US PATENT SUBCLASS 315 / 307
.~ Automatic regulation

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

291  DF  CURRENT AND/OR VOLTAGE REGULATION {7}
307.~ Automatic regulation {4}
308  DF  .~.~> Regulator responsive to plural conditions
309  DF  .~.~> Thermal responsive regulator
310  DF  .~.~> Shunted impedance-type regulator
311  DF  .~.~> Variable impedance-type regulator

DEFINITION

Classification: 315/307

(under subclass 291) Systems wherein the regulation of the

current or potential supplied to the load device is automatically controlled in response to some condition.

(1) Note. The conditions controlling the regulation may be the current or potential of the load device circuit, some condition of the load device such as the temperature of the load device, or the temperature of the atmosphere in which the load device is operating, or any other condition affecting the operation of the load device.

(2) Note. See the notes to subclass 291.

SEE OR SEARCH THIS CLASS, SUBCLASS:

278, for this subject matter where the supply circuit of the load device includes a three or more coil-type transformer for automatically regulating the supply of current to the load device.

291, see note (2) above. 297, for this subject matter where there are a plurality of load devices in the system.

301, for this subject matter where there are a plurality of automatic regulators in the system.

302, and indented subclasses, for this subject matter where the automatic regulators effect the operation of the supply current generating means.

306, for this subject matter where the automatic regulating means is connected in shunt relation to the load device.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems,

31+, for plural load circuit systems having means for automatically controlling the current or power therein.

322, Electricity: Single Generator Systems,

17+, for automatic generator regulation systems of general application.

323, Electricity: Power Supply or Regulation Systems,

234, 303, for systems for controlling the magnitude of the current and/or voltage in a single circuit by means of an automatically controlled impedance.

336, Inductor Devices, 30+, for the structure of transformers and inductive reactors which are designed to have their effective impedance varied in response to a condition.

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.

373, Industrial Electric Heating Furnaces,

102+, for electric arc furnace systems provided with current and/or voltage regulating means.