Improvements in Apparatus for Concentrating Gold Ores and the like.
Year: 1892

page_text: Date of Application, 16th Sept., 1892
Complete Specification Left, 23rd May, 1893-Accepted, 16th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Concentrating Gold Ores and
the like.
I ROBERT HARRY GREY of 3 Mill Hill Grove Acton in the County of
Middlesex, Manufacturer do hereby declare the nature of this invention which has
been communicated to me from abroad by Frederick William Grey and
Walter Marsh both of Orrgaum Southern India Mining Engineers, to be as
follows:
The object of this invention is to provide apparatus whereby the concentration of
gold ores or the like is effected in a more efficient and ready manner than hitherto.
According to this invention the concentrator is provided with an outlet which is
adjustable relatively to the inlet and also with means whereby the capacity or area
of the passage through which the ore being concentrated passes, can be varied.
It is preferred to construct the concentrator as follows; but I do not limit myself
to the precise details which I shall describe. The concentrator consists of a vessel
preferably of an inverted conical or pyramidal form within which is placed a box
or the like preferably of corresponding form so as to leave a space between itself
and the interior of the said vessel. This space is preferably made adjustable to
suit different classes of ore to be treated and this adjustment can be conveniently
effected by securing to the said box or the like a screw which passes through a
screw nut or through screw nuts supported by a saddle-piece bridging the said
vessel so that by means of the said screw and nut or nuts the box or the like can
be raised and lowered in the said vessel to enlarge or contract the aforesaid space.
The ore to be treated and mixed with the necessary amount of water is introduced
at one end of the said space and passes down therethrough and up towards the
outlet which is made adjustable relatively to the inlet. This adjustment is con-
veniently effected by making the upper part of the vessel or the outlet lip or spout
thereof capable of sliding up and down upon the said vessel and operating it by
means of a screw secured thereto and passed through a screw nut or nuts carried
by a saddle piece secured to the said vessel. Water under pressure is admitted
to the said space preferably from the bottom portion thereof through a suitable
pipe or pipes.
Dated this 16th day of September 1892
J. H. JOHNSON & CO.,
47, Lincoln's Inn Fields, London.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Concentrating Gold Ores and
the like.
I ROBERT HARRY GREY of 3 Mill Hill Grove Acton in the County of
Middlesex Manufacturer do hereby declare the nature of this invention (which
has been communicated to me from abroad by Frederick William Grey and
Walter Marsh both of Orrgaum Southern India Mining Engineers) 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 this invention is to provide apparatus whereby the concentration
of gold ores, or the like, is effected in a more efficient and ready manner than
hitherto. According to this invention the concentrator is provided with an outlet
which is adjustable relatively to the inlet; and also with means whereby the

page_text: capacity, or area, of the passage, through which the ore being concentrated
passes, can be varied. It is preferred to construct the concentrator as follows and
as illustrated in vertical section in Figure 1 and in plan in Figure 2 of the accom-
panying drawing but I do not limit myself to the precise details which I shall
describe in connection therewith. The concentrator consists of a vessel A, pre-
ferably of an inverted conical or pyramidal form, and provided with supports or
feet a by which it can be secured in position, within which vessel A is placed a
box B, or the like, preferably of corresponding form, so as to leave a space C
between itself and the interior of the said vessel A. This space C is preferably
made adjustable to suit different classes of ore to be treated, and this adjustment
can be conveniently effected by securing to the cross bar 6 fixed to the said box,
or the like, a screw D which can rotate in the said bar and passes through a screw
nut, or through screw nuts (one of which may be a lock nut) supported by a saddle-
piece a bridging the said vessel A so that by means of the said screw and nut, or
nuts, the box, or the like, can be raised and lowered in the said vessel to enlarge,
or contract, the aforesaid space. d is a hand wheel for operating the said screw
and a bare guides on the vessel A and box B respectively to guide the box B in
its movement and retain it in position. The ore to be treated, and mixed with the
necessary amount of water, is introduced at one end of the said space C as indicated
by the arrow and passes down therethrough and up towards the outlet which is
made adjustable relatively to the inlet. This adjustment is conveniently effected
by making the upper part of the vessel A or the outlet lip or spout A2 thereof as
shewn capable of sliding up and down in guides a upon the said vessel A and
operating it by means of a screw E screwed thereto so that it can revolve therein
and passed through a screw nut or nuts (one of which may be a lock nut) carried
by a saddle-piece a secured to the said vessel A. Water under pressure is
admitted to the said space C preferably from the bottom portion thereof through
a suitable pipe or pipes as shewn at F the said pipe having a hinged or jointed
outlet F2 and valve for the concentrated material.
The material to be concentrated is mixed with water and is fed into the space C
as shewn by the arrow and is there met by an upward current of water supplied
by the pipe F the heavier particles descending and being discharged through the
pipe F F and valve whilst the light particles or slimes pass over the adjustable
outlet, lip or spout A2 and if further concentration be desired, the said light
particles or slimes can be fed into another apparatus of a like kind.
By means of the adjustable space C and the adjustable outlet the apparatus can
be adjusted to efficiently concentrate every class of ore as with a constant head of
water the rapidity of the current through the space C can be increased by lowering
the box B and the quality of the tailings can be determined by means of the
adjustable outlet at the upper part of the vessel A and the quality of the
concentrates can be determined by means of the adjustable outlet F³.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In apparatus for concentrating gold ores or the like an adjustable outlet
arranged to regulate the quality of the tailings or slimes substantially as hereinbefore
described.
2. In apparatus for concentrating gold ores or the like a vessel such as A with
a box or body such as B adjustable so as to regulate the space between the said
vessel and box or body and the rate at which the material under operation passes
through the said space substantially as herein before described.
3. In apparatus for concentrating gold ores or the like the combination of a
vessel such as A with an adjustable outlet and an inlet for water under pressure
at its lower part and with a box or body such as B adjustable to regulate the space
between the said vessel and box or body and the rate at which the material under
operation passes through the said space substantially as hereinbefore described.

page_text: 4. The arrangement and combination of parts constituting an apparatus for
concentrating gold ores or the like substantially as hereinbefore described and
shewn in the accompanying drawings.
Dated thin 22nd day of Man 1902
J. H. JOHNSON & Co.,
Agents.