초록 ▼

A heat motor includes a chamber containing a thermally expansible material and an electrical heating element within the expansible material, wherein the expansible material is interposed between all significant surfaces of the electrical heating element and walls of the heat motor defining the chamb

A heat motor includes a chamber containing a thermally expansible material and an electrical heating element within the expansible material, wherein the expansible material is interposed between all significant surfaces of the electrical heating element and walls of the heat motor defining the chamber. Electrical leads for the electrical heating element extend out of the chamber through a glass plug mounted in a bottom wall of the heat motor. The bottom wall is connected to a side wall of the heat motor by crimping the side wall under the bottom wall to form a flange and to compress an elastomeric seal between the bottom wall and a shoulder of the heat body above the bottom wall. In one embodiment, the electrical heating element includes electrically conducting plates which receive the electrical leads in a plug-in connection. The electric resistance element is a thermistor having a positive temperature coefficient or a thin film resistor having a resistance film substantially covering two opposite sides to maximize heat transfer area.

대표청구항 ▼

A heat motor comprising: a metal body defining a chamber having an open end, said body including a metal end wall, a metal side wall, and a flange on said side wall extending under said end wall; an element movable with respect to said body to perform an operation; a thermally expansible wax in said

A heat motor comprising: a metal body defining a chamber having an open end, said body including a metal end wall, a metal side wall, and a flange on said side wall extending under said end wall; an element movable with respect to said body to perform an operation; a thermally expansible wax in said chamber, said expansible wax being expansible in response to an increase in its temperature to move said movable element; an electric heating element positioned in said chamber and within said thermally expansible wax, said thermally expansible wax being interposed between all significant surfaces of said heating element and said body; electrical leads extending from said electric heating element to a region outside said body of the heat motor; and electrical insulating material secured in said metal end wall of said body, said leads extending through said electrical insulating material, and said metal end wall having substantially the same coefficient of thermal expansion as the electrical insulating material, so that no leakage of said expansible material occurs between said end wall and the electrical insulating material as the temperature of the heat motor changes.