Protective circuit for electric bedcover or the like

Details Protective circuit for electric bedcover or the like Protective circuit for electric bedcover or the like

H - Electricity

05

B

317/11, 309/14

H05B 1/02 (2006.01) H02H 5/04 (2006.01) H05B 3/34 (2006.01)

Patent

CA 1162598

Abstract of the Disclosure 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 over- heated 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 auxili- ary 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 electro- magnetic relay may be substituted for the thermal switch and the auxiliary heater.

383237

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