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US 4,733,059 AGranted
Elongated parallel, constant wattage heating cable
AssigneeThermon Manufacturing Company
InventorsDavid C. Goss, Chandrakant M. Yagnik
Life of this patent
Estimating the term…
Abstract
A parallel, zoned heating cable wherein parallel electrical conductors are spaced outwardly from a central heating element preferably formed of a fibrous material containing carbon or graphite or coated with a conductive polymer. Heat conducting dielectric members are preferably located between the heating element and the electrical conductors for improved thermal distribution of the cable. The conductors are alternately connected by splices to the electrical conductors to produce heat of a constant wattage.
Claims27
An electrical heating cable, comprising:
- first and second electrical conductor means extending substantially parallel to and spaced from each other along the length of the cable for carrying electrical current;
- heating means for generating heat comprising a non-metallic, electrically conductive material arranged substantially parallel to said electrical conductor means;
- means for alternately electrically connecting said heating means to said first and second electrical conductor means to establish an alternating series of electrical connections between said first electrical conductor means and said heating means and said second electrical conductor means and said heating means;
- and
- protective cover encasing said electrical conductor means and said heating means.
2 more elements
An electrical heating cable, comprising:
- first and second electrical conductor means extending substantially parallel to and spaced from each other along the length of the cable for carrying electrical current;
- heating means for generating heat, said means being connected to said first and second electrical conductor means;
- heat conducting dielectric means for conducting heat from said heating means, positioned adjacent said heating means and between said first and second electrical conductor means;
- and
- protective cover encasing said electrical conductor means, said heating means and said dielectric means.
2 more elements
Dependencies are inferred from the claim text.