Variable power density heating using stranded resistance wire

Details Variable power density heating using stranded resistance wire Variable power density heating using stranded resistance wire

1993-12-27

1995-05-02

Evans, Geoffrey S.

Electric heating

Heating devices

With heating unit structure

219212, H05B 334

Patent

active

054121817

ABSTRACT:
An improved electrothermal apparatus includes a stranded heater wire having a plurality of strands, the number of which vary as a function of position to provide a varying output power density. The stranded heater wire is disposed within a blanket which is conformable to the item to be heated. The heater wire is broken into a number of zones, with each zone having a varying number of strands. The strands of the wire are soldered or crimped together at the beginning of each zone. A controller provides electrical energy to the heater assembly.

REFERENCES:
patent: 2499961 (1950-03-01), Lennox
patent: 2973425 (1961-02-01), Kelemen
patent: 3472289 (1969-10-01), Webber et al.
patent: 3646322 (1972-02-01), Speekman
patent: 5073688 (1991-12-01), McCormack

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