Improvements in or relating to Machinery or Apparatus for Sifting, Separating, Conveying and Collecting Broken Mineral and other Material..
Year: 1899

page_text: Date of Application, 20th Nov., 1899-Accepted, 17th Feb., 1900
COMPLETE SPECIFICATION.
Improvements in or relating to Machinery or Apparatus for Sifting,
Separating, Conveying and Collecting Broken Mineral and other
Material..
I, ANTON OBEREGGER, of Fohnsdorf. Styria, in the Empire of Austria, Mechanical
Engineer, 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 object of my invention is to effect improvements in or relating to the con-
struction and working of machinery or apparatus for sifting, separating, convey-
ing and collecting broken mineral and other material.
According to my invention I cause the materials to be operated upon to enter
rotary cylindrical vessels fitted externally or circumferentially with reticulated
or perforated material of various meshes supported by suitable framework, and
fitted internally with helical or analogous plates, which act as conveyors, whereby
the materials therein are carried forward from mesh to mesh, through which the
materials pass and become sifted and separated, falling into hoppers for collection
according to the relative sizes of the materials.
And in order that my said invention may be particularly described and as-
certained reference is hereby made to the accompanying drawings in which similar
letters of reference indicate corresponding parts.
Fig. 1 is a longitudinal section illustrating one form of my invention.
Fig. 2 is a section on the line a b of Fig. 1.
Figs. 3, 4 and
A
illustrate various modifications and details of my invention.
Referring to Figs. and 2, c is a cylinder rotating upon antifriction rollers d,
(omitted in Fig. 1 for greater clearness). The cylinder is formed externally with
reticulated or perforated material of one or more sizes or meshes as shown at of,
and is caused to rotate by driving the bearing wheels d, or by other suitable means.
99 are short helical plates (preferably perforated or consisting of frames fitted
with reticulated material) attached to the inner circumference of the cylinder,
so as to rotate therewith and carry or drive the materials forward. h is a feeding
hopper fitted with a plate i, whereby the falling materials are carried to the screw
propeller which drives the materials into the rotating cylinder. The finer
particles of the material travel to and fall through the fine meshes at e; the
coarser particles being carried to the larger meshes at f, and those which are too
large to pass through at f are projected from the open end at m into a suitable
receptacle, as indicated by the arrow.
In order to utilise cylinders of small diameter it is necessary to provide for
changing and renewing the reticulated material, long cylinders being used.
For this purpose a number of rings n and supporting rollers d d are fitted,
whereby the cylinder is suitably supported while under repair or alteration.
Fig. 3 is a sectional elevation of a portion of a cylinder, illustrating another
method of fitting the perforated plates inside the cylinder. Additional plates g¹,
fitted at right angles to the plates g, have the effect of causing the materials to

page_text: travel in the directions indicated by the arrows, and thus facilitate the separa-
tion of the particles.
An additional, larger cylinder, concentrically placed, may also be fitted, as
indicated in Fig. 4, in order to obtain the required variation in the siftings
with shorter lengths of cylinders. In this case the internal cylinder c is fitted
with reticulated material of uniformly large dimensions, and the larger cylinder c
with similar material having smaller perforations. The helical plates 9 are
also formed with an increasing pitch towards the outer end, as shown, whereby
the finer particles are retained for a longer time under operation for separating
and discharging than the coarser particles, which are driven forwards at a greater
speed. In the annular space between the two cylinders additional helical
plates are fitted for operating upon the materials which fall through the inner
cylinder c into the annular space partially surrounding the same. By the arrange-
ment shown in Fig. 4 several different grades of sifting may be obtained as in-
dicated by the arrows.
Referring to Fig. 5, a modification of my invention is shown in which the
cylinder and the helical plates revolve independently and at similar or. different
speeds. o is the main driving shaft which actuates one or more of the bearing
rollers d whereby the cylinder is rotated. p is a pinion fast on the main shaft o
and gearing with the toothed wheel r. This wheel is fast on the shaft s, to which
shaft the arms tt and helical plates are fitted. vv are hoppers for receiving
the separated materials.
In some cases the cylinder may be stationary and the lower part only fitted
with reticulated material; the helical or other plates being mounted and driven
as described relatively to Fig. 5.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:
1. In machinery or apparatus for the purposes aforesaid, the combination of
a rotating cylinder fitted externally or circumferentially with reticulated material,
and internally with helical or analogous plates, either plain or perforated, sub-
stantially as herein before described and illustrated by Figs. 1, 2 and 3 of the
drawings.
2. In machinery or apparatus for the purposes aforesaid, the combination of
rotating concentric cylinders, the smaller cylinder being fitted with helices of
increasing pitch, and with or without a helice in the annular chamber between
the two cylinders, both cylinders being fitted circumferentially with reticulated
material, substantially as herein before described and illustrated by Fig. 4 of
the drawings,
3. In machinery or apparatus for the purposes aforesaid, the modification
thereof in which both the cylinder and helice are caused to revolve independently
the speeds of revolution being synchronous or otherwise, substantially as herein
before described and illustrated by Fig. 5 of the drawings.
-
4. In machinery or apparatus for the purposes aforesaid, the modification there-
of in which the cylinder is stationary and the helice rotates, the underside of the
cylinder only being fitted with reticulated or perforated material, substantially
as described.