of String Binders at Derby. 
269 
has six smooth-edged recesses, into any one of which the string 
is guided. One edge of this disc works closely between cheeks, 
between which and itself, by its revolution, it carries and jambs 
the string, and so holds the free end. The rotary motion is 
communicated by the plunger bolt, lever and paul and ratchet, 
with a spring catch on the opposite side to prevent it from 
turning backwards, and so liberating the string. 
(2.) The string, which is fed from a tin canister on the top 
of the machine, through a tension regulating and taking up slack 
apparatus, passes through guide-eyes and tubes to the side of 
the needle-arm and along the needle for about one-third of its 
length, without roller or springs. 
(3.) The knotter is of the bird-beak type, and made under 
Appleby's patent. The lower half of the beak or jaw has 
simply- a revolving motion. The upper beak can be opened 
by a cam surface, and closed by a spring cam actuating a small 
roller on the back end of the beak. 
The motion for Fig. 2. 
making a knot con- 
sists of one complete 
revolution in one 
direction only, and is 
obtained by a short 
toothed segment on 
the cam - wheel on 
shaft No. 5. Both 
strands of the string 
pass over both beaks, 
as seen in Fig. 1, 
and are prevented 
from getting out of 
place by a tucker, 
consisting of a lever 
actuated by a cam 
or cam -wheel, and 
which follows the 
string as soon as the 
needle has passed 
over the beaks ; and 
without actual con- 
tact, it effectually pre- 
vents the string get- 
ting out of place. At 
the proper moment for making the knot, the beaks revolve, 
forming the loop, as shown in Fig. 2. Then the upper beak 
