of String Binders at Derby. 273 
Fig. Elevation of W. A. Wood's String Binder. 
for driving the knotter. Fig. 7 shows in transverse elevation 
the apparatus for transmitting the motion governing the action 
of the knotting mechanism. 
The knotter consists of a vertical spindle with a small pinion 
on the top, worked by a bell-crank segment, which causes it to 
make part of a revolution and then reverse. 
On the lower end of the spindle are two hooks, the upper one 
provided with a barb. The lower one is double, having two 
fingers, the leading one of which follows somewhat behind the 
upper finger. In working, the double hook, string is passed over 
VOL. XVIII. — S. S. T 
