The Trials of Self -binding Harvesters at Chester. 715 
platform and carries the finger-bar, grain wheel, and divider. 
On the same foundation is erected a braced framework, to which 
the driver’s seat, the reel, the conveyors, and the binding 
machinery are attached. 
The main driving-wheel, 3 ft. diameter by 9 in. wide, 
runs inside the D frame, turning on a fixed axle on the ends of 
which are secured pinions which gear into curved racks formed 
in the segmental brackets attached to the main frame, in which 
the axle rises or falls when turned by a worm wheel keyed on 
the axle and actuated by a worm working in a bracket which 
slides in the upper part of the segmental slot in which the 
main axle plays, and is guided there by an antifriction roller. 
The spindle of the worm is connected by a universal joint to 
a light shaft which passes to the rear of the machine, and ter- 
minates in a square on to which a handle fits. 
The motion of the driving-wheel is communicated by a 
pitched chain to a second motion countershaft which crosses 
the gearing frame in rear of the main wheel, and is set parallel 
to, and about level with, the driving-wheel axle, and, at its near 
end, transmits its motion by means of bevel gearing to a third 
motion shaft or crank spindle, the forward end of which carries 
a crank plate which actuates the cutting apparatus by means of 
a pitman which traverses the forward end of the gearing frame. 
The rear end of this third motion shaft carries a sprocket 
pinion which engages into a pitched chain which drives, in suc- 
cession, the roller of the platform apron, then, rising upwards, 
the elevator roller, then turning downwards, the square shaft 
which actuates the binding machinery by means of either of two 
sprocket wheels of different diameters, which thus allow of a 
change of speed of binding in relation to that of the forward 
motion of the machine. A jockey pulley attached to the main 
frame is arranged to take up the slack of the chain. 
The draft-pole is pivoted to eyes solidly attached to the 
forward face of the main frame, and is held at the proper slope 
by a diagonal stay secured to the upper gearing frame. The 
travelling-wheels are mounted on short axles which slip into 
sockets secured to the main frame, and are so placed that the 
machine is in perfect balance on them when the pole is trans- 
ferred to its travelling position. This arrangement enables the 
dismounting of the machine for the road and subsequent pre- 
paration for work to be done by one man. 
A bevel wheel on the forward end of the conveyor roll- 
spindle drives a short crank-shaft placed at right angles to the 
binder platform ; the crank on the upper end of this is con- 
nected by a short bracket to the buttox*, to which it thus com- 
