(under the class definition) Subject matter combined with switch means, which may be of the electromechanical or electronic tube type (vacuum, gas, or vapor tubes), to disable or discontinue the operation of the amplifier automatically in response to a predetermined condition.
(1) Note. Miscellaneous gating circuits are classified in Class 327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems, subclasses 365+ unless significant details of an amplifier as classified in the class definition of this class are claimed when classification is in this class.
SEE OR SEARCH THIS CLASS, SUBCLASS:
65+, for specific structure involved in the amplifier including structure involving switching means.
127+, for amplifiers having means to control power supply or
bias voltage.
SEE OR SEARCH CLASS 200, Electricity: Circuit Makers and Breakers, appropriate subclasses, for switches, per se.
307, Electrical Transmission or Interconnection Systems,
112+, for electrical transmission or interconnection switching systems.
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,
365+, for miscellaneous gating circuits.
361, Electricity: Electrical Systems and Devices,
1+, for electrical systems and devices with safety and protection means including those involving disabling switching means; subclasses 139+ for circuits for electric relays.
