Thermostat having a temperature sensing element which includes a

Details Thermostat having a temperature sensing element which includes a Thermostat having a temperature sensing element which includes a

1996-07-19

1998-05-19

Picard, Leo P.

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With longitudinally expansible solid element

337123, 337382, 219449, H01H 3748

Patent

active

057540900

ABSTRACT:
A thermostat includes a valve for controlling gas flow, an actuator for controlling operation of the valve, and a temperature sensing element. The temperature sensing element comprises two members, one of which is made of a material having a positive coefficient of thermal expansion and the other of which is made of a material having a negative coefficient of thermal expansion. Each member effects movement of the actuator in a first direction upon sensing a decrease in temperature to effect opening of the valve and in a second direction upon sensing an increase in temperature to effect closing of the valve.

REFERENCES:
patent: 2856489 (1958-08-01), Bletz
patent: 3447746 (1969-06-01), Visos
patent: 3691501 (1972-09-01), Katchka et al.
patent: 5294907 (1994-03-01), Katchka

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