Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1984-07-30
1986-01-28
Paschall, M. H.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219497, 219508, 2221465, 237 2A, H05B 102
Patent
active
045673535
ABSTRACT:
In a temperature control system having a heating element and a temperature sensor for sensing the temperature generated by the heating element and providing signals effective to control electric energy to be supplied to the heating element, both the heating element and the temperature sensor are implemented with a single element structure for example a power transistor, which is enabled as a heating element during a first period of time and as a temperature sensor during a second period of time. Thus, the heating/temperature sensing element is enabled on a time-shared basis, compensating for heat resistance incurred during transmission of heat from the heating element to the temperature detecting element. Such a temperature control is useful with precision devices such as an ink jet printer.
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Paschall M. H.
Sharp Kabushiki Kaisha
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