Improvements in Flour Separators.
Year: 1890

page_text: Date of Application, 15th Sept., 1890-Accepted, 18th Oct,, 1890
COMPLETE SPECIFICATION.
Improvements in Flour Separators.
I, PETER SADRAVEZT, residing at 4 Guenther Street in the City of San Antonio,
State of Texas, United States of America, Inventor, 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 rotary bolts or flour-separators; and it has for its object to
construct a machine of this class by means of which by a single operation the flour
may be separated from the middlings and the fine from the coarser grade of middlings,
thus performing at a single operation that which heretofore has required two separate
operations to accomplish.
With this object in view, my invention consists in the arrangement within a suitable
casing of two bolting-cylinders, one within the other, the details of construction and
arrangement of parts being as will be hereinafter fully described and particularly
pointed out in the claims.
In the drawings:-
--
Fig. 1 is a longitudinal sectional view of a machine embodying my improvements.
Fig. 2 is a transverse sectional view of the same taken on the line 2-2 in Fig. 1.
Fig. 3 is a transverse sectional view taken on the liue 3-3 in Fig. 1.
Like numerals of reference indicate like parts in all the figures.
1 designates the frame or casing of the machine which is provided with bearings
for the shaft 2 which is provided with radial arms 3 which are connected by means of
longitudinal frame-bars 4 to which the covering 5 which is preferably constructed of
wire-cloth of suitable mesh is secured. At one end of the inner cylinder thus formed
is secured the head 6 which is provided with a central opening 7 through which
extends the feed spout 8 within which is located a spiral feed-flange 9 which is secured
upon the shaft 2.
10 designates the head of the outer cylinder. Said head is mounted to revolve upon
the hub of the disk or head 6. The said head is provided with a flange 11 having
recesses in which are secured the longitudinal frame-bars 12. The opposite ends of
said frame-bars are mounted in or attached to a disk 13 which is mounted upon the
shaft 2 at the opposite end of the casing.
Secured upon the shaft 2 of the discharge end of the inner cylinder is a wheel or
spider 14 which is peripherally toothed as will be seen in Fig. 3. The disk 13 at the
tail end of the outer cylinder is provided with an internally toothed flange 15.
16 designates a short shaft journalled in suitable bearings and carrying a pinion 17
that meshes with the toothed wheel or disk 14 and with the internally toothed
flange 15. It will be seen that by this construction when the shaft carrying the inner
cylinder is rotated, rotary motion in an opposite direction will be transmitted to the
outer cylinder. The discharge end of the inner cylinder is extended beyond the
discharge end of the outer cylinder and is provided with an exterior annular flange 18
engaging an interior annular flange 19 secured to the outer cylinder frame thus
forming a cut-off to prevent the material discharged from the inner and outer
cylinders from being mixed.
20 and 21 designate the discharge openings that receive the discharge from the
inner and outer cylinders respectively. The material that sifts through the outer
cylinder passes into the bottom of the casing which is hopper-shaped and in which the
spiral conveyer may be arranged to conduct it to some suitable receptacle.
Suitably arranged longitudinally in one of the upper corners of the casing is a
brush 22 which bears against the cover of the outer cylinder which may be of ordinary
silk bolting cloth. Suitably attached to one of the longitudinal frame-bars of the
outer cylinder is a similar brush 23 which bears against the outside of the inner
Prine d I

page_text: cylinder. These brushes in practice serve to prevent the material with which the
cylinders are covered from being clogged.
From the foregoing description taken in connection with the drawings hereto
annexed, the operation and advantages of my invention will be readily understood by
those skilled in the art to which it appertains.
The material which is to be separated is fed through the spout 8, the spiral conveyer
flange 9 serving to deliver it into the inner cylinder. In passing through the latter
the finer are separated from the coarser particles which latter continue their course to
the discharge opening 20, while the former are discharged into the outer cylinder.
By the rotation of the latter an additional separation will be performed, the finer
particles resulting from which are discharged into the bottom of the casing while the
coarser particles are discharged through the opening 21 at the tail end of the
machine.
As will be seen from the foregoing description, the construction of my improved
bolt or separator is exceedingly simple and it will be seen that it is capable of
performing at a single operation that which has heretofore required two separate
machines or two separate operations. The principle of construction of my improved
bolting reel may with equal efficiency be applied to scalping-machines.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. The combination of the casing, the cylindrical screens arranged in said casing
one within the other, a brush arranged in the casing and bearing against the outer
cylinder, a brush arranged interiorly in the outer cylinder and bearing against the
inner cylinder and mechanism for rotating the said cylindrical screens simultaneously
in opposite directions, substantially as set forth.
2. The combination of the casing, the longitudinal shaft, a cylindrical screen
mounted upon said shaft, an outer cylindrical screen mounted to rotate around the
inner screen, a spur-wheel meshing with an interiorly-toothed wheel or spider attached
to the outer screen and with a spur-wheel mounted upon the shaft of the inner screen,
a brush arranged in the casing and bearing against the outer cylindrical screen and a
brush arranged interiorly in the outer screen and bearing against the inner cylindrical
screen, substantially as set forth.
3. The combination of the casing, the feed-spout, the longitudinal shaft extending
through said spout and having a spiral-conveyer flange, the cylindrical screens
arranged one within the other, suitable outlets arranged under the discharge ends
of the respective cylinders, the brushes arranged in the casing and in the outer
cylinder and bearing against the outer and inner cylinders respectively and means for
rotating said cylinders simultaneously in opposite directions, substantially as and for
the purpose set forth.
Dated this 15th day of Santember 1800
W. P. THOMPSON & BOULT,
Agents for the Applicant.