(under subclass 270) Systems provided with means to apply a pulsating and an alternating potential or two or more different pulsating or alternating potentials to the discharge control means.
(1) Note. In systems coming within the definition of subclass 268 wherein a transformer is provided which has two or more primary windings, each energized by pulsating or alternating current and having the secondary connected to the control circuit, the patent is placed in subclass 274 below and not in this subclass. Where two or more transformers are provided and the secondary windings are connected either in series or parallel, with the resultant potential impressed upon the control means, the patent is placed in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
160, and indented subclasses, for plural power supplies.
274, see (1) "Note." above.
351, for other systems under the class definition provided with means to supply two or more different pulsating and/or alternating currents to the control means of a discharge control discharge device load.
SEE OR SEARCH CLASS
323, Electricity: Power Supply or Regulation Systems,
227, and 291 for electronic tube regulators. See Lines With Other Classes and Within This Class in the class definition of Class 323.
