Control system for operating a window wiper in response to water

Details Control system for operating a window wiper in response to water Control system for operating a window wiper in response to water

1988-10-14

1990-07-17

Shoop, Jr., William M.

Electricity: motive power systems

Automatic and/or with time-delay means

Moisture content or wetness

318DIG2, 1525013, H02P 300

Patent

active

049423495

ABSTRACT:
An automatic control system for operating an electrically actuated device, such as a windshield wiper, power window, sun roof or convertible top of a motor vehicle, in response to the presence of water moisture. The control system includes a moisture sensor having a plurality of spaced apart, exposed conductive strips, the strips being arranged in adjacent pairs; a voltage source coupled to one strip of each pair; a current detector coupled to the other strip of each pair to discriminate between the presence or absence of moisture droplets on each pair; a drop accumulation detector, coupled to the current detector, for determining the number of pairs of sensor strips which are contacted by moisture droplets; and an electrical switch, coupled to the droplet detector, for switching on the electrical device in response to the number of droplets present on the moisture sensor.

REFERENCES:
patent: 3786330 (1974-01-01), Inoue et al.
patent: 3794847 (1974-02-01), Cacliou
patent: 4127763 (1978-11-01), Roselli
patent: 4389603 (1983-06-01), Kogawa et al.
patent: 4476419 (1984-10-01), Fukatsu et al.
patent: 4527105 (1985-07-01), Shiraishi
patent: 4595866 (1986-06-01), Fukatsu et al.
patent: 4665351 (1987-05-01), Nyberg
patent: 4703237 (1987-10-01), Hochstein
patent: 4705998 (1987-11-01), Millerd et al.

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