(under subclass 72) Subject matter wherein the space discharge device is provided with a discharge control device in addition to the load current carrying electrodes.
(1) Note. The control device controls the conductivity of the space discharge device. It may take such forms as an electrostatic grid, an electromagnetic winding for a magnetic field in which the discharge is controlled or an igniting device for initiating the flow of current in a vapor or gas discharge device.
SEE OR SEARCH CLASS
315, Electric Lamp and Discharge Devices: Systems,
349+, and the subclasses specified in the notes to the definition of those subclasses for systems for controlling the operation of gas or vapor discharge devices (including lamps) of the discharge control type.
318, Electricity: Motive Power Systems,
677+, particularly subclass 682, for position servomechanisms including space discharge type controls subclasses 700+ for induction motor control having primary or armature circuit control by space discharge devices, subclasses 727+ for induction motor control having secondary circuit by space discharge devices, subclasses 505+, for motor control by space discharge devices in armature circuit, and subclass 532 for motor control by space discharge devices having control elements in field circuit. 323, Electricity: Power Supply or Regulation Systems,
227, and 291, for space discharge regulating systems wherein the space discharge device is provided with a discharge control element.
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,
518+, for miscellaneous control circuits utilizing an electronic space discharge device.
388, Electricity: Motor Control Systems, art collections 913+ for motor control systems including space discharge devices.
