Report on Implements at Preston. 
725 
elevator and a turn-over slide, so that the tins of the creeper 
deliver the corn into sacks placed alternately on either side. 
The machine is fitted with a new transverse motion to the riddle 
case, and the screen attached to it. The front part of the riddle- 
frame is fitted with a bar, having turned pins extending on either 
side, and passing through brasses in the side of the machine. To 
Fig. 25. — Yieio of Mr. T. Corhetfs Winnoiving Machine, No. 2435. 
the centre of the bar a pivot is fixed, on which a rod with a 
universal joint is placed, the other end being connected to a pin 
in a crank-wheel working on the side of the machine. The 
back part of the riddle-frame is carried upon chains. By this 
arrangement a transverse motion is obtained, and all parts of 
the riddles are made to move at the same speed. In ordinary 
winnowing-machines the riddle-frame turns upon a centre at 
one of its ends, and, being driven by a crank at the other end, 
the motion is curvilinear, and different parts move with different 
velocities. To obtain uniformity of feed, the hopper of this 
machine is fitted with a roller, with iron projections, driven by 
a strap from the main spindle. A portable hinged board is 
