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US 4,377,346 AGranted
Thermostatic apparatus
AssigneeHoneywell Inc.
InventorsJack L. Beaver, Jerry P. Schroeder, John M. Whitney
Life of this patent
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AssigneeHoneywell Inc.
InventorsJack L. Beaver, Jerry P. Schroeder, John M. Whitney
Estimating the term…
In an electronic thermostatic circuit, a resistive bridge network is employed to sense the level of the ambient temperature. The bridge includes three legs having fixed resistors and one leg having a temperature sensitive resistor as well as a serially connected adjustable potentiometer. The adjustable potentiometer is adjustable to provide a selected set point for the operation of the thermostat within a given range of temperatures. The adjustable potentiometer is provided with a shaft to which an adjusting knob having a pointer thereon is secured by means of a slip fastener. Calibration of the assembly is accomplished by turning the knob with its pointer pointed in a preferred direction then holding the knob while adjusting the shaft and the associated potentiometer until the bridge output corresponds with the value indicated by knob pointer.
A thermostatic assembly comprising:
In a thermostatic assembly having a resistance bridge temperature measuring circuit including at least one temperature sensitive resistor and a temperature selecting potentiometer with an operating knob having a pointer and being frictionally coupled to the adjustment shaft of said potentiometer, and a signal comparator connected to the output diagonal of said bridge, a method of calibrating said thermostatic assembly comprising:
Dependencies are inferred from the claim text.