IMPROVEMENTS IN CENTRIFUGAL DRESSING AND PURIFYING MACHINERY FOR TREATING FLOUR PROVISIONAL SPECIFICATION OR SUBSTAN
Year: 1880

page_text: LETTERS PATENT to Henry Simon, of No. 7, St. Peter's Square, Manchester,
in the County of Lancaster, for an Invention of "IMPROVEMENTS IN
CENTRIFUGAL DRESSING AND PURIFYING MACHINERY FOR TREATING FLOUR
PROVISIONAL SPECIFICATION left by the said Henry Simon at the Office
of the Commissioners of Patents on the 2nd October 1880.
.
HENRY SIMON, of No. 7, St. Peter's Square, Manchester, in the County of
Lancaster. "IMPROVEMENTS IN CENTRIFUGAL DRESSING AND PURIFYING
MACHINERY FOR TREATING FLOUR AND OTHER PULVERULENT OR GRANULAR
SUBSTANCES. [A communication from abroad by Gustav Daverio, of Oberstrass,
near Zurich, Switzerland.]
"
In the centrifugal dressing and purifying machines usually employed for treating
flour and other pulverulent and granular substances, considerable space is incon-
veniently occupied under the screening cylinder for the passage and removal of the
screened material. In order to avoid this inconvenience, and to render the
construction and arrangement of such a machine more simple and compact, it is,
according to this Invention, constructed as follows:-
The screening cylinder or drum within which the beaters revolve, and which is
covered with silk, wire gauze, or other porous fabric,
mounted so as to revolve
within a casing which, in its lower portion, is of cylindrical form. To the outer surface
of the screening cylinder or drum are attached helical or oblique scrapers or blades,
which, in revolving in contact with or in close contiguity to the surface of the
stationary casing, detach the flour or other substance deposited thereon and cause it to.
travel towards the delivery end of the casing whence it is discharged. The helical
scrapers may either be in the form of continuous blades extending the whole length
of the screening cylinder, or they may be made in separate short lengths so
arranged round the cylinder that one blade transfers the flour or other material.
lying in its path on to the path of the next blade, which in its turn conveys it on
:

page_text: to the path of the following one, and so on. The scrapers may be of metal, wood,
leather, or other material, or they may be brushes. By preference they are
mounted so as to be readily detachable from the screening cylinder or drum for
facilitating the repair either of the screening surface or of the scrapers.
The above described improved apparatus may also be applied for purifying
middlings, in which case the framework of the screening cylinder is employed
without the porous covering or screening surface, and serves simply to carry the
before mentioned helical or oblique blades or brushes, which serve both to convey
the material treated to the delivery end of the casing as described, and also to beat
it up into a cloud by their centrifugal action. The casing is in this case provided
with two longitudinal slits or openings at a convenient distance from each other,
and a current of air being made to enter by the one slit and after passing through
the cloud of flour or other material to be purified, to pass out through the other
slit, carries with it the lighter particles which it is desired to remove, while the
coarser particles are conveyed by the blades towards the delivery end as described,
being in their course repeatedly beaten up and subjected to the action of the air
current.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Henry Simon in the Great Seal Patent Office on the 1st April
1881.
HENRY SIMON, of No. 7, St. Peter's Square, Manchester, in the County of
Lancaster. " IMPROVEMENTS IN CENTRIFUGAL DRESSING AND PURIFYING
MACHINERY FOR TREATING FLOUR AND OTHER PULVERULENT OR GRANULAR
SUBSTANCES." cominunication from abroad by Gustav Daverio, of Oberstrass,
near Zurich, Switzerland.
In the centrifugal dressing and purifying machines usually employed for treating
flour and other pulverulent and granular substances, considerable space is incon-
veniently occupied under the screening cylinder for the passage and removal of the
screened material. In order to avoid this inconvenience, and to render the
construction and arrangement of such a machine more simple and compact, it is,
according to this Invention, constructed as follows:-
The screening cylinder or drum within which the beaters revolve, and which is
covered with silk, wire gauze, or other porous fabric, is mounted so as to revolve
within a casing which, in its lower portion, is of cylindrical form. To the outer
surface of the screening cylinder or drum are attached helical or oblique scrapers
or blades, which, in revolving in contact with or in close contiguity to the surface
of the stationary casing, detach the flour or other substance deposited thereon
and cause it to travel towards the delivery end of the casing, whence it is
discharged. The helical scrapers may either be in the form of continuous blades
extending the whole length of the screening cylinder, or they may be made in

