(under the class definition) Subject matter including a polyphase power supply for the energizing or bias voltage supply applied to any electrode or for a filament or for any heater for a cathode electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
114+, for amplifiers having unrectified power supply.
199, for amplifiers involving power or bias voltage supply. See the search notes thereunder.
SEE OR SEARCH CLASS
307, Electrical Transmission or Interconnection Systems, 13+, for plural load systems of the polyphase type.
310, Electrical Generator or Motor Structure, appropriate subclasses under
10+, for dynamoelectric machine structure of the polyphase type.
323, Electricity: Power Supply or Regulation Systems, appropriate subclasses for systems in which a single source of supply is connected to a single load and the system includes means for controlling only the magnitude of the current, the voltage, and/or the phase angle between the current and the voltage in the system. The single source may be a polyphase source.
336, Inductor Devices,
5+, for the structure of polyphase inductor devices.
363, Electric Power Conversion Systems, particularly
148+, for phase conversion systems from one number of phases to a different number of phases.
