Electric heating – Heating devices – With heater-unit housing – casing – or support means
Patent
1984-09-26
1986-12-02
Goldberg, E. A.
Electric heating
Heating devices
With heater-unit housing, casing, or support means
219464, 219543, 219544, 219549, 338211, H05B 306, H05B 354
Patent
active
046266640
ABSTRACT:
An electrical heating device comprising a substrate having an upper insulating surface, a semi-conductor pattern carried on the insulating surface, and a pair of metallic conductors mounted in face-to-face engagement with said semi-conductor pattern. The semi-conductor pattern includes a pair of spaced connector portions and at least one heating portion extending between and electrically connected to each of said connector portions, the connector portions have a electrical conductivity greater than that of said heating portion, and each of the metallic conductors is in face-to-face engagement with a respective one of said connector portions and has an area that is less than that of said respective one of said connector portions and an area:perimeter ratio greater than D/20 wherein D is the major dimension of the respective conductor portion.
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patent: 4348584 (1982-09-01), Gale et al.
patent: 4385226 (1983-05-01), Sauer
Flexwatt Corporation
Goldberg E. A.
Preston Gerald E.
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