Thermostatic controller for waterbed heater

Details Thermostatic controller for waterbed heater Thermostatic controller for waterbed heater

1988-12-21

1989-09-05

Broome, H.

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

Expansible or vaporizable fluid actuated

337323, 337327, H01H 3738, H01H 3736

Patent

active

048642703

ABSTRACT:
A thermostatic controller for a waterbed heater of the type where the water bladder is enclosed in a foam casing with the controller disposed between the bladder and the side of the casing. The controller has a liquid filled bulb and capillary temperature sensor disposed in a sensing chamber isolated by dead air from a separate walled switching chamber having a diaphragm type actuator connected to the capillary tube for moving a lever spring biased against the actuator and operable to actuate a snap switch. An adjustment camshaft extends externally of the controller housing for adjusting the bias on the lever for changing the temperature at which the snap switch is actuated.

REFERENCES:
patent: 3293394 (1966-12-01), Staples
patent: 4700168 (1987-10-01), Sirois et al.

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