Industrial electric heating furnaces – Resistance furnace device – With internal atmosphere control
Patent
1991-08-14
1993-11-30
Reynolds, Bruce A.
Industrial electric heating furnaces
Resistance furnace device
With internal atmosphere control
373113, 373130, 373135, 432 77, 432205, 432250, F27D 706
Patent
active
052672573
ABSTRACT:
A high temperature vacuum furnace has a circulating path external to the heating chamber for facilitating inert gas circulation during initial convection heating of a high temperature vacuum furnace. The heating chamber of the furnace and a surrounding cooling gas introduction chamber are within a metallic convection shroud in such a way that the space in between defines a heating gas circulation chamber for circulating heated inert gas during low temperature heating for accelerating the heating-up of the hot zone to its normal operating temperatures. Once the hot zone has reached a selected temperature, the inert gas is pumped out and the furnace then operates in a vacuum. Quenching is achieved by introducing cooling gas into the heating chamber via nozzles through the heating chamber walls.
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Grier John K.
Jhawar Suresh C.
Mercer Michael T.
Grier-Jhawar-Mercer, Inc.
Hoang Tu
Reynolds Bruce A.
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