), Moorhead et al.
Rubinson Gene Z.
Sealed Unit Parts Co., Inc.
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