US PATENT SUBCLASS 315 / 335
.~.~ Auxiliary starting electrode-type discharge device

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


315 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS

326  DF  DISCHARGE DEVICE LOAD {8}
334  DF  .~ Plural cathode and/or anode discharge device load {4}
335.~.~ Auxiliary starting electrode-type discharge device {1}
336  DF  .~.~.~> Plural auxiliary starting electrode

DEFINITION

Classification: 315/335

(under subclass 334) Systems wherein the discharge device is provided with at least one principal anode and at least one

principal cathode and an auxiliary discharge electrode with the auxiliary electrode connected in the circuit so that the discharge is initiated between the auxiliary electrode and one of the principal electrodes, the auxiliary discharge conditioning the discharge space between the principal electrodes so that a discharge between the principal electrodes can be established.

SEE OR SEARCH THIS CLASS, SUBCLASS:

60, where the discharge device is structurally combined with a circuit impedance which is connected between the auxiliary starting and one of the principal electrodes.

168, where the auxiliary starting electrode is supplied with current from a different source of current than that which supplies the current to the principal electrodes.

194, and indented subclasses, where the auxiliary starting electrode is used as a discharge control electrode, and the auxiliary starting electrode circuit includes phase shifting means to shift the phase of the current in the auxiliary electrode circuit with respect to the current in the principal electrode circuit.

203, and indented subclass, where the auxiliary starting electrode circuit includes a discharge device or rectifier. 234, where the auxiliary starting electrode circuit includes a condenser.

261, and indented subclasses, where the discharge device is supplied with pulsating or alternating current.

330, and indented subclasses, where the auxiliary starting electrode is designed to physically contact one of the principal electrodes to initiate the discharge.

337, for systems wherein one or more of the plural cathodes or of the plural anodes has a potential impressed thereon which is of a different magnitude from the potential impressed upon another electrode of the same type.

349, and indented subclasses, for other systems provided with discharge control means for controlling the initiation of the discharge in the discharge device. These subclasses include 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 so 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.

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 an atmosphere of gas or vapor and which have an atmosphere of gas or vapor and which have an auxiliary starting electrode, and subclasses 306+ and the subclasses specified in the Notes thereto for other discharge devices which have an auxiliary starting electrode.

314, Electric Lamp and Discharge Devices: Consumable Electrodes,

34, for consumable electrode discharge device systems, the consumable electrode discharge device being provided with 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, "Electronic Tube Systems," in the class definition of Class 323.