Improvements in Apparatus for Separating Magnetic Ore from Sand.
Year: 1891

page_text: Date of Application, 24th Nov., 1891
Complete Specification Left, 18th May, 1892-Accepted, 18th June, 1892
PROVISIONAL SPECIFICATION.
}
Improvements in Apparatus for Separating Magnetic Ore from
Sand.
We, FRANCIS JAMES BELL of 13 High Street, Kingston on Thames in the
County of Surrey, Solicitor and WALTER BASSETT BASSET of No. 110 West-
minster Bridge Road in the County of Surrey, Engineer, do hereby declare the
nature of this invention to be as follows :-
:-
Our invention relates to apparatus for separating the granular magnetic ore from
the sand with which it is usually found mixed. For this purpose we cause the
mixed ore and sand in a wet or dry condition to stream over the periphery of a
revolving drum (either in a vessel of water or not) presenting the polar ends of a
number of electro-magnets. Each of these magnets has its coil connected to
segments of a commutator which revolves with the drum and has bearing on it a
pair of brushes connected to. the terminals of a voltaic battery, dynamo electric
machine or other source of electricity. These brushes are so arranged relatively
to the commutator segments and the coils connected to them that, during the revo-
lution of the drum, the electro-magnets on the one side where the mixed ore and
sand streams on them, are excited attracting the magnetic granules and causing
them to adhere to the periphery of the drum, while the non magnetic sand falls
away, and that, on the other side, the magnets are rendered inert, allowing the
magnetic granules to fall away into a receptacle in which they are thus collected
separate from the sand.
Dated this 24th day of November 1801
ABEL & IMRAY,
Agents for the Applicants..
COMPLETE SPECIFICATION.
'Improvements in Apparatus for Separating Magnetic Ore from
Sand.
We, FRANCIS JAMES BELL of 13 High Street, Kingston on Thames in the
County of Surrey, Solicitor, and WALTER BASSETT BASSET of 110 West-
minster Bridge Road in the County of Surrey, Engineer, 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 apparatus for separating the granular magnetic ore
from the sand with which it is usually found mixed. For this purpose the mixed
ore and sand in a wet or dry condition is caused to stream over the periphery of a
revolving drum presenting the polar ends of a number of electromagnets. Each
of these magnets has its coil connected to seginents of a cominutator which revolves
with the drum and has bearing on it a pair of brushes connected to the terminals
of a voltaic battery, dynamo electric machine or other source of electricity. These
brushes are so arranged relatively to the commutator segments and the coils con-
nected to them that during the revolution of the drum, the electromagnets on the
one side where the mixture of ore and sand streams on them, are excited attracting
the magnetic granules and causing them to adhere to the periphery of the drum
while the non magnetic sand falls away and that, on the other side, the inagnets
are rendered inert allowing the magnetic granules to fall away into a receptacle
in which they are thus collected separate from the sand. The vessel in which the
drum revolves may be supplied with water introduced along with the ore.

page_text: Fig. 1 of the accompanying, drawing is a vertical section and Fig. 2 is a front
view of apparatus according to this invention.
At
A is a vessel supported on any convenient frame X and provided at the top with
a hopper L and valve for supplying ore to be treated with or without water.
the bottom the vessel A is provided with two hopper shaped outlets also furnished
with valves, the one ontlet K' arranged near the side where the feed hopper L is
situated the other outlet K* being near the other side. On a central shaft S which
passes through stuffing boxes at the sides of the vessel A and which is caused to
revolve slowly by any suitable motor is fixed a drum containing a number of
electromagnets B with their coils C of insulated wire, arranged uniformly around
the drum, the cores of the magnets presenting their ends or pole pieces attached to
their ends at the periphery of the drum. On the shaft S is fixed a commutator E
having as many segments as there are magnets, the coil of each magnet being con-
nected to one of these segments, on which bears a brush or set of brushes so
arranged in connection with suitable conductors that the coils of all the magnets
which during the revolution of the drum are passing through the region of the
vessel A under the feed hopper and over the discharge hopper K₁ are for the time
in closed circuit with a source of electricity, and that the coils of magnets which
are passing through the opposite region of the vessel A. have their circuits opened.
Thus, while the ore descends from L towards Kits magnetic particles are attracted
by and adhere to the magnets while its non magnetic ingredients descend into K¹
and pass away, but the magnetic particles on being carried round to the other side
of the vessel are released by the cessation of the magnetism and descend into K2
to pass away separately from the non magnetic ingredients.
Having now particularly described and ascertained the nature of this inven
tion, and in what manner the same is to be performed, we declare that what we
claim is
Apparatus for separating magnetic ore from sand consisting of a set of electro-
magnets arranged in a revolving drum in combination with a commutator, constructed
and operating substantially as described.
Dated this 18th day of May 1892
ABEL & IMRAY,
Agents for the Applicants.