US PATENT SUBCLASS 373 / 25
.~.~ Control system
Current as of:
June, 1999
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373 /
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INDUSTRIAL ELECTRIC HEATING FURNACES
18
DF
PLASMA FURNACE DEVICE
{3}
22
DF
.~ Direct furnace (i.e., plasma flame impinges on the melt) {3}
25
.~.~ Control system
DEFINITION
Classification: 373/25
Control system:
(under subclass 22) Subject matter including means to regulate the operation of the furnace.
SEE OR SEARCH THIS CLASS, SUBCLASS:
25, for control systems in plasma remelting furnaces.
40, for electrical system regulation of glass furnaces.
49+, for power supply control in electroslag remelting furnaces.
70, 77 and 104+, for control, or regulation of arc furnace devices.
110+, and 135, for control, or regulation of resistance furnace devices.
140+, 148, and 149+, for control, or regulation of induction furnace devices.
