Thermostat variation compensating knob
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United States of America Patent
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-
Apr 13, 2004
Grant Date -
Dec 19, 2002
app pub date -
Jun 18, 2001
filing date -
Jun 18, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A heating appliance having an electrical circuit that controls the temperature output of the heating appliance is provided with a bimetallic element that opens upon reaching a temperature level. A potentiometer in the circuit is used to select the temperature level within an acceptable range of temperatures. The potentiometer has a rotatable shaft including a first positioning element. A knob is secured to the shaft and has a second positioning element that engages the first positioning element on the shaft. The first and second positioning elements have portions that may be modified to compensate for variations in the temperature at which the bimetallic element opens. The first positioning element may be a rib, while the second positioning element is a slot in a tubular portion of the knob receives the rib and that may be located in a range of arcuate positions.
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