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Heating apparatus and circuit control

  • US 6,097,009 A
  • Filed: 10/16/1998
  • Issued: 08/01/2000
  • Est. Priority Date: 10/17/1997
  • Status: Expired due to Term
First Claim
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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°

  • 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.

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