Thermal cutoff heater
AssigneeTherm-O-Disc, Incorporated
InventorEmil R. Plasko
Life of this patent
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Abstract
A thermal cutoff includes a housing having a resistive coating bonded thereto, and defining a heater for heating the thermal cutoff to its firing temperature.
Claims14
A thermal cutoff including a hollow electrically conductive housing containing thermal means responsive to a predetermined temperature for interrupting current flow through said housing, and an electrically conductive resistive coating bonded to said housing for transferring heat to said thermal means to raise the temperature of said thermal means.
An electrically conductive thermal cutoff including a housing containing thermal means responsive to a predetermined temperature for interrupting current flow, a resistive coating bonded to the exterior of said housing, and connecting means for connecting said thermal means and said resistive coating in an electric circuit, said connecting means including a common connection for said thermal means and said resistive coating.
A thermal cutoff including a generally cylindrical electrically conductive housing containing thermal means responsive to a predetermined temperature for interrupting current flow, a dielectric coating bonded to said housing, a resistive coating bonded to said dielectric coating, and contact means bonded to said resistive coating for connecting same in an electric circuit.
Dependencies are inferred from the claim text.