Improvements in or connected with Purifiers for Middlings and other like Products.
Year: 1892

page_text: Date of Application, 14th June, 1892
Complete Specification Left, 15th Oct., 1892-Accepted, 19th Nov., 1892
PROVISIONAL SPECIFICATION.
Improvements in or connected with Purifiers for Middlings and
other like Products.
We, JOSEPH BARRON, of Whitehall Road, Leeds, Corn Mill Engineer, and
SAMUEL GREEN, of Back Bank Street, Castleford, Corn Miller, both in the
County of York, do hereby declare the nature of this invention to be as follows:-
The object of our invention is to provide apparatus for separating substances of
different specific gravities, and which, apparatus is particularly applicable for
purifying middlings, semolina, and "dunst."
According to our invention and when applied to middlings purifiers, we employ
the ordinary vibrating sieve having an air chamber above same, from which air is
exhausted. Over the sieve and between the latter and the exhaust, we provide a
series of parallel vanes or laths, so arranged that they form a series of steps
descending from the centre to the two sides.
By arranging the vanes or laths in a step-like manner as above described, a space
is provided between each of such vanes or laths, the width of which may be varied
to suit the requirements of the material to be operated upon; such variation in
width may be adjusted by screws or by any other convenient means, and the vanes
or laths may overlap each other to any required extent.
On the application of the exhaust, air is drawn upwards through the vibrating
sieve, taking with it the fluff or light particles which are drawn through the spaces
between the vanes or laths and fall on the upper surfaces of the latter, which on
account of their inclination cause the particles to fall from one vane to another,
until they arrive at the outer edges of the vanes or laths, from which these said
particles are received by suitable troughs, from whence they are removed in any
suitable manner.
The vanes or laths may be made of paper, glass, metal, or of any other suitable
material, and the said vanes may be connected in such a manner that the distance
between same may be adjusted simultaneously at one or more operations as
desired.
In the upper part of the machine, and between the exhaust and the vanes herein-
before described, we provide a screen composed of longitudinal slots through
which air is drawn, and over these slots we provide baffle plates or guards which
give the air a downward turn, so that the fluff or light particles which have not
been arrested at the vanes, is or are caught in troughs or other receptacles provided
for the purpose.
Our arrangement of vanes or laths may be employed at the tail end of the
machine for drawing the remainder of the fluff from the middlings, semolina, or
other material under treatment, after such material has passed through the herein-
before mentioned purifying operation. In this arrangement the vanes are arranged
like a venetian blind, and the material is allowed to flow down same, falling from
one vane to the other, whilst air is drawn through and between the vanes, taking
the remainder of the fluff and depositing it in a suitable receptacle.
According to our invention, a much greater efficiency is attained than has hitherto
been practicable, and the work can be performed by a less powerful exhaust than
hitherto necessary.
Dated this 14th day of June 1892.

