PROTECTIVE CIRCUIT FOR ELECTRIC BEDCOVER OR THE LIKE

A protective circuit for an electric bedcover or similar electric appliance comprises a sensing wire, which is insulated electrically from a heating wire by an insulative material having a fusing temperature corresponding to an overheated condition, a thermal switch, which disables the heating wire when heated sufficiently, an auxiliary heater, which is coupled thermally to the auxiliary heater, a first diode which is connected between a first end of the heating wire and the auxiliary heater, a second diode, which is connected between a second end of the heating wire and the auxiliary heater, and a capacitor, which is connected in parallel with the heating wire, An electromagnetic relay may be substituted for the thermal switch and the auxiliary heater.