Improvements in Separating Dust and other Substances from Wheat or other Cereals, and in Apparatus therefor.
Year: 1896

page_text: Date of Application, 4th June, 1896
Complete Specification Left, 27th Feb., 1897-Accepted, 10th Apr., 1897
Improvements in Separating Dust and other Substances from Wheat
or other Cereals, and in Apparatus therefor.
1 ARTHUR MAURICE ROBINSON of Railway Works, Rochdale in the County
of Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to separaté dust or other objectionable substances
from wheat more particularly at the commencement of its passage through a mill
in a more efficient manner than has heretofore been done and without the use of
large and cumbrous reeling and fanning appliances, and I accomplish this by first
silting out a great portion of the dust from the wheat, then separating the wheat
from sticks or other substances which are usually mixed therewith, and finally
passing a current of air through the wheat to remove any dust that may still be
mingled therewith. The dust withdrawn by the air current is deposited in a
hopper or collecting chamber in any convenient manner..
Convenient apparatus for carrying out the above treatment is composed of a
horizontal rotary screen having two sizes of mesh, one of which will allow dust or
particles of less size than grains of wheat to pass through, the other size of mesh
being sufficiently large to allow grains of wheat to pass through; hoppers or spouts
to receive the dust, wheat, and tailings, respectively; and an air trunk or trunks,
dust collecting chamber, and fan, or other aspirating appliance, to remove any dust
which may remain amongst the wheat after passing through the screen.
Dated the 3rd day of June 1896.
W. B. JOHNSON.
Agent.
Improvements in Separating Dust and other Substances from Wheat
or other Cereals, and in Apparatus therefor.
I ARTHUR MAURICE ROBINSON of Railway Works, Rochdale, in the County
of Lancaster, 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 :-
The object of this invention is to separate dust or other objectionable substances
from wheat more particularly at the commencement of its passage through a mill,
in a more efficient manner than has heretofore been done, and without the use of
large and cumbrous reeling and fanning appliances; and I accomplish this by first
sifting ont a great portion of the dust from the wheat then separating the wheat
from sticks or other substances which are usually mixed therewith, and fiually
passing a current of air through the wheat to remove any dust that may still be
mingled therewith. The dust withdrawn by the air current is deposited in a hopper
or collecting chamber in any convenient manner.
Convenient apparatus for carrying out the above treatment is composed of a
borizontal rotary screen having two sizes of mesh, one of which will allow dust or
particles of less size than grains of wheat to pass through, the other size of mesh

page_text: being sufficiently large to allow grains of wheat to pass through; hoppers or spouts
to receive the dust, wheat, and tailings respectively; and au air trunk or trunks,
dust collecting chamber, and fan, or other aspirating appliance to remove any dust
which may remain amongst the wheat after passing through the screen.
DESCRIPTION OF THE DRAWINGS.
Fig. 1. is a vertical section, partly in elevation, and Fig. 2. is a plan, of apparatus
for carrying my invention into practice.
a is a horizontal rotary screen of any convenient construction supported by
hangers b attached to the frame and driven by a crank più on the wheel c. in the
usual manner. The wheat to be freed from dust or other objectionable matter is
fed to the interior of the screen a. through a feed spout d. connected to the screen
by a flexible air tight sleeve d¹. The sieving surface of the screen a. from a¹ to a²
has a mesh of such size as will allow dust, sand &c. to pass through, but will not
allow: grains of wheat to pass through. From a² to as the sieving surface has a
mesh which will allow grains of wheat to pass through, but will not allow straws,
sticks or other substances larger than grains of wheat to pass through. The dust
&c. which passes. through the sieving surface a a², is received in a hopper e anl
conducted by means of a flexible airtight sleeve e' to a spout f. whence it can be
passed away as desired. The wheat which passes through the sieving surface a² a³
is received in hoppers g. and conducted by means of flexible air tight sleeves g¹ to
spouts h. whence it is fed into an air trunk i. through which a current of air is
drawn by means of a fan j.. Any dust or chaff which may be mixed with the
wheat alter passing the sieve is, by the current of air, separated from the wheat
and deposited, either wholly or in part, in the dust collecting chamber k. which is
of any ordinary kind. The wheat separated from the dust and other substances
passes down the spout 7 to any desired place.
The straws, sticks, and other. substances too large to pass through the sieving
surface. a a pass into a hopper m from whence they are conducted by means of a
flexible air tight sleeve to a spout n and led away as desired.
I do not confine myself to the particular arrangements above described for
carrying out my, invention as many modifications may be made without departing
from the nature of my said invention.
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-
.
First. The process of separating dust. and other substances from wheat or other
cereals by sifting out a portion of such dust and other substances and then passing
the wheat or other cereals through an air current to remove the remainder of the
dust or other substances substantially as set forth.
Second. The process of separating dust and other substances from wheat or other
cereals by first sifting out a portion of the dust, then separating sticks, straws, and
other larger substances from the wheat and finally passing the wheat through an
air current to remove the remainder of the dust and other substances substantially
as set forth.
Third. Apparatus for separating, dust and other substances from wheat or other
cereals consisting of sieves or screens with different sizes of mesh, hoppers or
spouts for receiving the separated substances and the wheat, and an air trunk or
trunks, dust collecting chamber, and fan or other aspirating appliance, all substan-
tially as set forth.
Dated this Twenty-sixth day of February 1897.
W. B. JOHNSON,
4.Clayton Square, Liverpool, Agent.