Compact PTC resistance heater

Electric heating – Heating devices – With heating unit structure

Patent

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Details

219505, 338 22R, H05B 308

Patent

active

047301031

ABSTRACT:
A compact resistor heater device is disclosed comprising a resistor body of ceramic material having a positive temperature coefficient of resistance and having electrically conductive elements disposed upon the resistor body for conducting current from one side of a power supply to one side of the resistor body. The resistor device is encapsulated with a coating of thermally conductive material. In an alternate embodiment of the resistor heater device, a thermally conductive member is disposed in thermally conductive relationship to said resistor body and serves as a heat sink to dissipate the heat generated by the resistor body substantially uniformly over a greater area.

REFERENCES:
patent: 4086467 (1978-04-01), Grant
patent: 4104509 (1978-08-01), Bokestal et al.
patent: 4518850 (1985-05-01), Grasso
patent: 4580034 (1986-04-01), Roth

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