Electric heating – Heating devices – Combined with diverse-type art device
Patent
1997-10-09
1999-11-09
Walberg, Teresa
Electric heating
Heating devices
Combined with diverse-type art device
219219, 219522, 116 6, B60L 102, H05B 306, G08B 1500
Patent
active
059819073
ABSTRACT:
An apparatus and method for monitoring current flow through a resistive heating element and for detecting breakage of the heating element. In one preferred embodiment the heating element is disposed on a vehicle window. A current is passed through the heating element continuously, even when the vehicle ignition is turned off. A differential amplifier is used to generate a signal representative of the current flow through the heating element which is indicative of whether the heating element is functioning properly or has been broken. The signal is converted from an analog to a digital signal by an analog to digital convertor and then subsequently output to a controller or computer. From this signal the computer determines if the heating element has been broken. The apparatus and method can be used for a variety of functions, but has particular utility in detecting if a window supporting the heating element has been broken such as during an attempted theft.
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Robinson Daniel
UT Automotive Dearborn Inc.
Walberg Teresa
LandOfFree
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