(under the class definition) Subject matter relating to the reversing of the polarity of an electric circuit.
(1) Note. This subclass relates to, for example, the reversing of polarity under the control of an external operator, or the reversing of polarity in a continuous pulsating manner.
16, for telegraph systems utilizing polarity reversing as an indication of the intelligence to be transmitted.
200, Electricity: Circuit Makers and Breakers, appropriate subclasses, particularly
19.06+, for electric switches which can be utilized to reverse polarity. 246, Railway Switches and Signals, appropriate subclasses, particularly
228, 232 and 242 for railway signalling systems utilizing polarity reversing as an indication of the intelligence to be transmitted.
307, Electrical Transmission or Interconnection Systems,
151, for this subject matter, and subclasses 112+ for miscellaneous switching systems, some of which reverse polarity.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,
87, for electromagnetically operated switches which may be utilized to reverse polarity.
363, Electric Power Conversion Systems, appropriate subclasses for conversion systems. Note
109, for conversion systems in which direct current is converted into alternating current by the action of a switch which reverses the polarity of the output circuit.