Electric heating – Heating devices – With protective means for heater
Patent
1996-08-15
1998-01-20
Paschall, Mark H.
Electric heating
Heating devices
With protective means for heater
219497, 219506, 219549, 219213, 340580, 361 42, H05B 102
Patent
active
057104085
ABSTRACT:
The invention is directed to an ice and snow melting system. At least one sensor is provided, with each sensor being configured for sensing a temperature or moisture associated with an ambient environment and providing a signal indicative thereof. A heater for melting the ice and snow includes at least two electrical conductors associated therewith. An automatic controller is connected to the at least one sensor, and includes a ground fault circuit interrupter in communication with at least two of the electrical conductors associated with the heater. The ground fault circuit interrupter detects a ground fault condition associated with the heater and provides a signal indicative thereof. The controller selectively controls operation of the heater dependent upon the sensor signal and/or the ground fault circuit interrupter signal.
REFERENCES:
patent: 4023043 (1977-05-01), Stevenson
patent: 4520417 (1985-05-01), Frank
patent: 4859834 (1989-08-01), Hausler et al.
patent: 4967059 (1990-10-01), Bayless et al.
patent: 5140135 (1992-08-01), Freeman
patent: 5344696 (1994-09-01), Hastings et al.
patent: 5591365 (1997-01-01), Shields
MSX, Inc.
Paschall Mark H.
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