US PATENT SUBCLASS 315 / 194
REGULATION OF THE CONTROL CURRENT AND/OR POTENTIAL APPLIED TO DISCHARGE CONTROL DISCHARGE DEVICE LOADS BY PHASE SHIFTING MEANS

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

194REGULATION OF THE CONTROL CURRENT AND/OR POTENTIAL APPLIED TO DISCHARGE CONTROL DISCHARGE DEVICE LOADS BY PHASE SHIFTING MEANS {2}
195  DF  .~> Plural load device systems {2}
199  DF  .~> Discharge control discharge device in the control circuit

DEFINITION

Classification: 315/194

(under the class definition) Systems having a load device which is a discharge device provided with a discharge control means, such as a grid electrode, an electromagnet for influencing the space discharge, or an auxiliary starting electrode, the discharge device being either (1) supplied with a pulsating and/or alternating current and/or (2) the cathode-anode circuit of the discharge device being so connected in the system that a pulsating and/or alternating current flows therein; the system including means to apply current and/or potential to the control means, the circuit controlling the application of the control potential including phase shifting means, so that the control current and/or potential may be applied to the control means in time phase relation to the pulsating and/or alternating current in the supply circuit and/or in the cathode-anode of the load device.

(1) Note. Neither the current and/or potential applied to the discharge device nor the control means need be a pulsating and/or alternating current and/or potential. For example, the load device may be supplied with discharge current from a source of unidirectional current with the system so arranged that a circuit connecting the cathode-anode of the discharge device has a pulsating current flowing therein, the control means being supplied with unidirectional current, the system being provided with circuit elements including phase shifting means responsive to the pulsating current in the cathode-anode circuit to control the time of application of the unidirectional current and or potential to the control means.

(2) Note. When the current supply for the discharge device is an alternating or pulsating current, and the discharge device is provided with an auxiliary starting electrode which is supplied with pulsating or alternating current which is out of phase with the alternating current in the discharge supply circuit, the patent is classified as a polyphase supply system in subclass 137 and indented subclasses, note especially subclasses 145 and 147. Where the system includes means to supply the auxiliary starting electrode with pulsating current from the supply circuit, and the auxiliary electrode circuit includes phase shifting means to shift the phase of the alternating current in the auxiliary electrode circuit with respect to the current in the supply circuit, the patent is classified in subclass 140 as a phase multiplying system. Where the claims only recite a control device for the discharge device, even though an auxiliary starting electrode is disclosed, the patent is classified in this subclass (194) or the indented subclasses.

(3) Note. Where the discharge device is supplied with discharge current from a source of pulsating and/or alternating current and the control means is supplied with a

pulsating and/or alternating current and/or potential, the current and/or potential in the control circuit need not have its phase shifted with respect to the supply current, but the phase shifting means may only determine the time of application of the control current and/or potential to the control means with respect to the current wave of the supply current.

(4) Note. Systems wherein the current and/or potential supplied to the control means is merely varied in magnitude, the magnitude of the control current and/or potential with respect to the supply current for the load device determining the time at which the control means becomes effective to alter the operation of the discharge device are not included. For such systems, see the subclasses under "SEARCH THIS CLASS, SUBCLASS" below. SEE OR SEARCH THIS CLASS, SUBCLASS:

137, see note (2) above.

140, see note (2) above.

145, see note (2) above.

147, see note (2) above.

335, and indented subclass, and the subclasses specified in the notes to the definitions of these subclasses, where the discharge control means for the discharge device load device is an auxiliary starting electrode, the system including means to vary the magnitude of the current and/or potential supplied to the auxiliary starting electrode,

341, and indented subclasses, and the subclasses specified in the notes to the definition of those subclasses, where the discharge device load device is provided with a plurality of discharge control means, the system including means to vary the magnitude of the control current and/or potential supplied to at least one of the control means.

344, and indented subclasses, and the subclasses specified in the notes to the definition of those subclasses where the discharge device load device is provided with an electromagnet for influencing the discharge, and the system includes means to vary the magnitude of the current supplied to the electromagnet.

349, and indented subclasses and the subclasses specified in the notes to the definition of those subclasses for miscellaneous systems under the class definition wherein the load device is a discharge control discharge device and the system includes means to vary the magnitude of the current and/or potential supplied to the load device.

SEE OR SEARCH CLASS

323, Electricity: Power Supply or Regulation Systems, 237, 300, and 320, for systems for controlling the magnitude of the current or voltage in a single circuit by means of a discharge device having a discharge control device (e.g., grid), the discharge device circuit including means for shifting the phase of the potential in the discharge control device circuit with respect to the potential in the output circuit.

363, Electric Power Conversion Systems,

118, and the subclasses mentioned in the notes thereto, for electronic tube current conversion systems wherein the control of the electronic tube includes phase control of potential applied to the discharge control means. The systems in Class 363 are very closely analogous to the systems in this and the indented subclasses. For the line between Class 363 and this class (315), see Lines With Other Classes and Within This Class in the class definition of Class 363.