IMPROVEMENTS IN MACHINERY FOR DRESSING CORN
Year: 1857

page_text: LETTERS PATENT to Henry Brinsmead, of Fore Street, St. Clement's,
Ipswich, for the Invention of "IMPROVEMENTS IN MACHINERY FOR DRESSING
CORN."
Sealed the 13th November 1857, and dated the 17th June 1857.
PROVISIONAL SPECIFICATION left by the said Henry Brinsmead at
the Office of the Commissioners of Patents, with his Petition, on the
17th June 1857.
I, HENRY BRINSMEAD, of Fore Street, St. Clement's, Ipswich, do hereby
5 declare the nature of the Invention for "IMPROVEMENTS IN MACHINERY FOR
DRESSING CORN," to be as follows:-
These improvements refer, firstly, to the adjustment of the parallel wires or
bars of screens for separating the various sized grains or seeds, and can be
applied to ordinary screens as well as to that known as Boby's patent screen.
This adjustment consists in altering the distance between the parallel wires or
bars by means of wires or bars of an oval section, which are arranged so as to
rotate to the extent of 90 degrees, or by a parallel cross movement of all the
ordinary round wires, or by raising and falling every other wire, or otherwise
altering the distances of parallel bars of screens, in order that such screens
may thus be adjusted from time to time to set them for different sized grain
or seed.
The second part of these improvements refers to the sieves of dressing

page_text: machines, more especially applicable when such machines are working in
connection with thrashing machines, or when they form a part of the general
arrangement of combined thrashing machines. This improvement consists in
making the single sieves of two or more different sized openings or meshes,
the largest openings being towards the "tail" end of the sieve, which allows
the "chobs" or "whites" to drop through the sieve into a spout below
(instead of going over the tail end of the sieve with the coarse refuse), from
which they are conveyed back again to the thrashing machine, and repassed
through the dressing apparatus.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Henry Brinsmead in the Great Seal Patent Office on the
17th December 1857.
TO
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
BRINSMEAD, of Fore Street, St. Clement's; Ipswich, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventeenth day of June, in the year of our Lord.
One thousand eight hundred and fifty-seven, in the twentieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Henry Brinsmead, Her special licence that I, the said Henry Brinsmead,
my executors, administrators, and assigns, or such others as I, the said
Henry Brinsmead, my executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times there-
after during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention for "IMPROVE-
MENTS IN MACHINERY FOR DRESSING CORN," upon the condition (amongst others)
that I, the said Henry Brinsmead, my executors or administrators, by an
instrument in writing under my, or their, or one of their hands and seals,
should particularly describe and ascertain the nature of the said Invention, and
in what manner the same was to be performed, and cause the same to be.
filed in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Henry Brinsmead, do hereby declare
the nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say:

page_text: These improvements refer, firstly, to the adjustment of the parallel wires
or bars of screens for separating the various sized grains or seeds, and can be
applied to ordinary screens as well as to that known as Boby's patent screen.
This adjustment consists in altering the distance between the parallel wires or
bars by means of wires or bars of an oval section, which are arranged so as to
rotate to the extent of 90 degrees, or by a parallel cross movement of all the
ordinary round wires, or by raising and falling every other wire, or otherwise
altering the distances of parallel bars of screens, in order that such screens
may thus be adjusted from time to time to set them for different sized grain
or seed.
The second part of these improvements refers to the sieves of dressing
machines, more especially. applicable when such machines are working in
connection with threshing machines, or when they form a part of the general
arrangement of combined threshing machines. This improvement consists in
making the single sieves of two or more different sized openings or meshes,
the largest openings being towards the "tail" end of the sieve, which allows
the "chobs" "whites
or
to drop through the sieve into a spout below
(instead of going over the tail end of the sieve with the coarse refuse), from
which they are conveyed back again to the threshing machine, and repass
through the dressing. apparatus.
.
"
Having, described the nature of my Invention, I will now describe the
accompanying Drawings, which represent my improvements as applied to
screens, and illustrate the best methods with which I am acquainted of
carrying out these improvements; I do not, however, confine myself thereto.
DESCRIPTION OF THE DRAWINGS, SHEETS 1 AND 2.
Figures 1, 2, 3, 4 represent various views of a screen of small area, all the
parts being full sized, and such as would do for a much larger and wider
screen.
Figure 1 is a plan, Figure 2 is a side elevation, and Figure 4 is a cross
section through a portion of the wires. a, a, are cylindrical wires firmly
fixed to the framework; b, b, are oval wires, capable of being turned round
upon their axes to the extent of 90 degrees. One end of each of these wires
is bent at right angles, and is received into a notch upon the edge of the
plate c. This plate c is capable of motion in the direction of its length, by
means of the screw formed at one end of it and a thumb nut d, working on to
the same. This nut d is retained in its place by means of plates fitting into a
groove cut into the nut, the plates being attached to the framework, or other
arrangements may be resorted to for turning the wires b, b. By turning this

