The drive to the leadscrew was taken from the changewheels by a shaft to a dog clutch immediately below the bed gap. From there the shaft continued to the end of the bed - where it emerged to drive upwards to the leadscrew though a pair of gears.
On the early lathes the tailstock clamped to the same dovetail ways used by the saddle. The clamping plate was machined from a block of steel, but from 1906 was replaced by an iron casting. Note the pin and hole in the changewheel for joining gears in compound trains
