Improvements in Rotary Machines for Separating or Dressing Flour, Middlings, Grain, Seed, or the like.
Year: 1893

page_text: Date of Application, 30th June, 1893-Accepted, 19th Aug., 1893
COMPLETE SPECIFICATION.
95
Improvements in Rotary Machines for Separating or Dressing Flour,
Middlings, Grain, Seed, or the like.
A communication by CARL HERMANN STEIN, 2, Dresdenerstrasse, Potschappel-
le-Dresden, in the Kingdom of Saxony, German Empire, Foreman Miller.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool and 6, Bank Street, Manchester,
both in the County of Lancaster, and 323 High Holborn, in the County of Middlesex,
Civil Engineer, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
This invention relates to a new or improved rotary-machine for separating or
dressing flour, middlings, grain, seed or the like, in which the whole circumferential
surface of the cylinder comes into effect.
Hitherto the construction of rotary machines has been built on the principle that
the flour, etcetera, had to be thrown against the sides of the cylinder and so forced
through the perforations of the covering; this could only be done by rotating the
machine very quickly, and using the arms or wings inside the cylinder as actual
beaters, the material being thrown to the inner surface of the cylinder by centri-
fugal force.
In order to make the invention better understood, reference is made to the
accompanying drawing, in which :-
Figure 1 represents a longitudinal section, and
Figure 2 a cross section of the improved machine.
Figure 3 is a cross section of the ring support for the covering, showing the
method of fastening the gauze.
A, is the wooden framing of the machine, which is made to narrow towards the
bottom by means of two boards B B placed at an inclined position. In the channel
thus formed, a conveyor worm C is set. This worm is for conveying the material
which has passed through the casing of the cylinder, out from the framing A, and
is driven by means of a driving-pulley D which is set in rotation from a shaft E.
In the upper part of the framing is mounted the cylinder F which can be rotated
from the pulley G attached to the worm-shaft C.
The cylinder F is provided with closed ends H which serve at the same time as
the bearings, these ends being connected together by four traverse-boards K which
form the ribs of the cylinder. These traverse-boards serve at the same time as
lifters for the meal and will in future be so designated.
Round these lifters, iron rings of special shape are laid and fastened firmly to
the same.
The gauze forming the covering of the cylinder is attached to these
rings and kept in position in grooves by metal wire as shown at Figure 3. E is a
shaft passing through the cylinder, its ends projecting beyond the same and carrying
the driving gear.
Within the cylinder, attached to the shaft E, are several arms
or beaters L, connected together by strips M. The upper parts of these, which
are of metal or other suitable material, are made in the form of a saw, that is, with
serrations.
These serrated strips are provided with carefully calculated perforations, so that
no pressure of the air is caused on the arms revolving.
Both the cylinder and the shaft carrying the arms L are made to rotate, with,
however, a slightly different velocity.
When the cylinder is set rotating after the material which is being separated or
dressed has been placed in, the lifters K lift the material to the top and let it fall
on the beaters, which, on their part, throw it back again equally over the whole

page_text: inner surface of the cylinder. Thus a complete and thorough shaking and separating
of the material takes place, not only on the sides and lower part of the cylinder,
but also at the top. The whole circumferential surface of the cylinder thus comes
into effect, and, consequently, the machine can be run at a considerably reduced
velocity.
A further advantage of this slower motion is that the material under treatment
is not thrown with violence against the covering, but is simply whirled against the
same, thus passing through the gauze much more easily, and causing only a very
slight wear and tear of the same.
No current of air is formed by this slower motion of the cylinder and by the use
of the above described peculiar construction of the arms, the air within the cylinder
being at rest follows the motion of the beaters without causing the usual whirlwind.
The whole process of shaking within the cylinder is thus effected much more quietly
and efficiently.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is :-
1. In a rotary machine for the purposes described, the arrangement of serrated
arms provided with perforations, attached radially to a shaft rotating within the
cylinder but at a different velocity to and independently of the same, causing the
material being separated or dressed to be spread over the whole surface of
the cylinder, substantially as described.
2. In a machine of the kind described, a cylinder consisting of separate rings of
iron such as shown in Figure 3, connected by traverse-boards, and on which rings
the gauze covering of the cylinder is kept in position in grooves by metal-wire,
substantially as and for the purpose herein described.
Dated this 29th day of June 1893.
WM. P. THOMPSON & Co.,
Agents for the Applicant.