7 1 G The Trials of Self-binding Harvesters at Chester. 
municates a compound motion resulting from a sliding motion 
of the lower end upon a supporting arm and the elliptical motion 
communicated by the crank. 
A bevel pinion on the forward end of the inner elevator roll- 
spindle actuates a short shaft which runs across the machine 
about 3 ft. 6 in. from the ground and works the reel through a 
pair of jointed frames which rock in the direction of the motion 
of the harvester, and the lower one of which is pivoted to 
brackets secured to the forward end of the driver’s footboard. 
The frames are controlled by the driver by means of a pair of 
levers, one of which actuates the lower member of the frame and 
serves to raise or lower the reel, and the other operates the 
upper member and moves the reel to or from the crop. Revo- 
lution is transmitted to the reel by means of pitched chains 
actuating sprocket-wheels keyed upon spindles situated in the 
line of the jointing of the frames, and therefore not affected 
by their motion. 
The construction of the main driving-wheel is somewhat 
special. The rim is of thin steel rolled with two internal ribs 
spaced about one-third of its width apart. The nave is formed 
of a pipe box, which, on the off end, has a fixed flange to which 
the arms of the sprocket driving-wheel are attached, while on 
the near end is a loose flange sliding on the pipe box, and which 
can be drawn towards the fixed flange by means of four bolts. 
The spokes of the wheel are composed of plain pieces of 
-§ round steel, which drop loosely into sockets in the flanges and 
in the ribs formed inside the rim, but so that the alternate 
spokes cross each other ; that is, the spokes whose inner ends 
abut on the near flange have their outer ends in the rib nearest 
the far side, and vice versa. The effect of this arrangement is, 
that the drawing together of the nave flanges by means of the 
four bolts mentioned produces a toggle action of the spokes and 
sets them firmly into their places without further fastening. The 
sprocket driving-wheel is further connected directly to the inside 
of the rim of the main wheel by two tangent stays, which thus 
relieve the spokes of all transverse stress. 
The off side of the platform is carried by the grain-wheel iu 
the usual way, the height being regulated by a conveniently 
placed handle actuating a worm gearing into a rack. The grain 
dividers are secured to the steel framing in a very substantial 
manner. 
The binding machinery is arranged in a traversing platform 
controlled by a lever at the driver’s hand, so as to permit the 
string being placed accurately I’ound the middle of the sheaf. 
The two packers which gather up the corn and press it against 
