IMPROVED APPARATUS FOR SCREENING OR SORTING PULVERULENT OR GRANULAR MATERIALS to be as follows:
Year: 1884

page_text: 1, CARL SCHLICKEYSEN of Berlin, Prussia, Germany, Engineer do hereby declare
the nature of my invention for "IMPROVED APPARATUS FOR SCREENING OR SORTING
PULVERULENT OR GRANULAR MATERIALS to be as follows:-
"
According to this invention, an inclined screen or sieve for separating or sorting
granular or pulverulent materials, is supported upon an axis or fulcrum in such a
manner that when the material to be screened is delivered periodically thereon, the
screen is caused, firstly, by the impetus of the material, to descend a certain
distance until it comes in contact with a stop, so that the shock imparted to the
screen by such impact will assist in causing the small particles of the material to
pass through the meshes thereof, and will also facilitate the passing of the larger
particles along the upper surface of the screen; and secondly, the screen is made to
rise again after the shock of the downward blow and in. again striking against a
second stop, it is caused by such second stop to still further facilitate the passage
of the material of the material through and from off it.
The invention is capable of being carried into effect in various ways; thus,
according to one arrangement, the screen is mounted on an axis or on pivots at or
near its middle, the lower part being made to somewhat overbalance the upper
part, so that the latter is kept up against a stop above it or the former is kept
against a stop below it. Or the axis or fulcrum of the screen may be at or near
one end thereof and the other end be kept in a raised position against a stop by a
weighted arm extended beyond the axis or by a spring. In either case, on throwing
the material to be screened upon the upper end of the screen, this is brought down
forcibly against a stop and the force of the impetus being thus neutralised, the
screen is caused by the preponderating weight at the other end, to rise and strike
forcibly against the upper stop. Two or more screens of different fineness, having
the above described action, may be arranged one above the other in a casing, so as
to sort the material into corresponding degrees of fineness, and one or more of them
may be moved mechanically by a lever, cam or cord, so as to produce a continuous
up and down motion against the stops, independently of the impetus of the falling
material, when this descends in a more or less continuous stream. In order to
increase the impetus of the falling material, the upper end of the screen may be
widened, so as to offer extended surface, or it may be there provided with a solid
Die

page_text: surface on which the material partly falls. A fixed grating or screen with wido
bars or large meshes may be arranged over the moveable screens, so that the
material, on being thrown thereon, becomes distributed over a greater area before
falling on to the moveable screens.
For this
When the above described improved construction of screens is employed for
screening large masses of sand, gravel and the like, it may, in many cases, be more
convenient to move the screen to the heap of material than the converse.
purpose, the screen is mounted on a framing running on wheels, or capable of
being slid along by the side of an endless travelling band or apron, the delivery
shoot of the screen being so arranged that, in whatever position it is moved into, it
will deliver the screened material on to the apron, which, in its turn, carries it
either into a receptacle, or in to the buckets of an elevator.
Dated this 7th day of January 1884.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.

page_text: I, CARL SCHLICKEYSEN of Berlin, Prussia, Germany, Engineer, do hereby declare
the nature of my said invention for "IMPROVED APPARATUS FOR SCREENING OR
SORTING PULVERULENT OR GRANULAR MATERIALS "
and in what manner the same
is to be performed to be particularly described and ascertained in and by the
following statement:―
According to this invention an inclined screen or sieve for separating or sorting
granular or pulverulent materials, is supported upon an axis or fulcrum in such a
manner that when the material to be screened is delivered periodically thereon, the
screen is caused firstly, by the impetus of the material, to descend a certain
distance until it comes in contact with a stop, so that the shock imparted to the
screen by such impact will assist in causing the small particles of the material to
pass through the meshes thereof, and will also facilitate the passing of the larger
particles along the upper surface of the screen; and secondly, the screen is made to
rise again after the shock of the downward blow, and in again striking against a
second stop, it is caused by such second stop still further to facilitate the passage of
the material through and from off it.
The invention is capable of being carried into effect in various ways; thus,
according to one arrangement, the screen is mounted on an axis or on pivots at or
near its middle, the lower part being made to somewhat overbalance the upper part,
so that the latter is kept against a stop below it. Or the axis or fulcrum of the
screen may be at or near one end thereof and the other end be kept in a raised
position against a stop by a weighted arm extended beyond the axis or by a spring,
In either case, on throwing the inaterial to be screened upon the upper end of the
screen, this is brought down forcibly against a stop and the force of the impetus
being thus neutralised the screen is caused by the preponderating weight at the
other end, to rise and strike forcibly against the upper stop.
The accompanying drawings shew various arrangements of the above described
improved construction of screens, similar letters of reference indicating similar
parts in each of the figures. Each of the screens C, of which there may be one as
in fig. 5 or two as in others of the figures, is mounted on an axis C¹ or on
trunnions C¹ C¹ carried in bearings on each side of the frame or carriage B, the
screen being free to oscillate on such axis but having its motion limited by
the stops B and B2. At the lower end of the screen is a weighted rod C² by
means of which this end is drawn downwards, so that the upper end is held
suspended in a raised position.
If now a quantity of sand, coals or other material is thrown on to this suspended
screen surface, the impetus will cause it to descend suddenly with a blow against
the upper stop B¹ whereby a large part of the fine materials thrown on will be
caused to pass through. The weighted rod C2 will then at once draw the lower end
of the screen down with a blow against the lower stop B2 thereby producing such
a concussion of the screen as to cause the remaining portion of fine materials to
pass through the meshes, while the coarse particles pass down the upper surface
and are discharged by the shoot B*.
In order to effectually distribute wet material as it passes on to the screen C and
thus prevent its meshes from becoming clogged as also to protect it from injury by
large stones or lumps of material, a coarse screen or grating Z with stout bars may
be arranged above the screen C, to receive the material which is thrown on to Z in
the first instance. By thus affording the screen C an automatic oscillating action,

