Westinghouse Brake and Signal Holdings Limited

Jonathan David Francis

Paul Robertshaw

A train detection mechanism for detecting the presence of a train on a section of track, the track section including first and second railsand delimited by first and second ends thereof, includes current injector for injecting current into the first rail at the first end of the section and current receiver for receiving current from the second rail at the first end of the section, and a shuntconnected between the first and second rails at the second end of the section, characterized in that the shunt includes a switchfor controlling current flow through the shunt, the switch being operable by the passage of a train.

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Chippenham, United Kingdom

Jonathan David Francis