Drying and gas or vapor contact with solids – Apparatus – Houses – kilns – and containers
Patent
1987-08-07
1988-08-23
Warner, Steven E.
Drying and gas or vapor contact with solids
Apparatus
Houses, kilns, and containers
432 66, 432 77, F26B 1710
Patent
active
047650680
ABSTRACT:
The present arrangement is a hot zone structure for a vacuum furnace which includes an endlessly shaped outside wall (e.g. shaped substantially into a circle) preferably made of stainless steel. Disposed next to the inside surface of the outside wall is a layer or layers of heat insulating material means such as graphite felt. Further disposed next to the inside surface of the insulating material means is an inside wall preferably made of graphite. The inside wall defines the chamber of the hot zone structure into which items to be heat treated are placed. Passing through the outside wall, through the layer of heat insulating material, and through the inside wall are many continuous apertures. At the end of each continuous aperture there is located a threaded terminal piece and threaded into each terminal piece is a graphite nozzle. Accordingly there is a plurality of graphite nozzles passing from outside the outside wall of the hot zone structure through into the inside chamber of the hot zone structure. Through the graphite nozzles gasses can be passed from outside of the hot zone structure to the inside thereof for quenching purposes. The graphite nozzles are each removable and do not freeze or bind in the terminal pieces as do nozzles made of other materials.
REFERENCES:
patent: 4395832 (1983-08-01), Jones et al.
Cleaver William E.
Vacuum Furnace Systems Corporation
Warner Steven E.
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