Abstract: A fail safe temperature control device which consists of a nonelastic container or bulb adapted to be subjected to temperature changes, a capillary tube and a pressure responsive device. The container generally is located in the area in which the heat is to be controlled, typically an oven or other heated area. The capillary tube is connected to the container at a first end and to the pressure responsive device at a second end. The nonelastic container, capillary tube and pressure responsive device form a closed system which is filled with a thermally responsive material. The pressure responsive device operates a control device, typically consisting of a normally closed contact and a normally open contact.

Abstract: A fail safe device for use in conjunction with a temperature sensing bulb, capillary, and control device in an oven or other heating appliance, which fail safe device will prevent a failure of the basic control device from permitting a critical overheat condition to occur in the controlled area.

Abstract: This invention relates generally to apparatus wherein a change in temperature is transmitted from a sensing bulb through a capillary to a control device. More particularly this invention is related to a novel, fail safe device for use in conjunction with a temperature sensing bulb, capillary, and control device in an oven or other heating appliance.

Abstract: Improved pollutant emission control system and a combined electric switch and temperature responsive valve therefor as utilized in an internal combustion engine wherein a specially arranged electric switch and valve of the combined switch and valve is respectively connected to a catalytic converter of the engine exhaust system and to certain engine portions such as the engine spark device in order that the thermo-responsive power element of the combined switch and valve controls the operation of both the specially arranged electric switch and valve to minimize noxious pollutant emission from the engine exhaust system.