IMPROVED HORIZONTAL CENTRIFUGAL SIFTING MACHINE
Year: 1872

page_text: LETTERS PATENT to Edward Thomas Hughes, of the Firm of Hughes
-
and Son, Patent Agents, 123, Chancery Lane, London, for the In-
vention of "IMPROVED HORIZONTAL CENTRIFUGAL SIFTING MACHINE."-
A. communication from abroad by John Wernz, of Erpolzheim,
Bavaria.
Sealed the 14th February 1873, and dated the 14th August 1872.
.
PROVISIONAL SPECIFICATION left by the said Edward Thomas Hughes
at the Office of the Commissioners of Patents, with his. Petition,
on the 14th August 1872.
I, EDWARD THOMAS HUGHES, of the Firm of Hughes and Son, Patent
Agents, 123, Chancery Lane, London, do hereby declare the nature
of the said Invention for "IMPROVED HORIZONTAL CENTRIFUGAL SIFTING MA.
CHINE," a communication to me from abroad by John Wernz, of
Erpolzheim, Bavaria, to be as follows:-
This Invention is intended to be used for sifting ground or pulverized
matters of all descriptions, but it is especially adapted for the manufac-
ture of flour, and the sifting is effected by giving to a circular sieve a
horizontal revolving and eccentric motion in opposite directions.
•

page_text: The sieve is connected to a circular frame carried by a pivot on the
top of a balanced vertical cranked' shaft fitted to bearings fixed in the
framework of the machine, the crank in the shaft being for the purpose
of placing the pivot which carries the frame and sieve out of the centre of
the part of the shaft working in bearings: The upper bearing is cast or
fixed to a table having a circular rim, and to this table is fixed the box
or case enclosing the sieve, the matters to be sifted being passed through
an opening at the top of the box. At the bottom of the sievo frame there
is a rim concentric with the pivot at the top of the shaft; and this rim
revolves in contact with the rim on the table which is concentric with
the bearings, so that when revolving motion is given to the shaft by a
pulley or other means the frame and sieve turn round in one direction.
and also have an eccentric revolving motion in another direction, there
being leather on one of the rims to give the required friction.
The sieve is held to the frame by wooden rings which can be readily
shifted and replaced, thereby affording the facility of employing sieves of
different meshes as may be required, and the sifted matters pass through.
openings in the frame to any desired place or receptacle, the bran or
refuse after being driven off the sieve by the centrifugal action passing
through one or more openings at the bottom of the box.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edward Thomas Hughes in the Great Seal Patent
: Office on the 14th February 1873.
-TO-ALL-TO-WHOM THESE PRESENTS SHALL COME, I, EDWARD
THOMAS. HUGHES, of the Firm of Hughes and Son, Patent Agents, 128, a
Chancery Lane, London, send greeting.
2 -
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourteenth day of August, in the year
of our Lord One thousand eight hundred and seventy-two, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors; give
and grant unto me, the said Edward Thomas Hughes,, Her special licence
that. I, the said Edward Thomas Hughes, my executors,, administrators;.
and assigns, or such others as I, 'the said Edward Thomas Hughes, my.
executors, administrators, and assigns, should. at any time agree with;

page_text: 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 "IMPROVED HORIZONTAL
CENTRIFUGAL SIFTING MACHINE," a communication to me from abroad by
John Wernz, of Erpolzheim, Bavaria, upon the condition (amongst
others) that I, the said Edward Thomas Hughes, my executors or ad-
ministrators, 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 Edward Thomas Hughes, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement, reference being had to the figures on the
accompanying Sheet of Drawings, and to the letters of reference marked
thereon, that is to say :—
This Invention is intended to be used for sifting ground or pulverized
matters of all descriptions, but it is especially adapted for the manufac-
ture of flour, and the sifting is effected by giving a sieve a horizontal
revolving and eccentric motion in opposite directions.
-
The sieve is connected to a circular metal frame having at the top a
"pin or pivot working in a step or bearing at the top of a balanced
vertical cranked shaft working in stationary bearings, the crank in the
shaft being for the purpose of placing the pin or pivot which carries the
frame and sieve out of the centre of the part of the shaft working in
bearings. The upper bearing of the cranked shaft is connected to a
foundation plate or table having a circular rim, and on this plate is
placed the jacket or case enclosing the sieve, the matters to be sifted
being passed through an opening in the cover of the jacket or case. At
the bottom of the sieve frame there is a flange or rim concentric with
the pivot at the top of the cranked shaft, and this flange revolves in
contact with the rim on the foundation plate, which rim is concentric
with the axis and bearings of the cranked shaft, so that when revolving
motion is given to the shaft by a pulley or other means the frame and

page_text: sieve will revolve in one direction and also have an eccentric revolving
motion in the reverse direction, there being leather or other suitable
material on the flange to give the required friction.
The sieve is held to its frame by wooden rings which can be readily
shifted and replaced, thereby affording the facility of having sieves of
different meshes, as may be required, and the process of sifting can be
accelerated by causing the gauze to be rubbed by strips of cloth to
prevent the choking of the meshes.
On the accompanying Sheet of Drawings Fig. 1 is a vertical section of
the improved horizontal centrifugal sifting machine, and Fig. 2 a plan
of some of the parts.
C, C, C, represent the framework of the machine; B, the foundation
plate or table fixed to the top of the framework; R, R, the cranked shaft ;
f, the pin or pivot at the bottom of the shaft; i, i, the bearing for the
upper part of the shaft; 2, %, the sieve; D, the metal frame which
carries it; E, the jacket or case enclosing the sieve; F, the cover of the
jacket; d, the pin or pivot which carries the sieve frame and sieve, the
pin working in a step or bearing at the upper end of the cranked shaft;
x, x, y, y, are the wooden rings by which the sieve is held to the sieve
frame; k, k, the leathered flangeat the bottom of the sieve frame and
concentric with the pivot at the top; a, the counterbalance weight
for balancing the cranked shaft, sieve frame, and sieve; e, e, a circular
rim fixed to the foundation plate B for enclosing the counterbalance
weight; and b, b, the circular rim on the foundation plate B with which
the leathered flange k, k, is in contact for giving the sieve frame and
sieve the reverse eccentric motion.
The sifted flour or other matter which has passed through the meshes
of the sieve pass through openings g, Fig. 2, in the sieve frame D to the
annular space between the rims e, e, and b, b, and the bran, husks, or
other matters which cannot pass through the meshes are carried by a
centrifugal action to the annular spaco between the rim b, b, and the
jacket E, and the drivers or scrapers o move the sifted flour or other
matter, and also the bran or husks to their respective openings leading
to any required places or receptacles.
The number of revolutions of the cranked shaft and sieve are varied :
according to the requirements and dimensions of the machine, the

page_text: number in some cases being 170 per minute, but whatever the number
may be there is a centrifugal action which moves the matters outwards,
thereby effectually separating the smaller parts from the larger, and in
the manufacture of flour a finer gauze than usual can be employed,
inasmuch as the bran scarcely comes in contact with the gauze, and in
all cases the sieves may be much smaller than those usually employed,
and the wear of the machines is very little if they are solidly constructed
and well lubricated.
Having thus described the nature and particulars of the said Inven-
tion, as communicated to me from abroad, I claim the improved
horizontal centrifugal sifting machine, as herein-described and shewn
on the Drawings.
In witness whereof, I, the said Edward Thomas Hughes, have here-
unto set my hand and seal, this Thirteenth day of February,
in the year of our Lord One thousand eight hundred and seventy-
three.