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Signalling Primers and Educational Videos

Tappet Locking

A V Morton, Signalling Engineer of the London Midland & Scottish Railway at Crewe once described tappet locking as something simple but as annoying as a crossword puzzle to work out. In this video Charles Weightman explains with the aid of a wooden demonstration unit, just how the mixture of locks and releases works to enforce safe working of traffic.

This video is intended for viewing at a maximum screen resolution of 1440 pixels wide by 1080 pixels high. Please be aware that viewing at a larger size may result in a loss of clarity and a 'grainy' appearance.

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Video Credits

Filmed by: George Duncan & Richard Pulleyn
Filmed in: 2017
Narrator: Charles Weightman assisted by Richard Pulleyn
Video Editor: George Duncan