Heat transfer heating element and method

Details Heat transfer heating element and method Heat transfer heating element and method

1986-08-25

1988-03-22

Goldberg, E. A.

Electric heating

Heating devices

With heating unit structure

219237, 219238, 219241, 219541, 219550, 219551, 219552, 219553, 338305, 338310, 4271263, 427404, H05B 306, H01C 1012, B05D 512

Patent

active

047330554

ABSTRACT:
An electric heating element with a resistance element, a metal sheath in heat transfer relation to the resistance element on one side of the sheath and a thin, dry coating of refractory material major proportion by weight of which is boron nitride on another side of the sheath to be placed in heat transfer relation to an object to be heated. A method of enhancing the heat-transfer qualities of a metal sheathed electric heating element includes coating the metal sheath, on a surface to be placed in heat-transfer relation to an object to be heated, with a liquid slurry of refractory material a major proportion of which is boron nitride, drying and outgassing the coating and mounting the sheathed element on an object to be heated with the coating in contact with the object.

REFERENCES:
patent: 3521213 (1970-07-01), Hardy
patent: 4544829 (1985-10-01), Adachi et al.
patent: 4621182 (1986-11-01), Driggers

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