Improvements in Apparatus for Separating Crushed Pyrites and similar Heavy Substances containing Gold or other Metal.
Year: 1891

page_text: Date of Application, 14th Nov., 1891
Complete Specification Left, 5th Aug., 1892-Accepted, 10th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Separating Crushed Pyrites and
similar Heavy Substances containing Gold or other Metal.
I, WILLIAM SCOULAR, of Johannesburg, in the South African Republic,
Millwright, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved concentrator or apparatus which has been
devised for the purpose of providing more efficient and economical means for
separating pyrites and other heavy substances containing gold or other metal from
crushed ores or compounds containing the same.
In carrying out my invention, I employ a table suspended at the four corners
from a suitable framing and having a to-and-fro percussive motion imparted to it
by means of a triple cam, a spring and a stop-piece. The triple cam is mounted on
the same shait as the driving wheel. The bearing-piece for the arms of the triple
cam is fitted adjustably on the table. The latter is linked to the free end of the
spring. It is preferably suspended by means of flat strips of metal, but wire ropes
or chains might be employed. Each strip, rope or chain is furnished with an
adjusting screw at the upper end. By turning the adjusting screws, the inclination
of the table can be altered as desired. Instead of a triple cam, a double or single
cam may be employed; the particular cam used merely depending on the speed at
which the driving shaft rotates.
The table, after being pushed back and then released by the cam, is forced
forward until the stop-piece strikes the framework; the sudden knock, aided by a
flow of water, causing the heavy and light particles to separate.
The floor of the table is so formed that the heavy particles are discharged from a
chute at the side of the table, while the light sand and the water are discharged
from a lower chute. The concentrating compartment on the table is of peculiar
shape; the floor or bottom being of uneven surface for the greater part of its
extent, sloping down from the outer edge as well as from the back, and leaving a
triangular depression diagonally across the table, which depression rises toward the
chute whence the heavier particles are discharged. The back of the table is
oblique. The depression is gradually narrowed toward the discharge chute for the
heavier particles above mentioned, while it is broadened toward the lower end
where the chute for the lighter particles and waste is situated.
Dated this 14th day of November 1891.
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Chartered Patent Agent.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Separating Crushed Pyrites and
similar Heavy Substances containing Gold or other Metal.
I, WILLIAM SCOULAR, of Johannesburg, in the South African Republic,
Millwright, 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 an improved concentrator or apparatus which has been
devised for the purpose of providing more efficient and economical means for
separating pyrites and similar heavy substances containing gold or other metal from
crushed ores or compounds containing the same.

page_text: The way in which I prefer to carry out my invention is shewn in the accompanying
drawings, whereof
Fig. 1 is a plan, Fig. 2 a front elevation, and Fig. 3 a side elevation.
Figs. 4, 5, 6 and 7 are respectively sections through the table on the lines 4-4,
5-5, 6-6 and 7-7 in Fig. 1.
A is a table suspended at the four corners by metal straps B from uprights c on a
suitable framing C, and having a to-and-fro percussive motion imparted to it by
means of a triple cam D D D², a spring E and a stop-piece A'. The triple cam
and the driving wheel G are mounted on the shaft H. The bearing-piece K for the
arms D, D' and D2 of the triple cam D D' D2 is fitted adjustably on a backward
prolongation of the stop-piece A¹. The latter is connected by a link L to the free
end e of the spring E. It is preferably suspended by means of the flat straps of
metal B, but wire ropes or chains may be employed. Each strap, rope or chain is
furnished with an adjusting screw B₁ at the upper end. By turning the nuts
pertaining to the adjusting screws B', the inclination of the table can be altered as
desired. Instead of the triple cam D D¹ D², a double or single cam may be
employed; the particular cam used merely depending on the speed at which the
driving shaft H rotates.
The table A, after being pushed back and then released by the cam D D' D², is
forced forward by the spring E until the stop-piece A' strikes the framework C;
the sudden knock, aided by a flow of water, causing the heavy and light particles
to separate.
The floor of the table is so formed that the heavy particles are discharged into a
chute from an outlet a at the side of the table, while the light sand and the water
are discharged into a lower chute from an outlet a¹. The concentrating com-
partment a² on the table is of peculiar shape; the floor or bottom being of uneven
surface (as most clearly seen in Figs. 4 to 7) for the greater part of its extent,
sloping down from the outer edge as well as the back, and leaving a triangular
depression diagonally across the table, which depression rises toward the outlet a
whence the heavier particles are discharged. The back a³ of the table is oblique.
The depression is gradually narrowed toward the outlet a, while it is broadened
toward the outlet a¹. M is a water-spray apparatus, and N the chute for the
crushed ore or compound containing the pyrites or other heavy substance to be
separated.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I claim :-
1. The improved apparatus for separating crushed pyrites and similar heavy
substances containing gold or other metal, constructed or operating substantially as
described with reference to the accompanying drawings.
2. The improved apparatus for separating crushed pyrites and similar heavy
substances containing gold or other metal, arranged substantially as herein
described, and comprising a table A fitted with a stop-piece A' and having an
outlet a for the heavy particles, an outlet a¹ for the light particles and water, both
outlets leading from the triangular concentrating compartment a², the back a³ of the
table being oblique.
3. The combination, with the table A having a stop-piece A', outlets a and a¹,
a concentrating compartment a² and an oblique back a³, of the spring E, the
cam D D1 D2 and the framework C, substantially as and for the purpose set
forth.
1 1
1000
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Chartered Patent Agent.