US PATENT SUBCLASS 373 / 39
.~.~ Electrical system

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}
39.~.~ Electrical system {2}
40  DF  .~.~.~> Regulation
41  DF  .~.~.~> Electrode arrangement (e.g., array)

DEFINITION

Classification: 373/39

Electrical system:

(under subclass 29) Subject matter including means to supply electrical power to the furnace.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47+, for electroslag remelting power supply system details.

102+, for arc furnace power supply system details.

147+, for induction furnace power supply system details.

SEE OR SEARCH CLASS

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

365+, for miscellaneous gating circuits, subclasses 509+ for miscellaneous externally effected circuits, subclasses 518+ for miscellaneous control circuits, and subclasses 538+ for miscellaneous bias circuits with regulating.