of String Binders at Derby. 
287 
The string is held by a gripper with spring jaws underneath 
attached to the needle-case {cl, Figs. 22 and 23). When the 
needle is in its forward po- 
sition and in the act of 
tying the knot, the needle- 
case engages against a stop 
(e) on a box fixed on the 
back of the frame (Fig. 
22), is pushed back by a 
spring at the back of such 
stop, and a steel stop on 
the bottom of the needle- 
case (y) engages the jaws 
of the gripper, forces them 
open, and at the same time 
cuts the string. The gripper 
instantly closing by means 
of a spring holds the string. 
The knotter is encased in 
a removable cover, through 
a slot in which the string 
passes, and against which 
the knot is tightened, the 
ends of the string being held 
in a spring catch (^, Figs. 
22 and 23) in the box or 
frame. 
In tying the knot the 
string passes through a 
groove below the neck of 
the auger. It first engages 
in the curve of the auger 
point in h (Fig. 23), and 
passes on to the hook be- 
hind it. The string is looped 
by the revolving of the tube, 
and as the tube retreats the 
ends of the strings are 
pushed through the loop by 
the inner needle (z, Fig. 23) 
and into the spring catch 
on a box on the back frame 
(r/). The needle-case now 
travelling back, reverses the 
motion of the knotter and the 
knot slips off, and is drawn 
tight by the slot in the cover-case. The tied sheaf is delivered 
