.~ By means of space-discharge device in field circuit
DEFINITION
Classification: 318/532
(under subclass 521) Subject matter in which the principal electrodes (e.g., cathode and anode) of a space-discharge device is connected to the field winding circuit of an electric motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
505, and the subclasses specified in the Notes thereto, for motor systems having space-discharge devices in the armature or primary circuit of the electric motor.
818, for space-discharge devices in the secondary circuit of an induction motor.
SEE OR SEARCH CLASS
315, Electric Lamp and Discharge Devices: Systems, appropriate subclasses for means for controlling and supplying electric energy to gas-filled space-discharge devices, per se. 322, Electricity: Single Generator Systems,
72, for generator systems having the generator field circuit controlled by means of space discharge devices.
323, Electricity: Power Supply or Regulation Systems,
227, and 291 for electric space discharge device systems for voltage magnitude control.
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems, appropriate subclasses for miscellaneous control circuits wherein a space discharge device is the controlling element.
