AN IMPROVED CORN SCREEN
Year: 1885

page_text: I MICHEAL JENKINSON 4 Augers Terrace Grantham Lincolnshire Agricultural
Engineer do hereby declare the nature of my invention for AN IMPROVED CORN
SCREEN and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
This invention has for its object to provide a simple and effective machine for
separating small seeds, grit, and other objectionable particles from corn.
My invention consists of a suitable frame-preferably made of wood-in which
a longitudinal screen, provided with a number of separating divisions and steps, is
made to oscillate by means hereinafter described; a hopper for feeding the said
screen is also fixed conveniently to this frame.
In carrying my invention into effect, I suspend the screen in an inclined position
in the frame by chains or other suitable means fixed at convenient parts of the
said frame, the said. screen is made to oscillate in a direction at right angles to its
length by links connected to pins, fixed eccentrically in discs; which discs are
keyed to a shaft that revolves in bearings fastened to the frame, the said shaft is
fixed lengthwise the screen, and is driven by a handle or by pulleys; the links
hereinbefore mentioned connect from the driving shaft to a spindle or to pins fixed
underneath the screen.
The screen is provided with divisions, or steps, each division is provided with
a riddle or perforated sheet of metal of a suitable mesh, the said riddles or per-
forated sheets of metal are each fixed in an inclined position in order to permit the
corn to travel from one division to another, thence to the receptacle placed at the
lower end of the said screen, for receiving the same.
The screen is fed from the hopper, the bottom or floor of such hopper is inclined
from the back, downwards to the mouth, so as to permit the corn to fall easily out
of the hopper, and on to the first or top division of the screen, the feeding side of
the said hopper is provided with a movable slide in order to regulate the quantity
of corn passing out, and on to the said screen.
In order that my invention may be fully understood and readily carried into
effect, I will now proceed to describe the Drawing hereunto annexed; the same
letters of reference indicating corresponding parts in both the figures,

page_text: DESCRIPTION OF THE DRAWINGS.
Fig 1 is a side elevation and Fig 2 is an end view.
A A is part of frame; secured to the top rails of which are the chains or suspen
sion rods B B. their lower ends are secured to the screen C. D is a shaft supported
in brackets E E, which brackets are fixed to the frame A A. FF are crank disca
keyed to the said shaft D. The Crank discs F F are provided with pins G¹ G
which pins receive one end of the links H H the other ends of the said links are
connected to the spindle I which is fixed underneath the screen C. J is a handle
fixed on pin G₁ for actuating the screen. KKKK shown in dotted lines are
divisions or steps, each provided with a riddle or perforated sheet of inetal. Lis
the hopper for feeding the screen C, the dotted lines M. show the floor of such
hopper inclined from the back downwards to the mouth N. O is a slide for
regulating the supply of corn to the screen C.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
First. A longitudinal screen suspended in an inclined position by chains or other
suitable means provided with divisional steps substantially as herein described and
illustrated by the annexed Drawings.
Second. The arrangement for oscillating the said screen in the direction of its
width, consisting of a shaft provided with crank discs and of links connecting the
crank pins provided in said crank discs to the spindle or pins fixed underneath
the aforesaid screen all substantially as herein described and represented by the
annexed Drawings.