Electricity: motive power systems – Automatic and/or with time-delay means – Moisture content or wetness
Patent
1990-07-03
1991-10-15
Shoop, Jr., William M.
Electricity: motive power systems
Automatic and/or with time-delay means
Moisture content or wetness
318434, 318DIG2, 15250C, 1525016, B60S 108
Patent
active
050577549
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. Means for automatic activation of a window washer in response to the detection of moisture contaminated with salts or oils are provided, together with means for activating a window heater in response to the detection of ice by the disclosed control system.
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Mist-Defy'R, Inc.
Shoop Jr. William M.
Wysocki A. Jonathan
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