IMPROVEMENTS IN SCREENS AND APPARATUS FOR SCREENING BARLEY AND OTHER GRAIN AND SEED
Year: 1877

page_text: LETTERS PATENT to Thomas Frederick Stidolph, of Woodbridge, in the County
of Suffolk, George Henry Aggio, of Colchester, in the County of Essex, and
George Frederick Stidolph, of Woodbridge, in the County of Suffolk, for the
Invention of "IMPROVEMENTS IN SCREENS AND APPARATUS FOR SCREENING
BARLEY AND OTHER GRAIN AND SEED."
Sealed the 26th May 1877, and dated the 24th February 1877.
PROVISIONAL SPECIFICATION left by the said Thomas Frederick Stidolph,
George Henry Aggio, and George Frederick Stidolph at the Office of the
Commissioners of Patents on the 24th February 1877.
THOMAS FREDERICK STIDOLPH, of Woodbridge, in the County of Suffolk, GEORGE
HENRY AGGIO, of Colchester, in the County of Essex, and GEORGE FREDERICK
STIDOLPH, of Woodbridge, in the County of Suffolk. "IMPROVEMENTS IN SCREENS
AND APPARATUS FOR SCREENING BARLEY AND OTHER GRAIN AND SEED."
Heretofore when flat screens with longitudinal wires have been used for screening
barley and other grain and seed, there have ordinarily been cross ties upon the
screening surface to retain the longitudinal wires to their proper distance apart
from one another. These cross ties obstruct the passage of the grain down the
screen, and frequently large portions of the screen from this cause become choked
by grain resting on their surface. To obviate this we divide the inclined surface
of the screen into a number of cross shelves or steps, which come one slightly below
the other. Each of the wires at the lower end of each step or shelf is bent down-
wards nearly at right angles, and is then again bent forwards to form the next
step or shelf; and where the wires are thus bent downwards between the succeeding
steps we place cross ties to keep the wires at the required distance apart from one
another. The ties are consequently entirely clear of the screening surface over
which the grain passes, so allowing a free passage for the grain and avoiding the
choking of the screen.

page_text: We also in some cases make the several steps or shelves of the screening surface
separate from one another and with a narrow space between them, so that the
lighter seed or grain may drop through such spaces and be so separated from the
heavier and good seed or grain. In this case the series of longitudinal wires
forming each shelf are, as in the former case, bent downwards at right angles, or
nearly so, and their extremities are inserted into a bar forming part of the frame of
each shelf. Each of the several shelves is thus formed of a series of parallel wires,
and the wires are so carried that there is no obstruction upon the sieve surface to
the free flow of grain down the screen.
In some cases, in forming screens such as herein-before described, we mount the
alternate wires of which the screen is formed so that they can be raised or lowered,
and thus vary the guage of the screen as required. We prefer that the wires should
be square in section, and that one angle should be upwards; but the wires may bo
of a circular, or oval, or other section.
In order that the screening apparatus may not only be adapted for screening
barley and such like grain, but also for screening or dressing smaller seeds, we so
form the apparatus that a series of shelves made of wood or other suitable material,
may be placed over or substituted for the wire screen, and so that the same hopper
may be used for supplying a stream or streams of seed on to the upper end of such
series of shelves. These shelves may also be covered with cloth or other material
to retard the descent of the seed, so that the lighter seed may fall between the
shelves whilst the heavier seed or matters pass from shelf to shelf.until they arrive
at the bottom.
.
•
The shelves are all fixed in one frame; the upper end of this frame rests upon
ping carried by the main framing of the machine, whilst the lower end of the frame
can be raised or lowered according as it is desired that the seed should pass more
or less quickly over the series of 'shelves:
In order also that the action of the dressing apparatus shall not be interfered
with by wind or currents of air we place a cover over the top of the shelves or
screens at such a distance from them as to allow free passage for the descent of the
grain or seed.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Frederick Stidolph, George Henry Aggio, and George
Frederick Stidolph in the Great Seal Patent. Office on the 24th August
1877.
THOMAS FREDERICK STIDOLPH, of Woodbridge, in the County of Suffolk, GEORGE
HENRY AGGIO, of Colchester, in the County of Essex, and GEORGE FREDERICK
STIDOLPH, of Woodbridge, in the County of Suffolk. "IMPROVEMENTS IN SCREENS
AND APPARATUS FOR SCREENING BARLEY AND OTHER GRAIN AND SEED."
Heretofore when flat screens with longitudinal wires have been used for screening
barley and other grain and seed there have ordinarily been cross ties upon the
sereening surface to retain the longitudinal wires to their proper distance apart
from one another. These cross ties obstruct the passage of the grain down the
screen, and frequently large portions of the screen from this cause become choked
by grain resting on their surface. To obviate this we divide the inclined surface
of the screen into a number of cross shelves or steps, which come one slightly below
the other. Each of the wires at the lower end of each step or shelf is bent down-
wards nearly at right angles, and is then again bent forwards to form the next step
r.shelf; and where the wires are thus bent downwards between the succeeding
steps we place cross ties to keep the wires at the required distance apart from one
another. The ties are consequently entirely clear of the screening surface over

