A MACHINE POR THE PURPOSE OF WINNOWING OR DRESSING CORN OR GRAIN, FOR THE USE OF BREAD, CATTLE, OR SEED
Year: 1800

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
COOCH, of Harleston, in the County of Northampton, Farmer, send greeting.
WHEREAS His most Excellent Majesty King George the Third did, by
His Letters Patent under the Great Seal of Great Britain, bearing date, at
Westminster, the Seventeenth day of June, in the fortieth year of His reign,
give and grant unto me, the said John Cooch, His especial licence that I, the
said John Cooch, during the term of years therein mentioned, should and law.
fully might use, exercise, and vend, within England, Wales, and the Town of
Berwick-upon-Tweed, my. Invention of "A MACHINE POR THE PURPOSE OF
WINNOWING OR DRESSING CORN OR GRAIN, FOR THE USE OF BREAD, CATTLE, OR
SEED;" in which said Letters Patent there is contained a proviso obliging me,
the said John Cooch, by an instrument in writing under my hand and seal, to
cause a particular description of the nature of my said Invention, and in what
manner the same is to be performed, to be inrolled in His Majesty's High
Court of Chancery within one calendar month after the date of the said recited
Letters Patent, as in and by the same (relation being thereunto bad) may
more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
John Cooch, do hereby describe and ascertain the nature of my said Invention,
and in what manner the same is to be performed, as well by the Figures or
Delineations of the machinery hereunto annexed, as by the description or
explanation herein-after set forth (that is to say) :-
The whole length of the machine is about six feet, the breadth about two
feet, and the height about five feet ten inches.

page_text: The Drawing No. 1 represents a section of the machine. A, A, A, the fan,
consisting of six leaves, made of thin board, iron, or tin, fixed on the axle a
B, B, a circular hole, about sixteen inches diameter, through which the air is
admitted into the cavity C, C, which, expanding from D to D, is again con-
tracted to E, and is discharged at the passage F. G, the hopper. H, a tem-
porary board, to be added occasionally to either side. I and K are two
cylinders, situate immediately under the hopper I, the largest about six inches
diameter; in which are a number of small iron pins, for the purpose of feeding
the machine regularly, except on one side, which is plated with iron, about
three inches wide. K, the smallest, about. four inches and an half diameter,
is covered with sheet iron to prevent its wearing out. L, a sliding divider,
which separates the grain at discretion. M, a frame, in which is fixed the
riddle, made of sheet iron pierced, or of wire, the shaft of which is supported
at the upper end by a hook-m. N, an iron spout, placed on the end of the
riddle frame, to conduct what passes over the riddle into the spout O, and
from thence out of the machine. P; P, an inclined plane, down which the
good grain likewise passes out of the machine. Q, a screen, on which the
light corn and seeds fall, and through which many of the small seeds, &c. pass
into the box R, and may be let out by sliding up the board S.
-handles. U, U, are two sliding handles, which, when drawn
carry the machine by.
T, T, are two
out, serve. to
The Drawing No. 2 represents a view of the machine on the handle or
working side. A, the winch or handle, in which is a joint at B, whereby it
may be turned to lie parallel with the side of the machine, for the convenience
of carrying through doorways, &c. C, the principal wheel, containing sixty
teeth, which drives a pinion of twelve teeth. Fixed on the axle of the fan, on
the side of the same wheel at D, is another set of twenty-four teeth, driving a
pinion of twelve teeth, fixed on the long axle E; on the other end of which
are two pinions, which turn the wheels F and G, fixed on the axles of the
cylinders. The pinion H, of eight teeth, drives the wheel F, of thirty-two
teeth. The pinion I is a long one, of twelve teeth, working in the wheel G,
of twenty-four teeth; the axle of which is supported by a frame of cast iron,
playing on a center on each side of the machine, as at K, by which means the
small cylinder is rendered moveable, and is kept at a proper distance from the
other by a regulating screw (as in section No. 1, Figure 1). There are like-
wise two cast-iron weights (in section No. 1, Figure 2), hanging on centers on
the insides of the machine, and bearing against the frame which carries the
smallest cylinder to keep it to its work. L, a screw to the sliding divider, by
which it may be fixed, as required," by the scale of figures on the side of the

page_text: M, a small chain, supporting the riddle
N, the spout, through which what passes
machine, near the said letter L.
frame on each side of the machine.
over the riddle is conveyed out of the machine; and O, a small moveable
board, to stand erect or inclined, to separate the chaft' from the tail..
The Drawing No. 3 represents a view of the machine on the other side,
where A is a crank on the axle of the fan, which, by means of the wooden
rod B, with an iron hook at the bottom, works the crank C, playing
on a hook
on the side of the machine, from whence a small iron rod extends to the
opposite side of the riddle, to which, being fastened by a hook at C, C, as in
No. 2, it communicates a shaking motion. D, D, two iron hooks, fixed to a
small piece of wood suspended at E, one of which is hooked to the upper end
of the rod B, and the other to the crank F, which gives motion to the forked
iron instrument, described Figure 1, crossing the hopper to a crank F, F, in side
view No. 2; and Figure 2 represents the riddle frame with the riddle and spout.
The machine is worked in the following manner:-By turning the
winch, the air is collected by the motion of the fan, and impelled into the
passage, through which it is driven with accelerated velocity, and obtains a
strong and regular current. The corn in the chaff being put into the hopper
is prevented from lodging there by the motion of the forked iron instrument
placed therein, and falls down upon the cylinders; both of which turning
inwards, convey it in a thin stream to the current of air, upon the principle of
what is commonly called back heaving, which blows the chaff out at the end
of the machine; and the good corn is separated from the bad by the sliding
divider. In dressing it over the second time, the large cylinder must be stopt
by slipping it back to miss the tooth of the pinion; and a catch, which is on
the back of the wheel, will set it in such a position that the iron plate thereon
will be opposite the other cylinder; but when at work is kept in its proper
place by an iron keeper dropping on the axle behind the wheel. The iron
forked instrument in the hopper should likewise be stopt the second time over
by lifting out the hook D from the upper end of the rod B (in Drawing No. 3).
The cylinders may be placed nearer or farther off each other by the regulating
Screw to admit the corn faster or slower, as occasion may require. If used for
Iressing clover, seeds, &c., a temporary hopper must be placed within the
other with an orifice regulated by a screw. Fine wire riddles adapted to this,
purpose must likewise be substituted.
In witness whereof, I, the said John Cooch, have hereunto set my hand
and seal, this Tenth day of July, in the year of our Lord One
thousand eight hundred.
JOHN COOCH. (L.B.)

page_text: AND BE IT REMEMBERED, that on the same Tenth day of July,
in the year above mentioned, the aforesaid John Cooch came before our
Lord the King in His Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained, in form above written.
And also the Specification aforesaid was stamped according to the tenor of
the Statute in that case inade and provided.