IMPROVEMENTS IN MACHINERY FOR CLEANING GRAIN, RICE, OR SEEDS, OR BOLTING FLOUR, AND SEPERATING Menne
Year: 1875

page_text: LETTERS PATENT to Augustus Bryant Childs, of No: 16, Mark Lane,
London, for the Invention of.“ IMPROVEMENTS IN MACHINERY FOR
CLEANING GRAIN, RICE, OR SEEDS, OR BOLTING FLOUR, AND SEPERATING
Menne TAN
وو
PROVISIONAL SPECIFICATION left by the said Augustus Bryant
Childs at the Office of the Commissioners of Patents, with his
Petition, on the 23rd December 1875..
66
I, AUGUSTUS BRYANT CHILDS, of No. 16, Mark Lane, London, do.
hereby declare the nature of my said Invention for
IMPROVEMENTS IN
MACHINERY FOR CLEANING GRAIN, RICE, OR SEEDS, OR BOLTING FLOUR, AND
SEPERATING AND PURIFYING MIDDLINGS THEREFROM," to be as follows:-
The improvement consists in means for uniformly distributing the
blast or exhaust drawn up through the bolting screens or silks for the
purpose of preventing any portion of the screens or silks from choking
}

page_text: or pasteing, and keeping them clean, so as to cause all parts of their
surfaces to perform duty and allow a free passage of air through the
said screens or silks at all times. This improvement is more particularly
supplemental to my Patent dated 27th April 1874, but may be used in
connection with other machines intended to perform the same or similar
functions, and is specially applicable to purefying middlings.
.
The construction of the machine represented by my Patent of the
27th of April 1874, draws the air bodily in at the centre and sides of
the hopper, which more-or-less-prevents it being uniformly distributed
over or through the entire surface of the silks, so much so, that there is
reason to beleive that the current of air through some parts of the silk
is more than is required, while at other portions it is not sufficient
strong to keep them clean, and consequently 'causes them to choke or
paste this defect I propose to remedy by an air distributor, before
mentioned.
The air is usually drawn up through the screens or silks by
exhaustion.
The air distributors may be attached to the screen frame or frame of
the machine and made adjustable, and are usually placed about two
inches and a half more or less from the under sides of the silks.
The distributors may be composed of perforated metal plates or wood,
provided with any required form of air passage, or strips of wood of the
required thickness and width may be employed, and arranged together
so as to provide as series of air passages from three-quarters of an inch
to one inch apart, more or less, and about a sixteenth to an eighth of an
inch wide. When the distributor is thus constructed the air passages
are usually placed parallel to the length of the machine, but may be
arranged otherwise if desired. The size, and form of the air passages in
the distributor are governed more or less by the fineness or coarseness of
the screen or silks and the kind of work which the machine may be
employed to do.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Augustus Bryant Childs in the Great Seal Patent
Office on the 19th June 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, AUGUSTUS
BRYANT CHILDS, of No. 16, Mark Lane, London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-third day of December, in the
year of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Augustus Bryant Childs,
Her special licence that I, the said Augustus Bryant Childs, my exe-
cutors, administrators, and assigns, or such others as I, the said Augustus
Bryant Childs, my executors, administrators, and assigns, should
at any time agree with, and no others, from time to time and at all
times thereafter during the term therein expressed, should and lawfully
might make, use, exercise and vend, within the United Kingdom of
Great Britain and Ireland, the Channel Islands, and Isle of Man, an
Invention for "IMPROVEMENTS IN MACHINERY FOR CLEANING GRAIN, RICE,
OR SEEDS, OR BOLTING FLOUR, AND SEPARATING AND PURIFYING MIDDLINGS
THEREFROM," upon the condition (amongst others) that I, the said
Augustus Bryant Childs, my executors or administrators, by an
instrument in writing under my, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Augustus Bryant Childs, do hereby
declare the nature of my said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained
in and by the following statement :-
The improvement consists in means for uniformly distributing the
blast or exhaust drawn up through the bolting silks or screens for
the purpose of preventing any portion of the silks or screens from
chokeing or pasteing, and keeping them clean so as to cause all-parts of
their surfaces to perform duty and allow a free passage of air through

