US PATENT SUBCLASS 373 / 104
.~.~ With power regulation

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

60  DF  ARC FURNACE DEVICE {9}
102  DF  .~ Power supply system {4}
104.~.~ With power regulation {1}
105  DF  .~.~.~> By changing arc length {1}

DEFINITION

Classification: 373/104

With power regulation:

(under subclass 102) Subject matter including means to control the electrical power to the arc.

(1) Note. Where the power to the arc is regulated without changing the arc length, the voltage is regulated by means of an induction regulator, or by changing the forms of connections used (i.e., top changing).