Heating cable

Details Heating cable Heating cable

1997-05-16

2000-11-07

Walberg, Teresa

Electric heating

Heating devices

With heater-unit housing, casing, or support means

219505, 219553, H05B 354

Patent

active

061440183

ABSTRACT:
A heating cable for maintaining pipes and related equipment at temperatures above freezing or at elevated process temperatures. The heating cable includes a pair of elongated electrode wires each coated with a layer of insulating material. The layer of insulating material is partially stripped off the wires at spaced, alternating locations. A resistive heater wire is helically wound around a yarn of fibrous insulating material to form an elongated resistor core. The elongated resistor core is spirally wound around the electrode wires and is brought into electrical contact with the electrode wires at the alternating locations where the wires are partially stripped. A second layer of insulating material covers the elongated resistor core and forms an outer surface for the cable.

REFERENCES:
patent: 2422477 (1947-06-01), Driver
patent: 2947963 (1960-08-01), Oakley
patent: 3492622 (1970-01-01), Hayashi
patent: 3538482 (1970-11-01), Dugger
patent: 3757086 (1973-09-01), Indoe
patent: 4037083 (1977-07-01), Leavines
patent: 4103276 (1978-07-01), Kennon
patent: 4523086 (1985-06-01), Eilentropp
patent: 4864107 (1989-09-01), Boyal
patent: 5245161 (1993-09-01), Okamoto

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