Hair styling appliance heater and control

Details Hair styling appliance heater and control Hair styling appliance heater and control

1992-11-13

1994-10-11

Paschall, Mark H.

Electric heating

Heating devices

Tool or instrument

219502, 219499, 219501, 219241, 219222, 132229, 132232, H05B 102, A45D 104

Patent

active

053549678

ABSTRACT:
A low cost heater element is disclosed which is formed of a wire wound mica paper substrate and a mica paper cover and a low cost diode acting as a negative temperature coefficient of resistance NTC temperature sensor. A control circuit provides power to the heater element in proportion to the line voltage. As a result, a light weight, low cost heater element is employed for various line voltages available throughout the world. The system employs digital logic to achieve temperature sensing, power sensing and indication that the system is on and operating at the correct temperature.

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