D - Textiles – Paper – 06 – F
Patent
D - Textiles, Paper
06
F
309/10
D06F 75/26 (2006.01) D06F 79/02 (2006.01) G05D 23/24 (2006.01)
Patent
CA 1280143
ELECTRONIC TEMPERATURE CONTROL MEANS FOR CORDLESS IRONS ABSTRACT OF THE DISCLOSURE An electronic temperature control means for a cordless ironing apparatus is described. 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.
547656
Gowling Lafleur Henderson Llp
West Bend Company (the)
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