Electric heating – Heating devices – With heating unit structure
Patent
1994-12-19
1996-10-15
Walberg, Teresa J.
Electric heating
Heating devices
With heating unit structure
219528, H05B 316
Patent
active
055651240
ABSTRACT:
A flexible heater is disclosed herein having a base substrate or sheet carrying a plurality of spaced apart electrically resistive strips overlapping layers or grids of conductive strips arranged in spaced apart relationship next to each other to form a plurality of intersections with the resistive strips which, when connected, define and form an electrical resistive component of a given value. Each grid is composed of an electrical conductive material such as silver, aluminum or the like while the resistive component may be composed of carbon. The heater is employed as a hand-held unit, an insert or a portion of an article of clothing such as a boot, shoe, glove, jacket or the like. A power source is detachably provided for energizing the electrical components.
REFERENCES:
patent: 3417229 (1968-12-01), Shomphe
patent: 4656339 (1987-04-01), Grise
patent: 4788417 (1988-11-01), Graflind
patent: 5226225 (1993-07-01), Bryan
H. C. Briel, Technical Digest No. 33, Compact Pattern of Parallel Film Resistors with Uniform Power dissipation Capability, Jan. 1974.
Marrs Roger A.
Paik Sam
Walberg Teresa J.
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