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A heating assembly, for use as an electric blanket or personal heating pad, includes a flexible heating panel and an electric circuit for heating the panel. An electrical heating element is mounted directly on the panel and includes inner and outer coaxial coil conductors separated by an electricall

A heating assembly, for use as an electric blanket or personal heating pad, includes a flexible heating panel and an electric circuit for heating the panel. An electrical heating element is mounted directly on the panel and includes inner and outer coaxial coil conductors separated by an electrically insulating layer and surrounded by an outer electrically insulating layer. A two-core flexible electric cable connects the heating element to the power supply, and to an electric control switch for controlling operation of the heating element, a fuse being located in the circuit to be actuated in the event of a short circuit occurring between the conductors of the heating element, due to breakdown of the inner insulating layer. The electric circuit also includes a device for controlling the temperature of the heating element. The heating element is the only component of the electric circuit which is mounted directly on the flexible heating panel, and is connected to the rest of the circuit, including the control device, by the two-core flexible electric cable.

대표청구항 ▼

[ I claim:] [1.] Heating apparatus comprising a flexible heating panel and electrical components providing an electric circuit for heating the panel, the electrical components including an electrical heating element mounted directly on the panel, said heating element comprising inner and outer coaxi

[ I claim:] [1.] Heating apparatus comprising a flexible heating panel and electrical components providing an electric circuit for heating the panel, the electrical components including an electrical heating element mounted directly on the panel, said heating element comprising inner and outer coaxial conductors electrically connected together at one end thereof, the coaxial conductors being separated by an inner electrically insulating layer therebetween and surrounded by an outer electrically insulating layer disposed on said panel, said inner insulating layer between the conductors having a melting point which is at least 40-60.degree. C. lower than the melting point of the outer insulating layer surrounding the outer conductor, an electric cable for connecting the heating element to a power supply, an electric control switch for controlling operation of the heating element, and a fuse device located to be actuated in the event of a short circuit occurring between the conductors of the heating element resulting from breakdown of any part of said inner insulating layer, said heating element being the only component of said electric circuit which is mounted directly on the flexible heating panel, and said cable for connecting the heating element to a power supply comprising a flexible two-core electrical cable connecting the heating element to the other components of the electric circuit.