the Philadelphia Centennial Exhibition. 
19 
drives from cither side the crank-shaft C, and the elevator driving-shaft D. 
The two pinions balance each other, and as the binding machinery is driven 
from D, it will be seen that the arrangements for producing complicated effects 
are remarkably simple. The rollers which drive the apron and elevator by 
which the corn is carried from the knife to the tying-apparatus are both driven 
from the end of the shaft D by chain-gearing. This, again, is well con- 
trived. The apron with wooden slats is shown at I, and the elevator-belts at 
J J 1 J 2 J 3 J 4 J 6 ; and this completes the whole of the machinery belonging to 
the harvester proper. The tying-apparatus can be readily detached, and the 
machine worked by manual binders ; all that is required is to shift the driver's 
seat from S to a. Before I proceed to details, it may facilitate my explana- 
tion if I briefly state the plan of working. The corn is delivered in a con- 
tinuous stream on to the concave table Q. The revolving binder-arm, with 
the compressing and reciprocating arm, collect the com into a sheaf, bind it 
round with wire, twist the same, and cut it off ; all this taking place during 
part of the revolution of the binder-arm. The sheaf is made and thrown off 
the platform by means of a couple of springs, not shown in the illustration. 
The ingenious mechanism by which the two wires are twisted and cut off is 
more easily understood than described. It is effected by the action of two 
small toothed wheels working in opposite directions. The cutting off is 
effected when these wheels cease to move forward, the wire coming in contact 
with a sharp edge. 
Fig. 12. — Front Elevation of Walter A. Wood's Harvester and 
Self-binder combined. 
A. Driving-wheel with spur-gear. 
B. Cross-shaft. 
C. Crank-shaft. 
E. Large elevator roller. 
G. Reel, driven by chain. 
J. Elevator-belts. 
K. Oblique shaft. 
M. Binder-arm. 
N . Compressing arm. 
0. Recriprocating arm. 
P. Standard. 
Q. Receptacle for the grain. 
Y. Outside divider. 
Z. Ground-wheel. 
Fig. 12 enables me to proceed with my description. The motion for 
securing the action is derived from the shaft D by bevel gearings driving the 
shaft K, which again communicates motion to the binder-shaft L. By a crank- 
gear the binder-arm M is made to revolve. The compressing arm N is 
so contrived as to ensure the proper amount of pressure on the band. E is 
the stand for the' wire-spool, a variable tension being provided for. The 
c 2 
