Motor control means for power driven window

Details Motor control means for power driven window Motor control means for power driven window

1977-06-01

1978-10-10

Smith, Jr., David

Electricity: motive power systems

Automatic and/or with time-delay means

Terminal voltage or counter-electromotive force of...

318331, 318469, G05B 100

Patent

active

041198999

ABSTRACT:
A motor control means for power driven window including an reversible D.C. motor having first and second brushes and a third grounded brush. The motor control means also has a first switch for selectively supplying a D.C. power to one of the first and second brush to drive the motor. A solenoid is provided to be energized by a counter electromotive voltage induced between the first and second brushes during rotation of the motor. When the solenoid is energized, the solenoid acts to hold a second switch in a closed condition so as to maintain supply of the driving power to the motor.

REFERENCES:
patent: 3231806 (1966-01-01), Schmedel
patent: 3950675 (1976-04-01), Weber et al.
patent: 4040117 (1977-08-01), Houser
patent: 4048662 (1977-09-01), Burguburu

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