Improvements in or relating to Separators for Granular or like Material.
Year: 1896

page_text: PROVISIONAL SPECIFICATION..
Improvements in or relating to Separators for Granular or like
Material.
I, WILHELM SELTNER, Engineer, of Schlan, Bohemia in the Empire of Austro-
Hungary, do hereby declare the nature of this invention to be as follows:-
This invention relates to separators for granular or like material. Apparatus
constructed, according to this invention is chiefly used in the dressing of ore and
serves for separating the grains and pieces of small size from larger pieces.
This apparatus consists of several series of bars having inclined or arc-like
projections or covers, which bars possess, openings of any desired shape and by
means of their continuous transverse walls are supported alternately in two frames.
...One series of bars is thus supported 'on or secured to the first frame and the other
half to the second frame.
The movement of the grating thus constituted is such that the series of bars
supported by 'one frame rise and the series of.bars. secured to the other frame
descend and vice versa; so that the alternate, ascending and descending of the bars
and their transverse walls, provides cavities into, which the material treated can
fall.
On these bars producing by their movement the, cavities aforesaid the coarser
material is moved and discharged at the end of the grating, the finer-pieces falling
through the grating.
This operation is therefore effected by raising the material when one inclined
series of bars rise and as soon as other bars,, moving downwards,, come to lie lower
than the first ones, the material falls down on to the lower bars, and so on.
In this way, the coarser material goes from bar to bar and is finally discharged
at the end of the grating as before, mentioned, while the finer material falls through
the grating.
When especially large pieces which rest at once on three or more bars are to be
separated, then transport devices, may be combined with, this separating grating
which devices help to move extra large pieces along the grate...
Such a transport device may consist simply of rotating cylindrical rods which
are arranged over each second. bar and which by their rotation cause, the larger
pieces to move on...
One series of bars. need. not reciprocate vertically, but may be stationary. The
second series then reciprocates vertically. The driving of the grating can be
effected in many different ways.
A simple way of driving the grating is the following:-bell-crank levers
keyed to a shaft are rocked by means of one or two connecting rods from a
crank shaft. A rocking movement is communicated to other bell-crank levers
keyed on another shaft by means of levers and connecting rods.
f
On the bell-crank levers are 'respectively secured the frames supporting the bars

page_text: These bell-crank levers thus communicate to the frames and therefore to the
series of bars the before-mentioned up and down movement.
In order to guide the ascending and descending series of steps in the desired
path relatively to each other, there are on one of the shafts loose guiding levers which
are connected to the frames.
Thus the device may consist of a series of bars with inclined or arc-like pro-
jections or covers in which or between which are openings, and which move up and
down in any curved or straight direction sin such manner that the transverse
walls preventing the gliding down of material on the steps of the grate alternately
descend and thus present the cavities of the rising bars in the direction of the
discharge.
Dated this 11th date of "Santana 1904
BOULT & WADE,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Separators for Granular or like
Material.
I, WILHELM SELTNER, Engineer,-of-Schlan, Bohemia in the Empire of Austro-
Hungary, 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:
This invention relates to separators for granular or similar materials: Apparatus
constructed according to this invention is chiefly adapted to be used in the dressing
of ore, coal and similar substances, and serves for separating small-sized pieces
from larger pieces.
In the accompanying drawings,
Figure 1 is a section of some of the bars forming the grating hereinafter
referred to.
Figure 2 is a longitudinal section, and
Figure 3 a plan of a complete separator, and
Figure 4 a view similar to Figure 1 illustrating an alternative arrangement.
With reference first to Figures, 12 and 3 the apparatus comprises a series of
transverse bars a having inclined projections thereon in the form of vertical webs a
between which are openings of any desired shape and size one set of alternate
transverse bars comprising the first, third, fifth; etc., being secured to one pair
of longitudinals d d'hereinafter termed the frame d; and the other set of alternate
bars second, fourth, sixth, etc., being secured to a second pair of longitudinal
bars hereinafter termed the frame d.
A motion is given to both frames such that the set of bars supported by one
frame rises whilst the set of bars secured to the other frame descends and vice versu
so that the alternate ascent and descent to the bars provides transverse furrows
or channels into which smaller pieces of the material under treatinent can fall.
Over these bars, producing by their up and down motion the furrows aforesaid,
the coarser material travels and is discharged at the lower end of the apparatus
the finer pieces falling through the openings b.
The travel of the material is effected by raising the material when one set of bars
rises, and, as soon as the other bars, moving downwards, come to lie lower than the
first ones the material' falls down on to these next lower bars.
This movement is repeated, the lower set of bars rising while the higher set

page_text: descends so that the material raised again falls down to the bars next below and
so on.
The alternating high and low positions of the sets of bars are shown in dotted.
lines in Figure 1.
When the material treated contains very large pieces which rest simultaneously
on three or more bars special transport devices may be combined with this separator
which devices will help to move the large pieces along the grating constituted
by the bars a and projections a¹.
Such a transport device is represented in Figure 4. It may consist simply
of cylindrical rotatable rods s which are arranged over alternate steps or bars b
which rods being able to rotate allow the larger pieces to move on.
It is not necessary that both sets of bars (Fig. 4) should reciprocate vertically;
one set comprising the bars marked may be stationary. The second set com-
posed of bars then reciprocates vertically the highest position of the latter being
indicated by dotted lines while its lowest position is represented in full lines.
The movement of the sets of bars can be effected in many different ways, a
simple way being illustrated in Figs. 2 and 3 in which bell crank levers m keyed
to a shaft and supporting the upper ends of both frames are rocked by means of
one or more connecting rods w from a crank or eccentric shaft ». In a similar
manner a rocking movement is communicated to other bell-crank levers r keyed
on a shaft 7 at the other end of the grating by means of levers and connecting
rods P, and these bell crank levers r operate the lower ends of the frame.
These bell crank levers thus communicate to the frames and therefore to the
series of bars the before mentioned up and down motion."
In order to guide the ascending and descending sets of bars in the desired path
relatively to each other there may be provided on one of the shafts loose guiding
levers which are connected to the frames d'.
Thus the separator may consist of a series of bars with inclined projections or
vertical webs in which or between which are openings the bars moving up and
down in a curved or straight direction in such manner that the rear wall prevents
the sliding down of material over the bars of the grating the bars alternately rising
and descending and thus forming cavities in the direction of the discharge.
Having now particularly described and ascertained the nature of the said in-
vention and in what manner the same is to be performed I declare that what I
claim is:-
1. Separating apparatus for granular or similar material comprising two sets of
bars such as a with openings such as between them and means for moving one or
both sets substantially in the manner and for the purpose described.
2. In separating-apparatus of the kind described the combination with bars
such as a of rods such as s or equivalent apparatus to facilitate the travel of the
material treated substantially as described.
3. The combination and arrangement of parts constituting the complete separat-
ing apparatus for granular or similar material substantially as described and
illustrated in the accompanying drawings.
Dated this 12th day of July 1807
BOULT & WADE,
Agents for the Applicant.