Furnace enclosure having a clear viewpath

Details Furnace enclosure having a clear viewpath Furnace enclosure having a clear viewpath

1989-07-06

1990-04-17

Envall, Jr., Roy N.

Industrial electric heating furnaces

Electron beam furnace device

373 12, 373 49, 373104, 373 25, 21912154, 21913001, H05B 700

Patent

active

049187058

ABSTRACT:
A clear optical path is provided in a furnace in which high intensity top surface heating is carried out. The path extends through a viewport to the interior of the furnace chamber. The path extends to a clear metal mirror surface and from the mirror surfaced to other portions of the furnace chamber which are not viewable directly through the viewport.

REFERENCES:
patent: 3371140 (1968-02-01), Wynne
patent: 4435818 (1984-03-01), Stenzel et al.
patent: 4484059 (1984-11-01), Lillquist

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