Fig. 1545.
Fig. 1546.
The outer sleeve m carries the rod t, [Figs. 1544] and [1545], which is connected to the lever u, the upper arm of which is operated by the tappets or dogs x on the ram or sliding bar, and it is obvious that when u is vibrated sleeve m is operated in a corresponding direction, and the ring l also is moved endwise in a corresponding direction, actuating the band as before described, the direction of motion being governed, therefore, by the direction in which u is moved by the tappets or dogs. A certain degree of friction is opposed to the motion of lever u in order to keep it steady, the construction being shown in [Fig. 1546], where it is seen that there is on each side of its nut a leather washer, giving a certain amount of elasticity to the pressure of the nut holding it in place on the shaft u.
Fig. 1547.