US PATENT SUBCLASS 315 / 246
PULSATING OR A.C. SUPPLY

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

246PULSATING OR A.C. SUPPLY {10}
247  DF  .~> With power factor control device
248  DF  .~> Induction-type discharge device load
249  DF  .~> Potential node-type discharge device load
250  DF  .~> Plural load device systems {5}
260  DF  .~> Plural cathode and/or anode discharge device load {2}
267  DF  .~> Electromagnetic influenced discharge device load
268  DF  .~> Discharge control discharge device load {5}
276  DF  .~> Transformer in the supply circuit {6}
283  DF  .~> Inductance in the supply circuit {1}
287  DF  .~> Periodic-type current and/or voltage regulator in the supply circuit

DEFINITION

Classification: 315/246

(under the class definition) Systems wherein the load devices in the system is supplied with either pulsating or alternating current or potential (but not both).

SEE OR SEARCH THIS CLASS, SUBCLASS:

57, for discharge devices which are structurally combined with a transformer so as to form a unitary device.

70, for load devices other than discharge devices which are structurally combined with a transformer so as to form a unitary device.

72, for load devices having combined therewith a periodic switch, the switch and load device being structurally combined so as to form a unitary device and the periodic switch periodically interrupting the current supplied to the load device.

97, and subclass 105 and the indented subclass, for systems under the class definition wherein the load device is a discharge device provided with either a thermionic cathode heated by the passage of electric current or an indirectly treated cathode, the cathode or the cathode heater being

supplied by a source of pulsating and/or alternating current. 105, see the reference to subclass 97, above.

137, and indented subclasses, for this subject matter where the system is a polyphase alternating current system.

156, where the system includes a source of pulsating and/or alternating current supply for the load device, a discharge device and/or rectifier being connected in the supply circuit, the discharge device or rectifier being controlled by a radiant energy sensitive device (photocell).

171, where the system includes a plurality of sources of current supply for the load device, one of the sources of current supply being a pulsating and/or alternating source and having a discharge device or rectifier in the supply circuit to the load device.

172, where the system includes a plurality of sources of current supply for the load device, one of the supply circuits including a periodic switch for periodically interrupting the supply of current to the load device.

174, where there are a plurality of diverse type pulsating and/or alternating current supplies for the load device, or both alternating and pulsating current supplies.

177, for this subject matter where there is a transformer in the power supply circuit, there being a load device in the primary circuit of the transformer and another load device in the secondary circuit.

186, for systems which include a plurality of series connected load devices, the supply circuit for the load devices including a periodic switch to periodically interrupt the supply of current.

194, for this subject matter where the load device is a discharge control discharge device, and phase shifting means are used to regulate the current and/or potential supplied to the discharge control means.

200, where the system includes a pulsating and/or alternating current supply source for the load device, the supply circuit including a rectifier and/or discharge device.

209, and indented subclasses, for systems which include a periodic switch in the supply circuit of the load device for periodically interrupting the supply of current to the load device.

227, and indented subclasses, for systems under the class definition wherein a condenser is included in the load device circuit so that the load device is energized periodically by the current discharged from the condenser.

SEE OR SEARCH CLASS

314, Electric Lamp and Discharge Devices: Consumable Electrodes, appropriate subclasses, for systems for supplying pulsating and/or alternating current to consumable electrode discharge devices, note especially

31, and 32.

378, X-Ray or Gamma Ray Systems or Devices,

106, and 107 for X-ray tube power supplies having pulse or A. C. output.