An Improved Magnetic Separator.
Year: 1890

page_text: Date of Application, 29th Jan., 1890
Complete Specification Left, 29th Oct., 1890-Accepted, 10th Jan., 1891
PROVISIONAL SPECIFICATION.
An Improved Magnetic Separator.
I, GEORGE WILLIAM ELLIOTT, 160 Shirebrook Road, Heeley, Sheffield, Mining
and Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to an improvod magnetic separator for picking out iron or
steel from other materials, whereby it is more effectually accomplished than by any
machine now in use.
For this purpose I fix one or more magnets, preferably four, on a cylinder of wood or
other non-magnetic material, with their ends passing through the sides to the inside,
and there secured to plates of iron which are inside the cylinder, and extend as near
each end as desirable, and separated from each other as far as necessary.
The cylinder is placed with its axis at a suitable inclination so that the material
which enters at one end may gradually be worked out at the other as the cylinder is
caused to revolve, or the cylinder may be made cone shaped, to answer the same
purpose.
As the cylinder revolves, the plates inside it, which are in contact with the magnets,
are brought, each in its turn, several times in contact with the material passing
through the cylinder, and the magnets are also brought, by means of brushes, bands
of copper & wires into connection with a dynamo, and powerfully magnetise until
they reach the top side of the cylinder during its revolutions, when each in its turn
is automatically disconnected from the dynamo, and instantly demagnetised, and the
iron or steel which may be adhering to the plate inside the cylinder is dropped or
brushed off into an inclined tray of copper, or other non-magnetic material, fixed
inside the cylinder but not revolving with it, down which it slides out of the cylinder
into a receptacle.
The tray may be magnetic or not, if the quantity to be picked out is not
great, and made to contain the iron or steel for some time and be emptied as
required.
Each magnet remains disconnected from the dynamo until it has passed the tray.
This arrangement causes the material to roll or slide over the magnetised p'ates
many times as the cylinder revolves, before it finally escapes from it so that a piece
of iron or steel has a very remote chance of escaping without being picked up by the
magnetised plates.
Datal this 50th day of Janu 1900
COMPLETE SPECIFICATION.
An Improved Magnetic Separator.
I, GEORGE WILLIAM ELLIOTT, of 160, Shirebrook Road, Heeley, Sheffield, 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 magnetic separator for picking out iron or
steel from other materials, whereby it is more effectually accomplished than by any
machine now in use.
For this purpose I fix one or more magnets, preferably four, on a cylinder of
wood, or other non-magnetic material with their ends passing through the sides to the
inside, an there secured to plates of iron which are inside the cylinder, and extend.
as near each end as desirable, and separated from each other as far as necessary.

page_text: The cylinder is placed with its axis at a suitable inclination so that the material
which enters at one end may gradually be worked out at the other as the cylinder
is caused to revolve, or the cylinder is made cone shaped, to answer the same
purpose.
As the cylinder revolves, the plates inside it, which are in contact with the
magnets, are brought, each in its turn, several times in contact with the material
passing through the cylinder, and the magnets are also brought by means of brushes,
bands of copper, and wires, into connection with a dynamo, and powerfully magnetised
until they reach the top side of the cylinder during its revolutions, when each in its
turn is automatically disconnected from the dynamo, and instantly demagnetised, and
the iron or steel which may be adhering to the plate inside the cylinder is dropped,
or brushed off into an inclined tray of copper or other non-magnetic material, fixed
inside the cylinder, but not revolving with it, down which the magnetic material slides
out of the cylinder into a receptacle.
The tray may in some cases be magnetic if the quantity to be picked out is not
great, and made to contain the iron or steel for some time and be emptied as
required.
Each magnet remains disconnected from the dynamo until it has passed the tray.
This arrangement causes the material to roll, or slide over the magnetised plates,
many times as the cylinder revolves before it finally escapes from it, so that a piece
of iron or steel has a very remote chance of escaping without being picked up by
the magnetised plates.
In order that my invention may be the better understood I now proceed to describe
the same in relation to the drawings hereunto annexed, reference being bad to the
letters and figures marked thereon.
Figure 1 is the cross section of a magnetic separator constructed according to my
invention and
Figure 2 is the longitudinal section of the same.
a is the drum or body of non-magnetic material such as wood.
C
bbare the magnets with magnet yokes carried and supported in the non-magnetic
framing, having polar plates or extensions d fixed thereon, and being magnetized,
or excited by means of an electric current in the coils e.
The space between
successive poles or pairs of poles, is filled up with brass, wood, or other non-magnetic
material, shewn at f
The whole drum is supported and revolved on the rollers g g by a driving rope or
band m.
The scoop, or shoot serves to remove the magnetic material, which is carried
round by the magnets and released by their demagnetization when at or near the
highest point of the rotation. The electric current is conveved into the wire coils of
the magnets by the insulated fixed metal ring and the travelling brushes 2;
the said ring, being broken, or removed at the upper part of the circumference,
where it is desired to demagnetize the magnets, as they successively pass the highest
point, causing the magnetic material to be released and dropped into the tray h. The
circuit of the magnets may be put to earth, or return current, by the revolving
metallic band p and a fixed brush q.
Having now particularly described and ascertained the nature of this said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1st. In a magnetic separator, a revolving chamber or drum carrying with it electro-
magnets on the internal surface, for the purpose of separating materials of different
magnetic susceptibilities, the material traversing the revolving drum during its
rotation, substantially as described.
2nd. In such a magnetic separator the arrangement of electro-magnets and
distributing contacts. to enable the magnets to be demagnetised during a portion of
the revolution to release or allow to be brushed off, the attracted magnetic material,
for collection in a suitable tray or shoot substantially as described..

page_text: 3rd. The arrangement and general combination of parts of a magnetic separator
substantially as described and illustrated in Figures 1 and 2.
DL 80th day of October 1890
FELL & WILDING,
1, Queen Victoria Street, E.C., Agents for the Applicant.