US PATENT SUBCLASS 373 / 70
.~.~ With power regulation

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

60  DF  ARC FURNACE DEVICE {9}
67  DF  .~ Ingot remelting {3}
70.~.~ With power regulation

DEFINITION

Classification: 373/70

With power regulation:

(under subclass 67) Subject matter including means to control the arc heating capability either, by maintaining a desired electrical power input, or by maintaining a desired arc length.