(under subclass 536) Subject matter in which means are provided for making and breaking the circuit intermittently or repetitiously.
SEE OR SEARCH CLASS
200, Electricity: Circuit Makers and Breakers,
19.01, 19.4 for structure of periodic switches, per se.
307, Electrical Transmission or Interconnection Systems,
96, for intermittent regulatory interruption of an electrical system, and subclass 132 for periodically or repetitiously making and breaking an electric circuit. 322, Electricity: Single Generator Systems,
70, for generator systems having periodic or repetitious circuit making and/or breaking of the field circuit of an electric generator.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,
87, for electromagnetically operated periodic switches.
