Improvements in or relating to Apparatus for Cleaning Grain or other Seeds, for Purifying Semolina, Middlings, and the like, or for Dressing Fine Particles from Coarse Particles in Pulverized or Ground Material from Disintegrators, Grinding Mills, or the like.
Year: 1894

page_text: Date of Application, 17th Nov.. 1894
Complete Specification Left, 29th Aug., 1895-Accepted, 16th Nov.. 1895
PROVISIONAL SPECIFICATION.
Improvements in or relating to Apparatus for Cleaning Grain or
other Seeds, for Purifying Semolina, Middlings, and the like, or
for Dressing Fine Particles from Coarse Particles in Pulverized
or Ground Material from Disintegrators, Grinding Mills, or
the like.
I, JAMES HIGGINBOTTOM, of 32, Seel Street, Liverpool, in the County of
Lancaster, Milling Engineer, do hereby declare the nature of this invention to be
as follows:-
This invention is applicable to all forms of vibrating or rotary sieves in which
downward air currents are used through the material upon the sieve itself for
cleaning or separating wheat, or for separating flour from meals, or for separating
the material leaving almost any description of grinding or pulverising mills or for
purifying semolina, middlings or the like.
The objects of my invention are firstly, to distribute the downward current of
air practically equal all over the sieve surface, secondly, to deposit collect, and
discharge automatically, the dust or material which may be held in suspension in
the downward air current. By my invention the downward air current is rendered
purer before it passes through the material upon the sieve, and through the sieve
itself.
In carrying out my invention I place a tray of nozzles or cones or channels over
I may arrange
the sieve, through which the downward air current is to be sent.
such tray of nozzles or cones or channels either to move with the sieve, or to be
stationary. Two trays or sets of nozzles, channels, or cones, can be superimposed
one over the other at a short distance and the other set in some instances may be
reversed so that the small ends of the cones or spaces between the channels are
downward in the upper sieve, and upward in the lower, thus the air is contracted
at the mouths of the orifices of the upper tray and projected downwards against
the channels below, or the orifices can be and in some instances it may be
preferable that they should be exactly one over the other instead of as in the
variation previously described where the orifices of one set are in vertical line with
the centres of the channels of the other set. The dust or material contained in the
downward air current is deposited in the channels or upon the tray in the spaces
between the nozzles or cones and is automatically conducted and discharged froin
these by means of a collecting channel, by brushes, worms, or other wellknown
devices to the exterior of the sieve. I prefer to make the nozzles or cones of the
lower tray with their wider ends nearest the sieve. When using channels for the
lower tray, I preferably place them so that the widest part of the spaces between
the channels is nearest the sieve. The upper tray not being necessarily required
to collect materials, but to guide and change the force of the current, can be formed
as square, round or other tubes, or wooden or other bars.
Dated the 16th day of November 1894.
W. P. THOMPSON & Co.,
Of 6 Lord Street, Liverpool, Patent Agents for the Applicant.

page_text: Improvements in or relating to Apparatus for Cleaning Grain or
other Seeds, for Purifying Semolina, Middlings, and the like, or
for Dressing Fine Particles from Coarse Particles in Pulverized
or Ground Material from Disintegrators, Grinding Mills, or
the like.
I, JAMES HIGGINBOTTOM, of 32, Seel Street, Liverpool, in the County of
Lancaster, Milling 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 is applicable to all forms of vibrating or rotary sieves in which
downward air currents are used through the material upon the sieve itself for
cleaning or separating wheat, or for separating flour from meals, or for separating
the material leaving almost any description of grinding or pulverising mills or for
purifying semolina, middlings or the like.
The objects of my invention are firstly, to distribute the downward current of
air practically equally all over the sieve surface, secondly, to deposit, collect and
discharge automatically, the dust or material which may be held in suspension in
the downward air current. By my invention the downward air current is rendered
purer before it passes through the material upon the sieve, and through the sieve
itself.
In carrying out my invention which is shown in élevation and cross section on the
accompanying drawing, I place a tray A of nozzles or cones or channels B over the
sieve C through which the downward air current is to be sent and hoods D directly
over such nozzles or channels. I may arrange such tray of nozzles or cones or
channels either to move with the sieve, or to be stationary. Two trays or sets of
nozzles, channels or cones, can be superimposed one over the other at a short
distance and the other set in some instances may be reversed so that the small ends
of the cones or spaces between the channels are downward in the upper sieve, and
upward in the lower, thus the air is contracted at the mouth of the orifices of the
upper tray and projected downwards against the channels below or the orifices can
be, and in some cases it may be preferable that they should be, exactly one over the
other instead of as in the variation previously described where the orifices of one set are
in vertical line with the centres of the channels of the other set. The dust or material
contained in the downward air current is deposited in the channels or upon the tray
in the spaces E between the nozzles or cones and is automatically conducted and
discharged from these by means of a collecting channel by brushes, worms or other
wellknown devices to the exterior of the sieve. I prefer to make the nozzles or
cones of the lower tray A with their wider ends nearest the sieve as shown. When
using channels for the lower tray, I preferably place them so that the widest part
of the spaces between the channels is nearest the sieve.
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 improvement in the process of cleaning grain from seeds, purifying
semolina, middlings and the like and for dressing fine particles from coarse ones,
which consists in exposing the material while agitated on the sieve to a downward
current of air so arranged as to impact with nearly equal force all over the surface
of the sieve, and collecting and separating the dust from that downward current
before it (again or otherwise) reaches the materials to be treated.

page_text: 2. The apparatus substantially as and for the purposes described, consisting of
an agitated sieve apparatus for producing a downward current through such sieve
and a tray or trays of nozzles or a tray of nozzles and grid or hoods placed above
the sieve.
Dated this 28th day of August 1895.
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Birmingham, and London, Patent Agents.