page_text: the application of special power for imparting a continuous motion thereto, such as
is now frequently employed is avoided, the impetus of the falling mass affording
the requisite power; also the concussions produce a motion which is directly
contrary to the momentary movement of the material being screened and thus the
screening operation is much more facilitated than is the case where regular
periodical movements, independent of the motion of the material, are imparted to
the screen.
It will be readily understood that the axis on which the screen oscillates need
not necessarily be horizontal as shewn; it can be placed in any other position,
above, below or in the plane of the screen at or near its middle, the one half of the
screen being slightly over-weighted so as to be kept against a stop, while the
material is thrown upon the other half. It is also not necessary that the axis
should be near the middle; it may be arranged more or less near to or even at or
beyond the one end thereof.
The balance weight C2 for keeping the screen in the raised position must then
be carried by an arm or lever projecting a sufficient distance beyond the axis, as
shewn, for instance at fig 4, where the axis of the upper screen is situated at the
lower end thereof while that of the lower fine screen is situated at the upper end.
The screens may also be arranged to strike against stops B5 situated above them,
in order to produce the required concussions.
The upper end of the screen may be advantageously widened somewhat or it is
provided with a sheet metal extension B6, so that the concussive effect may be
increased by the material falling upon such surface before sliding on to the screening
surface.
In cases where the materials fall continuously on to the raised end of the screen,
it is necessary to produce the before described up and down motion and concussions
irrespective of the action of the material, by means either of a cord, lever or
cam F (fig. 3), which is made to depress the upper end, and in then leaving it free,
allows it to be raised with a jerk against the stop by the action of the weighted
lower end.
In order to obviate the difficulty now existing in having to bring large masses
of sand and other materials to the place where the screening apparatus is situated,
the framing of the screen may be mounted on wheels D, as shewn in figs. 1, 2
and 6, and below the shoot of the screen, between the wheels, may be arranged an
endless travelling apron E stretched over two rollers F, so that the screened
material, in falling from the shoot on to the apron, may be carried thereby to the
chain buckets G. The travelling apron together with the rails H for the carriage
may be arranged to extend any required distance along the face of the heaps of
material to be screened, so that the screening apparatus can be moved to any
desired part of the latter; the carriage may be arranged either to run upon wheels
as shewn or to slide upon the rails.
The framing may be of simple tripod construction, capable of being folded up, as
in figs. 5, 7, 8 and 9 with wheels as in figs. 7 and 9.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1, Mounting an inclined screen upon an axis or on trunnions in such manner
that the screen, being free to oscillate between stops that limit its motion, but
being kept up against the one stop by preponderating weight, so that on receiving
an impulse it is subjected to concussions against the stops, substantially as and for
the purpose herein described.
2, In screens constructed and operating as set forth in the preceding claim,
loading the one end of the screen with a weight C2, whereby such end is held down,
causing the other end to be suspended in a raised position, so that on throwing the
material to be screened, upon such raised end, this is moved downwards against the
stop B¹ producing a concussion that facilitates the passage of the material through

page_text: the screen, whereupon the weight C2 at the other end immediately draws this down
again until it comes in contact with a second stop, producing a second concussion,
substantially as herein described.
3, In screens constructed and operating as set forth in the preceding claims,
constructing the end of the screen on which the material falls, of increased width,
or providing it with a sheet metal extension such as B, thus affording an increased
unperforated surface for receiving the blow of the material and producing an
increased concussion on coming in contact with the stop, substantially as herein
described.
4, In screens constructed and operating as set forth in the preceding claims,
imparting the one movement to the screen by means of a cam I or by a lever or
cord, the return movement being effected by the preponderating weight of the one
end, whereby a series of concussions are imparted to the screen while the material
to be screened is fed continuously thereon.
Dated thio 92nd dag of Cantamhan 1001
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.