(under the class definition) Devices for making and breaking the circuit in predetermined and fixed manner in accordance with code signals and involving a specific structure for each key or other transmitting element, whereby each transmits a different signal, thereby enabling a code or a message to be transmitted by their successive action at the will of the operator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
17, for automatic transmitters.
SEE OR SEARCH CLASS
340, Communications: Electrical,
307+, for transmitters utilized with signal box systems.
341, Coded Data Generation or Conversion, 20+, and 173+ for a pulse code transmitter.
361, Electricity: Electrical Systems and Devices,
245, for pole changing transmitters and pole changers of the magnet and lever type energized by a local circuit controlled by a manually operated key or equivalent.
