Electric heating – Heating devices – Combined with pressure application means
Patent
1986-10-16
1989-05-02
Pellinen, A. D.
Electric heating
Heating devices
Combined with pressure application means
219246, 374132, D06F 7526
Patent
active
048271047
ABSTRACT:
An electronic temperature control for a cordless ironing apparatus. The temperature of the sole plate of the iron is sensed by a thermistor embedded therein; the thermistor is part of an astable multivibrator circuit, and any change in temperature of the sole plate causes a change in resistance of the thermistor, and a corresponding change in frequency at the output of the multivibrator. This output drives an infrared LED, and the light emitted by the LED in the iron is sensed by a phototransistor in the base, which relays the sensed temperature information to a microprocessor therein which controls the current applied to the heating element accordingly, to maintain the desired temperature of the sole plate.
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Dart Industries Inc.
McIlwain Russell L.
Pellinen A. D.
Wysocki A. Jonathan
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