US PATENT SUBCLASS 315 / 261
.~.~ Auxiliary starting electrode-type discharge device load

Current as of: June, 1999
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315 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS

246  DF  PULSATING OR A.C. SUPPLY {10}
260  DF  .~ Plural cathode and/or anode discharge device load {2}
261.~.~ Auxiliary starting electrode-type discharge device load {3}
262  DF  .~.~.~> Transformer or auxiliary winding in the auxiliary electrode circuit
263  DF  .~.~.~> Inductance or potential surge generator in the auxiliary electrode circuit
264  DF  .~.~.~> Impedance in the auxiliary electrode circuit

DEFINITION

Classification: 315/261

(under subclass 260) Systems wherein the electric discharge device is provided with at least one principal anode and at least one principal cathode and an auxiliary discharge electrode.

SEE OR SEARCH THIS CLASS, SUBCLASS:

194, for this subject matter where the system includes means to shift the phase of the current supplied to the auxiliary starting electrode with respect to the current flowing in the principal electrode circuit.

268, and indented subclasses, for systems wherein the discharge device is provided with an auxiliary electrode

placed adjacent one of the principal electrodes, usually the cathode, and having the auxiliary electrode connected to a source of potential so that an electrostatic field is created near the principal electrode to facilitate initiating the discharge, the electrostatic electrode being arranged with respect to the principal electrode that there is no flow of discharge current to the electrostatic electrode. In such systems, the discharge electrodes are usually enclosed in a vitreous envelope and the auxiliary control electrode is placed on the outside of the envelope near the cathode.

335, and indented subclass, and the subclasses specified in the notes to the definition of these subclasses, for other systems under the class definition wherein the load device is provided with an auxiliary starting electrode.

SEE OR SEARCH CLASS 313, Electric Lamp and Discharge Devices,

592+, 594, 595+, and 601+ for discharge devices which are provided with an envelope containing a gas or vapor and which have an auxiliary starting electrode, and subclasses 306+ for other discharge devices which have an auxiliary starting electrode.

323, Electricity: Power Supply or Regulation Systems,

227, and 291 for electronic tube regulators. See Lines With Other Classes and Within This Class in the class definition of Class 323.