US PATENT SUBCLASS 314 / 114
.~ With control of the electromagnet circuit

Current as of: June, 1999
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314 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES: CONSUMABLE ELECTRODES

113  DF  ELECTROMAGNETIC OPERATOR AND/OR FEED-CONTROLLING {3}
114.~ With control of the electromagnet circuit {2}
115  DF  .~.~> With current or voltage regulator {1}
117  DF  .~.~> Shunt magnet control {1}

DEFINITION

Classification: 314/114

(under subclass 113) Subject matter provided with means (including switching arrangements not provided for by preceding subclasses) for controlling the current or voltage supplied to the electromagnet coils.

(1) Note. Where the electromagnetic operating or controlling means includes one or more coils which are in series and/or in shunt with the discharge electrodes, and no means, other than the variations in the impedance of the electric discharge, are provided to control the flow of current in the series and/or shunt circuit, the patent is excluded from this subclass and the indented subclasses, and will be found in subclass 113 or subclasses 119-128 below.

(2) Note. Continue the search in subclasses 24, 61, 63, 67, 71, 73, 77, 78, and 79 and indented subclasses of this class.

SEE OR SEARCH THIS CLASS, SUBCLASS:

10, and indented subclasses, for consumable electrode discharge devices having electromagnetic means for operating and/or controlling the operation of the feed regulating mechanism and provided with means to place a shunt about or to open the circuit of the electromagnet when the electrode is consumed or fails to maintain the discharge.

SEE OR SEARCH CLASS

361, Electricity: Electrical Systems and Devices, 139+, for electromagnet circuits of general application.