US PATENT SUBCLASS 373 / 31
.~.~.~ Multi-chamber

Current as of: June, 1999
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373 /   HD   INDUSTRIAL ELECTRIC HEATING FURNACES

27  DF  GLASS FURNACE DEVICE {2}
29  DF  .~ Joule effect heating {4}
30  DF  .~.~ Furnace body detail {1}
31.~.~.~ Multi-chamber {1}
32  DF  .~.~.~.~> With heating between chambers

DEFINITION

Classification: 373/31

Multichamber:

(under subclass 30) Furnaces which are composed of at least two discrete interconnected sections.

(1) Note. For example, melting and refining section, or melting and delivery zones.

SEE OR SEARCH THIS CLASS, SUBCLASS:

78, for plural arc furnace units operating sequentially on the same charge.

80, for arc furnace charge preheating.

144, for induction furnaces with plural heating elements operating sequentially on a charge.