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US 2002/0118550 A1Published application
Low-frequency de-icing of cableways
OwnerVlctor F. Petrenko, Charles R. Sullivaninventors
Life of this patent
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Abstract
Low-frequency AC power in a range of about from 50 to 200 Hz flows through a cableway, providing 5 to 100 watts per meter of cableway. Through separate connections to a power bus, a cableway is electrically divided into branches of a parallel circuit that use low voltage to heat. A transformer connected to each branch transforms high-voltage low amperage current to low-voltage high amperage current.
Claims56
A system for de-icing a cableway, comprising:
- a cableway;
- and
- a power source electrically connected to the cableway for heating the cableway.
A system for de-icing an elongated conductor, comprising:
- an elongated conductor;
- and
- a power source electrically connected to the elongated conductor;
- wherein the elongated conductor comprises a conductor span, said cable span being separately connected to a power source.
1 more element
A method for de-icing a cableway, comprising a step of:
- applying electric power to the cableway for heating the cableway.
A method for de-icing a elongated conductor, comprising a step of:
- separately connecting a conductor span with a power source;
- and
- applying electric power to the connected conductor span.
Dependencies are inferred from the claim text.