page_text: the said screens or silks at all times. This improvement is more
particularly supplemental to my Patent dated 27th April 1874, but may
be used in connection with other machines intended to perform the
same or similar functions, and is specially applicable to purifying
middlings.
The construction of the machine represented by my Patent of the
27th April 1874, draws the air bodly in at the centre and sides of the
hopper, which more or less prevents its being uniformly distributed
over or through the entire surface of the. silks, so much so that there
is reason to beleive the current of air through some parts of the silks is
more than is required, while at other portions it is not sufficient
strong to keep them clean, and consequently causes them to choke or
paste this defect, I propose to remedy by an air distributor, before
mentioned.
The air is usually drawn up through the screens or silks by
exhaustion.
. The air distributors may be attached to the screen frame or frame
of the machine, and made adjustable, and are usually placed about
two inches and a half, more or less, from the under sides of the silks.
.
The distributors may be composed of perforated metal plates or wood
provided with any required form of air passages, or strips of wood of
the required thickness and width may be employed and arranged
together so as to provide a series of air passages from three-quarters of
an inch to one inch. apart, more or less, and about a sixteenth to an
eighth of an inch wide. When the distributor is thus constructed the
air passages are usually placed parallel to the length of the machine,
but may be arranged otherwise if desired. The size and form of the
air passages in the distributors are goverened more or less by the fineness
or coarseness of the screens or silks and the kind of work which the
machine may be employed to do.
Reference will be made to the accompanying Drawings hereunto
annexed, forming part of this Specification, for giving a fuller under-
standing of the said Invention.
Fig. 1 is a longitudinal sectional elevation of the machine; Fig. 2 is
a transverse section of the same.
Fig. 3 is a separate and enlarged view of a perforated metal air

page_text: And is a distributor composed of strips of wood, as before
described.
The general structure and action of the machine, excepting the appli-
cation of the air distributor, is the same as that in my Patent, 27th
April 1874.
A, A, is the main chamber placed in an inclined position, and sup-
ported by the framing B, B, as shown; G, G, is the screen frame fit
into the lower part of the main chamber A, A. The screen frame is
provided with four screen boards O, C, C, O, covered with suitable
bolting silk, and arranged in steps, as represented in Fig. 1. D, D, is
the compensating air chamber provided with a regulating hinged valve g
which opens and closes for communicating with the external air to
increase or diminish the intensity of the exhaust, as may be required.
The air chamber D is made to communicate with the main
chamber A, A, by hinged valves d, d, d, d, attached to the top and
inside of the main chamber. E is the exhaust fan attached to the
lower end of the main chamber of the machine, and may be driven by
power through the medium of a belt taken from any suitable source:
The fan draws or exhausts the air from the machine through the
valves d, d, d, d, and compensating air chamber D.
The machine is supplied with air drawn in at the bottom and sides of
the hoppers L, L', which passes up through the air distributors m, m,
and silks S, S, and out of the machine through the chamber D and
exhaust fan E.
The middlings to be treated is first placed in the hopper fand fed to
the machine in any regular manner, usually by a revolving feed roll
worked by a belt from the shaft o.
-The screen frame receivés motion through two or more cams placed
on the shaft o, and made to act on the frame to give it the required
vertical motion to agitate the middlings; -the-cams are not shown in the
Drawings. The cam shaft o receives its motion by a belt from the fan
shaft E.
The following is a description of the action of the machine while in
operation-The fan E is set in motion, and by it other parts of the
machine are worked as before described. The middlings are placed in
the hopper and regularly fed into the machine over silks, which
descends on and passes over the series of silks or screen boards C, O, C, C,

page_text: attached to the main screen frame G. The finest of the middlings are
separated and purifyed as they pass over the first screen boards at the
upper end of the screen frame, and fall into the hopper L', while the
remaining or coarser portion of the middlings are separated and purifyed
as they pass over the two lower silks or boards and fall into the
hoppers L, L, the refuse from the screen frame is discharged at the tail
of the machine.
As before stated the machine is supplied with air by being drawn up
through the bottom of the hoppers and at their sides, and is drawn or
exhausted up through the silks while the screen frame is being
vertically shaken or jarred.
The fluf, dust, and other light foreign matter exhausted from the
middlings is drawn through the valves d, d, d, d, into the air chamber D,
and from thence exhausted by the fan into the open air or suitable
reseptacle..
The air distributors m, m, are placed about two inches and a half,
more or less, from the under sides of the silks S, S, and permanently
attached to the screen frame G, or they may be attached in some
manner for adjusting and varying the distance of the air distributors
from the silks, as practice may determine.
Having described the manner of constructing and working my said
Invention, what I claim is, the use of the air distributors made of any
suitable material and arranged with the machine, and used in the
manner and for the purposes represented and berein-before described.
In witness whereof, I, the said Augustus Bryant Childs, have 2
hereunto set my hand and seal, this Fourteenth day of June,
in the year of our Lord One thousand eight hundred and seventy-
six.

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