Electricity: motive power systems – Periodic – repetitious or successive operations control of... – Variable periods or intervals between controlling operations
Patent
1988-08-29
1989-08-22
Ro, Bentsu
Electricity: motive power systems
Periodic, repetitious or successive operations control of...
Variable periods or intervals between controlling operations
318DIG2, B60S 108
Patent
active
048599190
ABSTRACT:
A window wiper control for a motor vehicle in which a relay has an armature connected in series with a motor, an electric power source and a pulse switch through a normally closed contact and further connected in series with the motor, a park switch and source of electric power through a normally open contact. The park switch is responsive to the wiper mechanism to open when the wiper is in a park position and close throughout the rest of the wipe pattern. An electrically controlled switch is connected in series with the relay activating coil and electric power source with a base connected to a capacitor connected to be charged quickly through the park switch and discharged slowly through a resistance. Closure of the pulse switch inititates an immediate cycle of the wipe pattern and a new such cycle after each pause through the normally closed contact of the relay with the remainder of each such cycle being activated through the normally open contact of the relay, the relay armature being held in contact with the normally open contact as the capacitor discharges with the park switch open to create the pauses between successive cycles of the wipe pattern.
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General Motors Corporation
Ro Bentsu
Sigler Robert M.
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