US PATENT SUBCLASS 266 / 256
.~.~.~.~ Bell furnace

Current as of: June, 1999
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266 /   HD   METALLURGICAL APPARATUS

249  DF  MEANS TREATING SOLID METAL {5}
251  DF  .~ By contact with gas {2}
252  DF  .~.~ With heating means {4}
255  DF  .~.~.~ Having work contained in separate, noncommunicating chamber, e.g., muffle {1}
256.~.~.~.~ Bell furnace

DEFINITION

Classification: 266/256

(under subclass 255) Device wherein the receptacle containing or protecting the article during treatment is open-bottomed and is lowered over stationary article prior to said treatment.

SEE OR SEARCH THIS CLASS, SUBCLASS:

263, for a means for treating a solid metal within a bell-type hood.