page_text: thumb nut, the distances between the wires a and b of the screen will be
altered at pleasure and as required.
Figures 5 and 6 represent two views in plan (to a scale of half an inch to
the foot) of a screen connected with round wires moving in two sides of a
frame, which is free to move upon proper joints at the four corners, so as
to give a parallel movement of all their wires, and thus adjust their distances
from each other.
Figure 7 shows a full-sized section of a portion of the wires of a screen,
in which every other wire is supposed to be arranged to move to or from
the alternate fixed wires by suitable means, thus altering the distances
between the wires; but it is obvious that a screen thus made would not at
all times present so efficient a surface as either of the other methods herein
described.
Figures 8, 9, and 10 represent, in plan, side elevation, and cross section, a
screen of small area, all the parts being full sized, and such as might be used
for a much longer and wider screen. In this arrangement every other wire is
firmly attached to the main frame, and every alternate wire attached to a
separate frame, which admits of motion in a direction at right angles to the
plane of the wired surface of the screen, so that the desired adjustment
between the wires is given rising or falling every alternate wire, according
to the requirements of the case. Motion is given to the frames carrying the
moveable wires by means of the four excentric collars a, a, a, a, formed upon
their two spindles. These excentrics work in suitable holes made in the
plates forming the sides of the moveable frame. The excentric collars receive
their turning motion by means of the worm spindle 6 and worm wheels c, c,
which are attached to the spindles of the excentrics. d is a milled collar
attached to the worm spindle b, for the purpose of easily turning the same, or
the movement of the one frame to and from the other may be by any other
mechanical means.
It may occasionally be desirable to make various divisions of the different
sized grain, and this may readily be accomplished by the adoption of the
last described arrangement of screen, by simply disengaging one of the worm
wheels from the worm, and turning it a little in advance of the other worm
wheel, so as to raise the lower ends of the moveable wires a little higher than
the upper end of the same; this would give a gradually increasing space
between the wires, and thus make various divisions in the grain, according to
the sizes of the same.

page_text: Figures 1, 2, and 3, on Sheet No. 3, represent a plan, a sectional elevation,
and an end view. a is the frame carrying the sieve; b, c, is the sieve, b being
the part with fine meshes, and c the part with coarser meshes; d is a box to
catch the chobs or whites, terminating in the spout f. The corn enters at A,
and passes over the finest part of the sieve b; the clean corn drops through on
to the plate e. The chobs pass on to the coarse part of the sieve c, and drop
through the same into the box d, and pass out at the spout f. The refuse
passes over the end of the sieve and falls into a receptacle below.
Having thus described the nature of my Invention, and the manner of
performing the same, I would have it understood that I do not claim to any
of the mechanical parts separately, nor do I confine myself to the details
herein described, so long as the wires or rods of screens are made adjustable,
and so as from time to time admit of the distances apart of such wires or rods
being varied to suit different sizes of grain or seed; but what I claim is,
First, the manufacture of screens, such as herein described, with means of
adjusting the distances apart of the parallel wires or rods.
And, secondly, I claim the construction of sieves and apparatus described in
respect to Sheet No. 3 of the Drawing.
In witness whereof, I, the said Henry Brinsmead, have hereunto set my
hand and seal, this Fifteenth day of December, in the year of our
Lord One thousand eight hundred and fifty-seven.
Witness,
ARTHUR THOMAS COLE,
of Ipswich, Accountant:
HENRY BRINSMEAD. (L.S.)