US PATENT SUBCLASS 178 / 83
.~ Rotary contact

Current as of: June, 1999
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178 /   HD   TELEGRAPHY

79  DF  CODE TRANSMITTERS {5}
83.~ Rotary contact {1}
84  DF  .~.~> Drum

DEFINITION

Classification: 178/83

(under subclass 79) Code-transmitters in which one of the contact members is arranged to rotate or revolve.

SEE OR SEARCH CLASS

340, Communications: Electrical,

309, and 535 for make and break wheel type signal box system transmitters.

341, Coded Data Generation or Conversion,

20+, and 173+ for a pulse code transmitter.