Carriage running control system

Centralized traffic control system for railroads

Chain of custody

Check-in, check-out track circuit arrangement

Circuit arrangement for controlling the propulsion, braking...

Circuit controller

Circuit controlling instrument

Circuit controlling instrument

Circuit for detecting unbalance of the traction current in a...

Circuits for controlling electric locks on railway track...

Code resetting device for a car-type transporter

Coded railway track circuit having reduced power standby...

Coded track circuit railway signaling systems

Coded track circuit signalling system

Coded track circuit signalling system

Coded track circuit signalling system

Color light signal using light emitting diodes

Combined high and low frequencies for track circuit

Communicating vital control signals

Communication systems between a trackway and vehicles