US PATENT SUBCLASS 315 / 291
CURRENT AND/OR VOLTAGE REGULATION

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

291CURRENT AND/OR VOLTAGE REGULATION {7}
292  DF  .~> Keyboard operated or pattern controlled regulator
293  DF  .~> Pre-selectable regulator systems
294  DF  .~> Plural load device regulation {4}
299  DF  .~> Plural regulators {2}
302  DF  .~> Current generator control {2}
306  DF  .~> Regulator in shunt to the load device
307  DF  .~> Automatic regulation {4}

DEFINITION

Classification: 315/291

(under the class definition) Systems which include means to regulate the current and/or voltage supplied to the load device.

(1) Note. This subclass does not include systems wherein the load device is a space discharge device having a discharge control means, such as a control grid, electromagnet or auxiliary starting electrode, and the only means for regulating the discharge current is the discharge control means. For such systems, see subclass 349 and

indented subclasses of this class and the subclasses specified in the notes to the definition of those subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

36, for devices which include a plurality of series connected discharge devices and an electrical circuit element, all of which are structurally combined in a single unitary device, one of the discharge devices and/or the circuit element forming means to regulate the flow of current to the other discharge device.

71, for miscellaneous discharge devices which have structurally combined therewith, so as to form a unitary device, an electrical impedance.

106, and 107, wherein the discharge device in the system is provided with a thermionic cathode designed to be heated by the passage of current through it or an indirectly heated cathode, the system including means to supply the cathode or cathode heater circuit with current, the cathode or cathode heater circuit including voltage regulating means for the cathode or cathode heater circuit. 116, for systems where the load device is provided with electric heating means, the heater circuit including a regulator for the heating current.

151, for systems wherein the load device circuit includes a radiant energy responsive means (photocell), the load device irradiating the radiant energy responsive device and thereby regulating the current flow in the load device circuit.

156, wherein the supply circuit of the load device includes a discharge device to control the supply of current to the load device, the discharge device being controlled by radiant energy responsive means (photocell).

158, for miscellaneous systems wherein the regulating means for controlling the current flow to the load device is controlled by radiant energy responsive means (photocell).

171, for systems where there are plural sources of current supply for the load device, one of the supply circuits including a discharge device and/or rectifier for controlling the supply of current from one of the current sources to the load device.

200, for systems where there is an electric discharge device or rectifier in the supply circuit of the load device to control the flow of current to the load device.

224, for systems wherein the supply circuit for the load device includes a periodic switch and an impedance or current regulator.

277, for systems wherein the pulsating or alternating current is supplied to the load device and there are a plurality of transformers in the supply circuit, the transformers including means to regulate the supply of current to the load device.

279, for systems wherein pulsating or alternating current is supplied to the load device, a transformer being included in the supply circuit and a current regulating means being included in the primary circuit of the transformer.

280, for systems wherein pulsating or alternating current is supplied to the load device, a transformer being included in the supply circuit, the transformer being connected in the circuit so that it may be converted into an inductance.

281, for systems wherein pulsating or alternating current is supplied to the load device, a movable core and coil-type transformer being connected in the supply circuit of the load device. 282, for miscellaneous systems wherein pulsating and/or alternating current is supplied to the load device, a regulating transformer being included in the supply circuit.

287, for this subject matter wherein the regulator is a periodic-type current and/or voltage regulator.

289, for miscellaneous systems where there is an inductance in the supply circuit and see the notes to such subclass.

349, see (1) "Note." above.

SEE OR SEARCH CLASS

314, Electric Lamp and Discharge Devices: Consumable Electrodes,

135, for systems provided with means to regulate the current or voltage supplied to discharge devices of the consumable electrode type.

322, Electricity: Single Generator Systems, appropriate subclasses for generator regulating systems, particularly

17+, for automatic generator regulating systems.

323, Electricity: Power Supply or Regulation Systems,

220, 354, for miscellaneous systems for controlling the magnitude of the current and/or voltage in a single circuit.

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems, appropriate subclasses for miscellaneous distribution systems which include regulators. 336, Inductor Devices, appropriate subclasses for the

structure of transformers and inductive reactors, including tap-change transformers and saturable reactors.

338, Electrical Resistors,

68+, for mechanically variable electrical resistors, such as rheostats and potentiometers.

361, Electricity: Electrical Systems and Devices,

291+, for the structure of variable condensors.

363, Electric Power Conversion Systems,

74+, for current conversion systems having automatic voltage and/or current magnitude control; and subclass 149 for phase conversion systems having automatic voltage magnitude and/or phase control.

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

91+, for X-ray tube systems provided with means for maintaining the discharge rate in the tube constant, and subclass 103 for X-ray tube systems which include a current or voltage regulating means.