Electrical heating device

Details Electrical heating device Electrical heating device

1986-12-23

1988-06-21

Goldberg, E. A.

Electric heating

Heating devices

With heating unit structure

219345, 219548, 219552, 338306, 338314, H05B 316

Patent

active

047526726

ABSTRACT:
An electrical heating device comprises a substrate, a pair of parallel, spaced apart elongated conductors extending longitudinally of the substrate, and a semi-conductor pattern carried on the substrate and electrically connected to and extending between the conductors. The semi-conductor pattern produces a thermal image for an infrared target. In some embodiments, the thermal image is irregular or circular in shape and the semi-conductor pattern includes a plurality of transversely-spaced bars having relatively wide portions outside, and relatively thin portions within, the area producing the thermal image.

REFERENCES:
patent: 2277772 (1942-03-01), Marick
patent: 2489643 (1949-11-01), Hunter
patent: 4485297 (1984-11-01), Grise et al.

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