page_text: separate short lengths so arranged round the cylinder that one blade transfers the
flour or other material lying in its path on to the path of the next blade, which in
its turn conveys it on to the path of the following one, and so on.
The scrapers
may be of metal, wood, leather, or other material, or they may be brushes. By
preference they are mounted so as to be readily detachable from the screening
cylinder or drum for facilitating the repair either of the screening surface or of
the scrapers.
The above described improved apparatus may also be applied for purifying
middlings, in which case the framework of the screening cylinder is employed without
the porous covering or screening surface, and serves simply to carry the before
mentioned belical or oblique blades or brushes, which serve both to convey the
material treated to the delivery end of the casing, as described, and also to beat
it up into a cloud by their centrifugal action. The casing is in this case provided
with two longitudinal slits or openings at a convenient distance from each other,
and a current of air being made to enter by the one slit, and after passing through
the cloud of flour or other material to be purified to pass out through the other
slit, carries with it the lighter particles which it is desired to remove, while the
coarser particles are conveyed by the blades towards the delivery end as described,
being in their course repeatedly beaten up and subjected to the action of the air
Fig. 1 of the accompanying Drawings shews a longitudinal section of a dressing
and purifying machine having the before described improvements applied thereto,
and shewing the screening cylinder with its oblique scrapers partly in elevation;
Fig. 2 shews an end view, and Fig. 3 a cross section.
The revolving screening cylinder A, with its internal revolving beaters B, is
of ordinary construction, but the casing C is formed cylindrical at bottom, and
upon the longitudinal bars of the cylinder A are fixed a series of oblique or helical
scrapers, blades, or brushes D, of such a form as, in rotating with the cylinder, to
pass in contact with the cylindrical surface of the casing, whereby each blade is
inade to convey the flour or other substance that has passed through the screening
surface of the drum on to the said cylindrical casing into the path of the next
scraper or blade, which in its turn delivers it into the path of the following one in
the direction from the inlet end at X of the machine to the outlet end at Y, thereby
conveying the said flour towards the outlet, which is not shewn on the Drawing,
and which may either be at the extreme end of the casing or at a short distance
therefrom. In the latter case it is preferred to fix one or more of the last blades D
in a reversed position, so as to gather the screened material that is conveyed
towards it or them together, and convey it to the outlet opening, which may either
be at the bottom of the casing, or at any convenient higher point to which the
screened material will then be lifted by the blades. E is the inlet for introducing
the flour or material to be operated upon into the drum A, and F is the outlet for
the discharge of the coarser material from the inside of the drum.
The upper part of the casing C may either be rectangular, as shewn, with sliding
d. ors at C, as usual with such machines, or it may be made entirely cylindrical, so
that the scrapers may in revolving act upon its entire surface for removing the
deposit of screened material therefrom. Figs. 4 and 5 shew respectively a part
longitudinal section and a transverse section of a machine with cylindrical casing
as adapted to operate as a "middlings purifier.” In this case there is substituted
for the revolving screening drum and beaters a framing of longitudinal bars G, on
which are fixed the oblique blades H, which, in revolving with the framing,
repeatedly catch up the middlings or other material as it is introduced into the
machine at one end, and beat it into a cloud, and at the same time gradually
convey it towards the outlet end. The casing I has two lateral orifices or slits K, L,
extending along it, of which K is open to the atmosphere, while L is connected to

page_text: an exhaust of any suitable description, so that a current of air is made to pass.
transversely through the machine while the material is being beaten up, as
described, whereby the lighter particles, such as husks, &c., which it is desired to
remove are carried off through the opening L.
Having thus described the nature of the said Invention and in what manner the
same is to be performed, as communicated to me by my foreign correspondent, I
claim,―-
First. The use of centrifugal dressing or screening machinery, wherein the lower
part or the whole of the stationary casing is made of cylindrical form, while the
revolving screening drum or cylinder is provided on its outer surface with oblique
or helical blades, which, in revolving, convey the screened material deposited on
the casing towards the delivery end of the machine, substantially as herein
described.
Second. The use of centrifugal purifying machinery, wherein oblique or helical
blades mounted on a framing are caused to revolve inside a cylindrical casing so as
both to beat up the middlings or other material to be operated upon, and to convey
the same from the inlet end to the outlet end of the casing, substantially as herein
described.
Third. In combination with purifying machinery constructed and operating as
set forth in the preceding claim, the provision of a longitudinal inlet opening for
air at one part of the casing, and a longitudinal outlet opening for air at another
part of the casing, the outlet opening, being connected to a suction so as to cause a
current of air to pass transversely through the casing while the material operated
upon is being beaten up by the said blades, substantially as and for the purposes
herein described.
In witness whereof, I, the said Henry Simon, have hereunto set my hand and
seal, this Thirtieth day of March, in the year of our Lord One thousand
eight hundred and eighty one.
HENRY SIMON. (L.S.)