Electrical heating device

Details Electrical heating device Electrical heating device

H - Electricity

05

B

309/85

H05B 3/16 (2006.01) H05B 3/36 (2006.01) H05B 3/56 (2006.01) H05B 3/58 (2006.01) H05B 7/00 (2006.01)

Patent

CA 1254935

Electrical Heating Device Abstract of Disclosure 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 an 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 not greater than that D/2 wherein D is the major dimension of the respective conductor portion.

491525

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