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Патент USA US2119185

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May 31, 1938-
R. o. STOKES EH1
7
2,119,185
APPARATUS FOR SEPARATION OF MINERALS
Filed Deq. 26, 1955
V4%é/MWM
2,119,185
Patented May 31, 1938
lJNlTED STATES
PATENT OFlFliZE
2,119,185
APPARATUS FOR SEPARATION OF
MINERALS
Rupert Octavius Stokes and John Caldwell Allan,
London, England
Application December 26, 1935, Serial No. 56,298
In Great Britain December 29, 1934
1 Claim. (Cl. 209-427)
The invention relates to apparatus for the
separation or classi?cation of minerals of the type
in which the material to be classi?ed or separated
is supported on a perforated tray immersed in
5 water and in which there is relative movement be
tween the water and the tray.
In a jigging screen such as the Hancock, a per
at the lower edges of the side walls of the table 5
and are held down against them by boards 63 one
on each side with wedges 42 under ?anges 43 at
the top of the table sides.
A chute 44 serves for the supply of raw ma
terial and make-up water.
Under the in?uence
of the table movement the material moves from
forated screen is provided with upright dividing
left to right in Figure l and heaps up against
walls which divide it up into compartments or
the rear wall of. the boxes 38 of the next com
boxes with perforated bottoms, and ragging or
material of higher speci?c gravity and of a size
partments and against the end wall in the 10
last compartment. The upper, lighter material
(gangue) passes over to the next compartment
or over the end wall to the discharge spout 6,
whence it is taken to other parts of the plant
not concerned in the present invention.
15
slightly larger than the screen perforations is
?lled into these compartments. The invention
is directed to a particular form of screen allow
15 ing for easy removal and renewal of the perfo
According to the invention a
The heavier ore collects at the centre of the
table for separating or classifying minerals with
lower right hand end of each compartment and
means for reciprocating it in an up and down
direction in water comprises side walls and re
may be discharged continuously if the raw ma
terial has a fairly high ore content. If on the
other hand the ore content is low the discharge
may be intermittent to allow a reasonable quan
rated bottoms.
movable box-like structures with sloping perfo
rated tops and open bottoms in which adjustable
apertures are provided adjacent to the lower end
tity to accumulate between discharges.
of the sloping perforated part in communication
with the upper side of the said perforated part
and the under side of the adjacent perforated
In either case the gate shown in. Figure 4 is
used. A valve or slider 41 with an inverted
part.
verse wall of the adjacent compartment by a
strap 48 adjustable in height and is moved up
and down by a rod 49. The strap 48 is adjusted
by means of slotted bolt holes. It will be seen
that the discharge aperture 46 is in the form of
a trapezium of. adjustable width and height in
the transverse wall. A guide member 93 behind
An embodiment of the invention will now be
described in conjunction with the accompanying
drawing, in which
Figure 1 is a sectional elevation of the moving
table,
Figures 2 and 3 are sectional end elevations of
the same taken on the lines II——II and III—III
of Figure 1 respectively and looking in the direc
ticn of the arrows, and
Figure 4 is a fragmentary elevation of the dis
charge apertures and valves.
Referring to the drawing, a jig for ore con
centration is provided with known means: for re
40 ciprocating it in water, and is divided in the ex
ample shown into three compartments and in
each compartment the ?oor is made up of four
box-like structures 38 to 4| with sloping perfo
rated tops.
Of these 38 and 39 are of the same
45 height right across and 40 and 4! have in the
middle a gradually deepening channel to urge
the heavier material towards the centre, at which
position the discharge gate is mounted. The
boxes 38 to 4| are supported on inward ?anges
V-shaped notch in it is guided against the trans
25
the discharge aperture 46 localizes the discharge.
The cross-section of the path traversed by the
ore is, however, made greater than the largest
opening 46 of the valve 41.
What we claim is:
A table for separating or classifying minerals
with means for reciprocating it in an up and
down direction in water comprising side walls 40
and removable box-like structures with sloping
perforated tops and open bottoms in which ad
justable apertures are provided adjacent to the
lower end of the sloping perforated part in com
munication with the upper side of the said per 45
forated part and the under side of the adjacent
perforated part.
RUPERT OCTAVIUS STOKES.
JOHN CALDWELL ALLAN.
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