Electricity: motive power systems – Battery-fed motor systems
Patent
1977-02-23
1978-07-04
Schaefer, Robert K.
Electricity: motive power systems
Battery-fed motor systems
318459, H02P 300
Patent
active
040991059
ABSTRACT:
Disclosed herein is a direct current motor control comprising a direct current motor, a solenoid switch including an actuating coil, a first lead connecting the drive motor and the solenoid switch in series relation to each other, a second lead connected to the motor and adapted to be connected to one terminal of a direct current source, a third lead connected to the solenoid switch and adapted to be connected to the other terminal of the direct current source, a sub-circuit assembly including the solenoid actuating coil and a solenoid coil actuating switch connected in series with each other, a fourth lead connected to the sub-circuit assembly and adapted to be connected to the one terminal of the direct current source, a solenoid latching switch connected to the sub-circuit assembly in series relation thereto and also connected to the third lead, a fourth lead connected to the sub-circuit assembly in series relation thereto and in parallel relation to the solenoid latching switch and also connected to the first lead, and a controller for regulating the rate of energization of the drive motor to control the speed thereof, for opening the solenoid coil actuating switch when the drive motor is de-energized, for closing the solenoid coil actuating switch and the solenoid latching switch in response to regulation of the motor at slow speed, and for opening the solenoid latching switch in response to regulation of the drive motor at a higher speed.
REFERENCES:
patent: 2721300 (1955-10-01), Myles
patent: 3376467 (1968-04-01), Ree
patent: 3474296 (1969-10-01), Rickey
patent: 3475061 (1969-10-01), Steinkamp et al.
Mutter Michael K.
Outboard Marine Corporation
Schaefer Robert K.
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