Thermal distortion free viewing of a heated cavity

Details Thermal distortion free viewing of a heated cavity Thermal distortion free viewing of a heated cavity

1989-04-17

1990-06-05

Paschall, M. H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219506, 219494, 219522, 373166, 156601, 422249, 126190, 126200, H05B 102

Patent

active

049316249

ABSTRACT:
High temperature furnaces are described containing a movable viewing window that is heated so that the work charge can be scanned along the length of the furnace without creating a thermal disturbance. A system is also disclosed for controlling the operation of the furnace based on comparison of viewed images with stored sample images.

REFERENCES:
patent: 3865554 (1975-02-01), Wenckus et al.
patent: 4210120 (1980-07-01), Ritopecki
patent: 4318769 (1982-03-01), Sachs
patent: 4660149 (1987-04-01), Lissalde et al.
patent: 4707586 (1987-11-01), Voss et al.
patent: 4794263 (1988-12-01), Katsuoka et al.
patent: 4822449 (1989-04-01), Motakef

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