The drawing, [page 222], shows three views of a power punching press.
[Fig. 282] is a side elevation.
[Fig. 283] a front elevation.
[Fig. 281] a vertical sectional view; from these views the proportion, general arrangement and disposition of the automatic devices can be easily understood; it may be well to call particular attention to the automatic clutch on the top shaft and the tripping device.
Fig. 284.
This drawing, [fig. 284], shows a side elevation in section of a self-adjusting piston-rod packing.
A is the gland, B is the piston rod, C is a brass sleeve which contains the packing D, E is the cylinder cover, F is a coil spring. It will be seen that the spring F abuts on a bushing in the bottom of the stuffing box and is prevented from scoring the piston rod by stepping over the ends of the bushing and follower. All as shown in the drawing.
The drawing, [fig. 285], shows a sectional view of a large pulley fixed on a “quill,” or hollow shaft: the driving shaft passes through the hollow shaft and is attached to the friction clutch shown at the right-hand end; this friction clutch drives the hollow shaft and pulley.
