Part 1: Layout of Signal Connections - 32 minutes
An explanation of the main types of mechanical signal and of the mechanism which transmits movement from levers to signal.

Part 2: Maintenance of Signals and Connections - 32 minutes
The lineman and his assistant are shown carrying out regular inspection, cleaning and adjusting the parts of a typical mechanically operated signal system from the lever tail through the leadaway and wire run to the signals.

16mm & 35mm