and Miscellaneous Implements at Bristol. 
83 
on the drive-chain, which would otherwise cause the twister-case 
to get out of the exact position necessary to receive the wire, 
can be regulated. A cam, with a paul working in it, holds up 
the binder when it is returning to the grain. This was formerly 
arranged by lugs connected with the link, which were apt to get 
out of order. It will be remembered that the wire is supplied 
from two spools, and that each band has two twists. A pay-off 
in connection with the lower spool supplies a given quantity 
of wire, being about one-third of that which is given off from 
the upper spool. The use of two wires and two fastenings is 
claimed as an advantage, allowing of simple and more durable 
mechanism, no clamping apparatus for holding the end of the 
wire being required, and no knife, as the differentiated gear, 
acting on the two wheels of the twister at a particular portion 
of their traverse, causes the teeth to close and cut ; each tooth 
can thus act as a knife. This will be understood by reference 
to Fig. 14, p. 87. 
Fig. 7 shows the position of the binder-arm when brought up 
to the inflowing grain, previous to its descending and enclosing 
the corn. The wire from the upper and lower spool is shown 
passing over pulleys at the end of the binder-arm and com- 
pressor. 
Fig. 7. — Position of the Binder-arm of McCormicIc s Sheaf-Btnder 
before enclosing the Sheaf. 
Fig. 8 shows the position of the arms after binding the sheaf. 
The base of the binder-arm having liberated the jointed arm 
behind, the latter, actuated by the springs, drops and meets the 
compressor-arm under the sheaf. The position of the two wires 
(; 2 
