Electric heating device having a metal sheath

Details Electric heating device having a metal sheath Electric heating device having a metal sheath

1987-06-26

1989-08-29

Goldberg, E. A.

Electrical resistors

Incased, embedded, or housed

With gaseous or vacuum spacing between element and casing or...

219374, H01C 103

Patent

active

048621374

ABSTRACT:
A resistance heating device having a longitudinal axis and a substantially cylindrical graphite heating element with a connecting part for connection to an electric power source. The device has a sheath surrounding the graphite heating element, radially spaced therefrom and defining a gas tight chamber about the graphite heating element, the sheath being made from a refractory alloy sheet having angularly distributed longitudinal corrugations and an internal surface arranged to directly receive over its whole area radiation emitted by the graphite heating element when energized.

REFERENCES:
patent: 2917814 (1959-12-01), Ruckelshaus
patent: 3835296 (1974-09-01), Middough et al.
patent: 4412126 (1983-10-01), Brockway
patent: 4536642 (1985-08-01), Hamster et al.

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