US PATENT SUBCLASS 246 / 175
.~.~ Code signal

Current as of: June, 1999
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246 /   HD   RAILWAY SWITCHES AND SIGNALS

167 R  DF  CAB SIGNAL OR TRAIN CONTROL {20}
174  DF  .~ Highway or station, automatic {1}
175.~.~ Code signal

DEFINITION

Classification: 246/175

(under subclass 174) Subject matter, the signal consists of a succession of long and short whistle-blasts or their equivalent, resembling a letter of the Morse teles:graphic code.

SEE OR SEARCH THIS CLASS, SUBCLASS:

167, and all subclasses mentioned in the search notes appended thereto, for cab and control features.

SEE OR SEARCH CLASS

178, Telegraphy,

79+, for telegraph-code transmitters.