page_text: which the grain passés, so allowing a free passage for the grain and avoiding the
choking of the screen.
Figure 1 shews a longitudinal section of a screen constructed as above described.
A, A, are the side bars of the screen frame; B, B, are cross bars, to which the
top and bottom ends of the longitudinal wires C are secured. The wires C are, as
shown, bent, to form them into a series of steps. D, D, are the cross ties between
the succeeding steps, to which ties the wires Care secured to keep the wires at the
required distance apart and to strengthen the screen.
We also in some cases make the several steps or shelves of the screening surface
separate from one another and with a narrow space between them, so that the
lighter seed or grain, or foreign substances, may drop through such spaces and be
so separated from the heavier and good seed or grain. In this case the series of
longitudinal wires forming each shelf are, as in the former case, bent downwards at
right angles, or nearly so, and their extremities are inserted into a bar forming
part of the frame of each shelf. Each of the several shelves is thus formed of a
series of parallel wires, and the wires are so carried that there is no obstruction
upon the sieve surface to the free flow of grain down the screen.
Figure 2 shows a longitudinal section, and Figure 3 a front view, of a screen
constructed in this manner.
A, A, are the side bars of the frame of the screen; C, C, are the wires; and B, B,
the cross bars to which they are attached.
In some cases, in forming screens such as herein-before described, we mount the
alternate wires of which the screen is formed so that they can be raised or lowered,
and thus vary the gauge of the screen as required. We prefer that the wires should
be square in section, and that one angle should be upwards; but the wires may be
of a circular, or oval, or other section.
In order that the screening apparatus may not only be adapted for screening
barley and such like grain, but also for screening or dressing smaller seeds, we so
form the apparatus that a series of shelves made of wood or other suitable material,
may be placed over or substituted for the wire screen, and so that the same hopper
may be used for supplying a stream or streams of seed on to the upper end of such
series of shelves. These shelves may also be covered with cloth or other material
to retard the descent of the seed, so that the lighter seed may fall between the
shelves whilst the heavier seed or matters pass from shelf to shelf until they arrive
at the bottom.
The shelves are all attached to one frame; the upper end of this frame rests upon
pins carried by the main framing of the machine, whilst the lower end of the frame
can be raised or lowered according as it is desired that the seed should pass more or
less quickly over the series of shelves. The shelves can be each raised or lowered
in inclination at pleasure. The screen shown at Figures 2 and 3 is arranged in
this manner; the screen shewn in these Figures is hung on pins E, which can
readily be withdrawn to allow the screen to be removed and another one put in
its place. The front of the screen has chains attached to it, by which it can be
held up at any desired height; the chains hook on to hooks on the front posts of
the fixed frame F. At the upper end of this frame is carried the hopper G, from
which the seed or grain to be screened is allowed to flow on to the screen.
In the
hopper shewn the width of the outlet from the hopper can be enlarged or decreased
by raising or lowering the board G', which is carried by links G2, as shewn, one of
which has a lever handle formed with it; by moving this handle the width of the
outlet from the hopper is controlled.
In order also that the action of the dressing apparatus shall not be interfered
with by wind or currents of air, we place a cover over the top of the shelves or
screens at such a distance from them as to allow free passage for the descent of the
grain or seed.
Having thus described the nature of our Invention, and the manner of performing
the same, we would have it understood that we claim the several improvements

page_text: herein-before set forth in screens and apparatus for screening barley and other grain
and seed.
In witness whereof, I, the said George Henry Aggio, have hereunto set my
hand and seal, this Twenty-third day of August, in the year of our Lord
One thousand eight hundred and seventy-seven.
GEORGE HENRY AGGIO. (L.S.)