Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1990-08-22
1992-06-09
Paschall, Mark H.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219499, 219508, 219483, 219486, 307 38, H05B 102
Patent
active
051209365
ABSTRACT:
A multiplex heating system for measuring and regulating the temperature of a plurality of heating elements is disclosed. The heating system includes a plurality of heating elements, which also function as temperature sensing elements, that exhibit a known change in resistance as a function of temperature. The heating system further includes a power source, a control apparatus for regulating the respective heating power of each heating element, a measurement apparatus for measuring changes in resistance in the heating elements, and a plurality of switching arrangements. Each switching arrangement is coupled between one of the heating elements and, alternately, the control apparatus and the measurement apparatus, connecting the heating element to either the control apparatus or the measurement apparatus.
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Lin Wei-Chiang
Shyu Jia-Ming
Industrial Technology Research Institute
Paschall Mark H.
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