US PATENT SUBCLASS 361 / 139
CONTROL CIRCUITS FOR ELECTROMAGNETIC DEVICES

Current as of: June, 1999
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361 /   HD   ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES

139CONTROL CIRCUITS FOR ELECTROMAGNETIC DEVICES {7}
140  DF  .~> Including compensation for thermal change of electromagnetic device
141  DF  .~> Including superconductivity
142  DF  .~> Including housing
143  DF  .~> Systems for magnetizing, demagnetizing, or controlling the magnetic field {5}
157  DF  .~> Including instrument (e.g., meter-relay) {1}
159  DF  .~> Including means for using, or compensating for, the induced EMF of the electromagnetic device
160  DF  .~> For relays or solenoids {11}

DEFINITION

Classification: 361/139

CONTROL CIRCUITS FOR ELECTROMAGNETIC DEVICES:

(under the class definition) Subject matter relating to control circuits for relays and other electromagnetic devices.

(1) Note. When the relay controls a particular device, classification is not in this subclass but is in the class that provides for the art environment. Note that many electrical and nonelectrical classes have disclosures which include, as part thereof, relay and electromagnet control circuits. Therefore, in appropriate instances, the search should extend to the class which relates to the environment in which the relay or electromagnet circuit might be found.

SEE OR SEARCH CLASS

178, Telegraphy, appropriate subclasses for television and telegraph systems utilizing electromagnets and relays. Note, particularly

70+, for telegraph code repeaters.

222, Dispensing, for dispensing devices utilizing electromagnetic actuators.

235, Registers,

61+, for electric calculators having relay type counting chains. 251, Valves and Valve Actuation,

129.01+, for electromagnetic valve operators.

307, Electrical Transmission or Interconnection Systems,

101, for miscellaneous remnant and residual magnetism control, subclass 104 for miscellaneous electromagnet and highly inductive systems, and subclasses 112+ for miscellaneous switching systems.

313, Electric Lamp and Discharge Devices,

153+, and 364+ for cathode-ray, lamp and space discharge devices having magnetic means.

314, Electric Lamp and Discharge Devices: Consumable Electrode, for arc lamps having electromagnet or relay means to control the arc. Note, for example,

78, 113+ and 135.

315, Electric Lamp and Discharge Devices: Systems,

399+, for cathode-ray tube deflecting circuits utilizing electromagnets.

318, Electricity: Motive Power Systems, appropriate subclasses for electric motor control systems utilizing electromagnets or relays. Note that any electromagnet is an electrothermal transducer and therefore it is an electric motor. Also, see 492, for electric motor systems having means to dissipate the magnetic energy of the electric motor.

322, Electricity: Single Generator Systems, appropriate subclasses, especially

17+, for generator systems having relay control means.

323, Electricity: Power Supply or Regulation Systems, appropriate subclasses for voltage control and phase control systems having relays and electromagnets.

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems, appropriate subclasses for miscellaneous nonlinear active device circuits.

331, Oscillators, appropriate subclasses for self-sustained electric wave generator systems of the nondynamoelectric type.

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets, appropriate subclasses for electromagnetic relays, per se.

379, Telephonic Communications, appropriate subclasses for telephone systems utilizing electromagnets and relays.

600, Surgery,

9+,.

607, Surgery: Light, Thermal, and Electrical Application,

1,.