Electric heating – Heating devices – With heater-unit housing – casing – or support means
Patent
1998-10-16
2000-08-01
Walberg, Teresa
Electric heating
Heating devices
With heater-unit housing, casing, or support means
219483, 219497, 219212, 219549, 219517, 307 75, H05B 334
Patent
active
06097009&
ABSTRACT:
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.
REFERENCES:
patent: 1752944 (1930-04-01), Eitzen
patent: 4238672 (1980-12-01), Siess
patent: 4400614 (1983-08-01), Sopory
patent: 4491723 (1985-01-01), Cole
patent: 5105067 (1992-04-01), Brekkerstran et al.
patent: 5218185 (1993-06-01), Gross
patent: 5403992 (1995-04-01), Cole
Fastovsky Leonid
Imetec SpA
Walberg Teresa
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