US Patent Class 246-- RAILWAY SWITCHES AND SIGNALS-- MAIN HEADINGS

US Patent Class 246
RAILWAY SWITCHES AND SIGNALS-- Main Headings

		CLASS NOTES
1 R	DF	MISCELLANEOUS {1}
2 R	DF	TRAIN DISPATCHING {7}
19	DF	STAFF AND TABLET SYSTEMS
20	DF	BLOCK-SIGNAL SYSTEMS {4}
108	DF	TIME INDICATION, AUTOMATIC {2}
111	DF	GRADE-CROSSING TRACK PROTECTION {3}
118	DF	DRAWBRIDGE PROTECTION {1}
120	DF	ROADWAY-DEFECT PROTECTION {1}
122 R	DF	TRAIN-POSITION INDICATION {3}
125	DF	ELECTRIC AUTOMATIC HIGHWAY SIGNALS, MINE DOORS, AND GATES {3}
131	DF	INTERLOCKING {8}
164	DF	SLOTTING AND CONTROL {1}
166	DF	PILOT OR SIGNAL CARS
166.1	DF	SIGNALLING BETWEEN OCCUPANTS OF A TRAIN
167 R	DF	CAB SIGNAL OR TRAIN CONTROL {20}
208	DF	CAR-DISPLAYED CROSSING SIGNALS
209	DF	PASSENGERS' STATION SIGNALS
210	DF	TORPEDO MECHANISM {4}
217	DF	AUDIBLE SWITCH AND SIGNAL INDICATORS
218	DF	ELECTRIC ACTUATION {9}
257	DF	FLUID-MOTOR ACTUATION {3}
262	DF	MECHANICAL-MOTOR ACTUATION {1}
264	DF	POINT THROWERS {4}
270 R	DF	VEHICLE-ENERGY ACTUATION {11}
374	DF	SAFETY SIDINGS
375	DF	CONTINUOUS-RAIL CROSSING {5}
382	DF	SWITCH-CONNECTED FROGS {6}
393	DF	SWITCH STANDS {8}
415 R	DF	SWITCHES {21}
454	DF	CROSSINGS, FROGS, AND MATES {11}
473 R	DF	SIGNALS {12}
489	DF	MANUAL ACTUATION
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		DIGESTS
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DIG 1	DF	Radiant energy devices
DIG 2	DF	Thermal sensing devices