Temperature control method for positive temperature coefficient type heating element
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United States of America Patent
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Aug 14, 2007
Grant Date -
Sep 22, 2005
app pub date -
Mar 18, 2005
filing date -
Mar 22, 2004
priority date (Note) -
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Abstract
A controller adapted to control the temperature of a heating elements with a wide range of positive temperature coefficient of resistance, including very low values, using a sensor in line with the heating element. The controller is able to take account of non-constant mains power supplies and variation in the element resistance over time.
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