page_text: COMPLETE SPECIFICATION.
Improvements in or connected with Purifiers for Middlings and
other like Products.
We, JOSEPH BARRON of Whitehall Road, Leeds, Corn Mill Engineer, and
SAMUEL GREEN of Back Bank Street, Castleford, Corn Miller, both in the County
of York, 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:―
The object of our invention is to provide apparatus for separating substances of
different specific gravities, and which apparatus is particularly applicable for
purifying middlings, semolina, and "dunst."
In order that our invention may be clearly understood we will proceed to describe
same with reference to the accompanying drawings in which similar letters refer to
like parts in all the figures.
Figure 1 is a longitudinal section of a machine constructed according to our
invention.
Figure 2 is a cross section of the same machine.
Figures 3 and 4 are respectively cross section and plan of a part of the machine
drawn to a larger scale than the two previous figures.
According to our invention and when applied to middlings purifiers we employ
the ordinary vibrating sieve A having an air chamber B above same from which
air is exhausted by the fan C. Over the sieve A and attached to the framework
thereof, we provide a series of parallel vanes or laths E, so arranged that they
form a series of steps descending from the centre to the sides of the sieve. The
vanes E may conveniently be made of sheet metal and have their under sides pointed
in a V shape towards the sieve A over which they are supported. It may be advan-
tageous to incline these vanes E downwards towards the troughs F.
By arranging the vanes E in the step like manner above described, spaces are
made between the said vanes E the width of which spaces may be varied to suit
the requirements of different materials to be treated. Such variation in width may
be adjusted by screws or by other suitable means, should it be desired to employ
one machine for different kinds of work. FF are troughs situated at the sides of
the sieve frame E¹ and attached thereto. G is a clearing brush supported by
guides G and actuated by chain G; H, H, are supporting links for suspending
the frame E. J is a connecting rod for communicating a reciprocating motion
from the crank shaft J to the sieve A. S is a hopper for feeding the material to
be treated onto the sieve A. L is a spout for receiving the tailings. M, is a
trough provided with a traveller M' consisting of a bladed shaft or other suitable
means for removing the "throughs" which pass through the sieve A and fall into
the trough M.
In the upper part of the machine, between the exhaust fan C and the vanes E we
provide a dust screen or catcher composed of longitudinal troughs N having spaces
between same, such troughs N being provided with deflectors N'. A brush or
other sweeper O is provided, carried by chains P, P, the said brush O being for
sweeping the dust, caught in the troughs N, along to the end of the machine where
it is received by a hopper R. The longitudinal troughs N may be constructed on
an incline towards the tail end of the machine and they may be caused to vibrate
with the sieve A or separately therefrom. In this manner the brush O could be
dispensed with.
The action of the machine is as follows
:-
The material is fed into the hopper S from whence it passes onto the sieve A,
which receiving a short reciprocating movement and being on a slight incline, feeds
the material along the sieve A towards the tail end of same. The heavy fine
particles pass through the sieve A and are received in the trough M from whence

page_text: they are removed by the traveller M. The light particles are lifted by the air
passing upwards through the sieve A and pass through between the vanes E which
throw the said light particles towards the sides of the machine. Some of these
particles reach the troughs F F by the impulse of their passage between the
vanes E, other particles fall down, step by step, until they reach the troughs F F
by which latter they are fed away. Although the majority of the light particles
are caught in the troughs F F there are still some very light particles floating in
the chamber B, and these are caught in their upward flight by the troughs N into
which they are deflected by the deflectors N¹. These particles are then swept by
the brush O into the receiver R.
The coarse heavy particles pass along the surface of the sieve A until they arrive
at the tail end of same, when they fall into the spout L from whence they are
removed or fed away by any suitable means.
The arrangement of vanes E may be employed at the tail end of the machine
for drawing the remainder of the fluff from the material. In this arrangement
the vanes are arranged like a venetian blind, and the material is allowed to flow
down same, falling from one vane to the other whilst air is drawn through between
the vanes carrying with it the remainder of the fluff and depositing same in a
suitable receptacle.
By the employment of machines constructed according to our invention the
work can be performed by a less powerful exhaust than has hitherto been neces-
sary, and the air ejected by the fan C is in a pure state and can consequently be
ejected direct into the room or mill where the machine is at work.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. In purifiers for middlings and other like products, the vanes or laths E, sub-
stantially as and for the purposes set forth.
2. In purifiers for middlings and other like products, the troughs N having
deflectors N', substantially as and for the purposes herein set forth.
3. The vanes or laths E having ✓ shaped under parts, in combination with the
sieve A, frame E¹, and troughs F F, substantially as and for the purposes
set forth.
4. The combination with the vanes or laths E and parts connected therewith, of
the troughs N having deflectors N₁ and brush O, substantially as and for the
purposes set forth.
Dated this 15th day of October 1900
BREWER & SON,
Leeds and London, Agents for Applicants.