IMPROVEMENTS IN MACHINERY OR APPARATUS FOR DRESSING FLOUR, MIDDLINGS, WHEAT MEAL, AND GROUND OR CRUSHED GRAIN OR SEEDS.
Year: 1881

page_text: LETTERS PATENT to Thomas Frederick Hind and Robert Lund, of Preston,
in the County of Lancaster, Flour Mill Engineers, for an Invention of
"IMPROVEMENTS IN MACHINERY OR APPARATUS FOR DRESSING FLOUR,
MIDDLINGS, WHEAT MEAL, AND GROUND OR CRUSHED GRAIN OR SEEDS.".
PROVISIONAL SPECIFICATION left by the said Thomas Frederick Hind
and Robert Lund at the Office of the Commissioners of Patents on the
17th February 1881.
THOMAS FREDERICK HIND and ROBERT LUND, of Preston, in the County of
Lancaster, Flour Mill Engineers. "IMPROVEMENTS IN MACHINERY OR APPARATUS
FOR DRESSING FLOUR, MIDDLINGS, WHEAT MEAL, AND GROUND OR CRUSHED
GRAIN OR SEEDS."
This Invention of improvements in machinery or apparatus for dressing flour,
middlings, wheat meal, and ground or crushed grain or seeds, relates to apparatus
employed in the manufacture of flour known as centrifugal dressing reels, in which
the flour or other ground or crushed substance is supplied to the interior of an
outer revolving cylinder, whose periphery is covered with silk strained tightly
thereupon.
Within the cylinder a series of revolving beaters rotating at a greater speed than
the outer cylinder causes the flour or other material to be thrown or beaten against
the silk, which, acting as a sieve, separates the finer material from the coarser. The
revolving beaters usually consist of blades of wood or sheet metal running the full
length of the outer cylinder, mounted upon the extremities of arms rotating upon a
central axis. In some cases the blades are arranged parallel to the axis, whilst
in others they are arranged helically or diagonally, so that the progress of the
material through the cylinder may be assisted. In existing arrangements of
centrifugal dressing reels, it is found that the silk at that end of the cylinder at
which the material is fed or supplied has the greatest amount of work to perform,
and is consequently worn through much sooner than the silk at the tail end of the
cylinder.

page_text: According to our Invention, instead of mounting the beaters in one uniform
position or direction as heretofore, we divide them longitudinally into two or more
sections, and arrange the blades of each section in varying directions, the blades of
the first section, that is to say, the section at that end of the cylinder to which
the material is supplied, being set at a greater angle relatively to the axis than the
blades of the next section, and so on. The blades of the last section may be parallel
to the axis.
By the improved arrangement of varying or graduating the direction of the
beaters as above described, the progress of the material is accelerated at the supply
end of the cylinder and retarded at the tail end, thus distributing more equally
over the entire length of the cylinder the work to be performed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Frederick Hind and Robert Lund in the Great Seal Patent
Office on the 17th August 1881.
THOMAS FREDERICK HIND and ROBERT LUND, of Preston, in the County of
Lancaster, Flour Mill Engineers. "IMPROVEMENTS IN MACHINERY OR APPARATUS
FOR DRESSING FLOUR, MIDDLINGS, WHEAT MEAL, AND GROUND OR CRUSHED
GRAIN OR SEEDS."
This Invention of improvements in machinery or apparatus for dressing flour,
middlings, wheat meal, and ground or crushed grain or seeds, relates to apparatus
employed in the manufacture of flour known as centrifugal dressing reels, in
which the flour or other ground or crushed substance is supplied to the interior
of a revolving cylinder, whose periphery is covered with silk strained tightly
thereupon.
Within the cylinder a series of revolving beaters rotating at a greater speed than
the outer cylinder causes the flour or other material to be thrown or beaten against
the silk, which, acting as a sieve, separates the finer material from the coarser. The
revolving beaters usually consist of blades of wood or sheet metal running the full
length of the outer cylinder, mounted upon the extremities of arms radiating from
a central axis. In some cases the blades are arranged parallel to the axis, whilst in
others they are arranged helically or diagonally, so that the progress of the material
through the cylinder may be assisted.
In existing arrangements of centrifugal dressing reels it is found in practice that
the silk at that end of the cylinder at which the material is fed or supplied, has the
greatest amount of work to perform, and is consequently worn through much sooner
than the silk at the tail end of the cylinder.
According to our Invention, instead of mounting the beaters in one uniform
position or direction as heretofore, we divide them longitudinally into two or more
sections, and arrange the blades of each section in varying directions, the blades of
the first section, that is to say, the section at that end of the cylinder to which the
material is supplied, being set at a greater angle relatively to the axis than the
blades of the next section, and so on. The blades of the last section may be almost
parallel-to the axis.
In the accompanying Drawings, Fig. 1 represents a side view, and Fig. 2 an end
view of our improved arrangement of revolving beaters as above described. A, A,
are the blades or beaters at that end of the cylinder at which the material is
supplied, and B, B, the blades or beaters at the outlet or tail end. It will be seen
that the blades A, A, are set more out of line with the shaft C than the blades B, B,
the latter being set at such an angle as to cause the material being operated upon
to be moved towards the outlet or tail end of the cylinder at a slower speed than
whilst under the action of the blades A, A; D, D, are pulleys having on their
peripheries, lugs, or ears e, e, to which the blades A, A, B, B, may be secured by
screw bolts or other convenient means.
By our improved arrangement of varying or graduating the direction of the
beaters as above described, the progress of the material is accelerated at the supply
end of the cylinder, and retarded at the tail end, thus distributing more equally
over the entire length of the cylinder the work to be performed.
It will be evident that more than two sections of blades or beaters, as shewn in
the Drawings and hereinabove described, may be employed, and that the blades or
beaters of any convenient number of sections may be arranged to follow each other
at gradually decreasing angles relatively to the central shaft or axis, so as to cause
the material being dressed to be moved forward at a gradually decreasing speed
from the supply end to the outlet or tail end of the dressing cylinder.

page_text: Having now described our said Invention, and the manner in which it may be
performed or carried into practical effect, we would have it understood that we lay
no claim to any of the mechanical parts herein before described or referred to, but
what we consider to be novel and original, and therefore claim as the Invention
secured to us by the hereinbefore in part recited Letters Patent is as follows (that
is to say)-Arranging the blades upon revolving beaters of centrifugal dressing
reels at a greater angle at the supply end than at the outlet or tail end, sub-
stantially as above described and shewn in the Drawings, for the purpose
specified.
In witness. whereof, I, the said Thomas Frederick Hind, have hereunto set my
hand and seal, this Sixteenth day of August, in the year of our Lord One
thousand eight hundred and eighty one.
THOMAS FREDERICK HIND. (L.S.).