Self-checking circuit arrangement for operation of a...
Self-regulating, axle-mounted electrical generation device
Sensing transducer
Sensor for railcar wheels
Sequential checking of railway control signals
Short headway communications based train control system
Shunt enhancement logic circuit
Signal processing system
Signal receiving apparatus for a vehicle control system
Signal system for high speed trains
Signal threshold responsive apparatus
Signal transmission arrangements for railroad interlockings
Signaling systems for single track railroads
Signalling system
Signals at highway crossings for high speed trains
Simplified cab signal receiver circuit
Solid state railroad lights/gate controller
Solid-state, synchronous detector railroad track relay device
Spacing control of vehicles on a track
Speed decoding and speed error determining control apparatus...