Model of one Tilt Hammer and one lifting Hammer at right angles to each other, one hammer actuated at the tail, the other at the belly by lifting cams driven by one connecting rod fitted with stepped sun and planet motion

The model shows an arrangement of a lifting hammer and a tilt hammer driven from the same shaft. There are some resemblances between this model and the plant put down by Boulton and Watt for John Wilkinson at Bradley Forge, Staffordshire, in 1783.

A beam engine drives a heavy flywheel on a horizontal shaft with two cam rings. The one with three cams drives a lifting hammer with axis parallel to the shaft and the one with four cams drives a tilt hammer at right angles to the shaft. On the former there is provision above the helve for a spring beam to obtain a heavier blow than would be obtained by gravity alone.