(under the class definition) Systems having a periodic switch connected in the current supply circuit for the load device so as to periodically interrupt or vary the flow of current to the load device.
(1) Note. The periodic switch may be connected in shunt to the load device so as to periodically interrupt or vary the flow of current to the load device by completing a shunt circuit about the load device.
(2) Note. Some of the systems in this and the indented subclasses are ignition systems for supplying electrical energy to spark gaps of the spark plug type. For the line between this class and Class 123, Internal-Combustion Engines, subclass 146.5, Sparkers, see the notes to the class definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
72, for electric lamps having a periodic switch structurally combined therewith so as to form a unitary device.
172, where there are two sources of current supply for the load device, one of the supply circuits including a periodic switch.
186, where there are a plurality of load devices connected in series relation and the system includes a periodic switch. 246, and indented subclasses, for systems having no periodic switch wherein alternating or pulsating current is supplied to the load device. Note especially subclass 287 for systems where the source of supply may be direct current and a voltage regulator which periodically increases and decreases the current supplied to the load device is included in the supply system.
SEE OR SEARCH CLASS
123, Internal-Combustion Engines, see Note (2) above.
200, Electricity: Circuit Makers and Breakers,
19.01+, for periodic electric switches.
307, Electrical Transmission or Interconnection Systems,
96+, for circuit interrupting regulators.
322, Electricity: Single Generator Systems,
69+, for periodic interruption of generator field circuit and subclass 94 for interruption of generator armature circuit.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,
87+, for periodic electromagnetically operated switches. 337, Electricity: Electrothermally or Thermally Actuated Switches,
51, for periodically operated electrothermally actuated switches and subclasses 302+ for periodically operated thermal switches.
361, Electricity: Electrical Systems and Devices,
1+, for circuit interruption systems utilized for safety purposes.
363, Electric Power Conversion Systems,
106+, and subclass 177 for conversion systems wherein the convertor comprises a periodic switch.
