Electrical heating device

Details Electrical heating device Electrical heating device

1984-02-15

1986-12-30

Goldberg, E. A.

Electric heating

Heating devices

With heating unit structure

219552, 338308, 338314, 338320, 338330, 338333, H05B 316

Patent

active

046330682

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: 2473183 (1949-06-01), Watson
patent: 2489643 (1949-11-01), Hunter
patent: 2596327 (1962-05-01), Cox et al.
patent: 2737562 (1956-03-01), Thornton
patent: 3313920 (1967-04-01), Gallez
patent: 3751620 (1973-08-01), Yuasa
patent: 3813520 (1974-05-01), Brouneus
patent: 4031356 (1977-06-01), Niibe
patent: 4348584 (1982-09-01), Gale et al.
patent: 4485297 (1984-11-01), Grise et al.

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