Electric furnace heater

Details Electric furnace heater Electric furnace heater

1975-09-15

1977-03-08

Envall, Jr., R. N.

Electric heating

Microwave heating

Tunnel furnace

219532, 338279, 338283, H05B 306

Patent

active

040113957

ABSTRACT:
A generally rectangular, self-supporting, unitary high temperature electrical resistance heater adapted for generally horizontal suspension within a high temperature furnace in which the heating element is composed of a flat resistor ribbon folded to form a series of continuous and substantially parallel beam-like heater segments disposed in grate-like fashion. The ribbon heater segments are retained in their parallel configuration by a plurality of refractory insulators disposed between and supported solely by the beam-like segments. The resulting furnace heater offers advantages of light weight, high radiation efficiency and minimum thermal inertia. FIELD OF THE INVENTION

REFERENCES:
patent: 1432442 (1922-10-01), Collins
patent: 1719888 (1929-07-01), Ipsen
patent: 1872942 (1932-08-01), Hanson
patent: 2277912 (1942-03-01), Johnson et al.
patent: 3697923 (1972-10-01), Griffes

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