A New or Improved Magnetic Separator.
Year: 1889

page_text: Date of Application, 10th Sept., 1889-Accepted, 12th Oct., 1889
COMPLETE SPECIFICATION.
A New or Improved Magnetic Separator.
I HERBERT JOHN HADDAN of the firm of Herbert & Co., Patent Agents of 18
Buckingham Street Strand W.C. in the County of Middlesex, Civil Engineer do
hereby declare the nature of this invention a communication to me from abroad by
Gurdon Conkling of Glens Falls, in the State of New York, United States of America
Manufacturer 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 eleminate and collect the magnetic particles
contained in and carried by a moving mass of crushed ore. The apparatus which
is used for this purpose and which forms the subject matter of this present inven-
tion is described in the following specification and illustrated in the accompanying
drawing in which
Fig. 5 Is a side elevation. of one of the rollers detached.
Similar letters indicate corresponding parts.
In this drawing the letter A designates an endless belt which extends round
two pulleys B B' and which is provided with raised rims or ribs a a at its edges. The
shafts C of the pulleys B B are mounted in a frame D which is inclined and the
inclination of which can be adjusted by any suitable means such for instance as those
shown in the drawing.
E is a trough which is placed over the belt A in an inclined position and over which
a mass of crushed ore containing magnetic particles is conducted to the endless belt A.
In the interior of said endless belt are situated one or more magnets F which are
secured to the frame D so that when the inclination of this frame is changed, the
magnets will retain their relative position towards the belt A. These magnets may
be made in the form of permanent inagnets or in the form of soft iron bars which are
rendered magnetic by electro magnets G. G. G. as indicated in the drawing.
The trough E is connected at or near its upper end by means of hinge joints e to a
frame H and from this frame extends a rod I which is connected to the trough at one
end by a hinge joint f while its opposite end is slotted to receive a set screw g. By
means of this bar and set screw the inclination of the trough can be adjusted.
Beneath the endless apron A is situated a brush or scraper N which is mounted on
a shaft i to which a revolving motion is imparted from the shaft C by means of a
belt (Fig. 2). Motion is imparted to the belt A so that it moves in the direction of
arrow 1. (Fig. 1). The mass of crushed ore which carries the magnetic particles
strikes the belt at a point over the magnets F and the magnetic particles contained in
said mass are attracted to the belt A by the magnets and are carried upwards while
that portion which contains the non magnetic particles is carried downward over the
belt and discharges into a vat K. The magnetic particles which adhere to the belt A
are separated from the same either by their own gravity or by the brush N and they
are collected in the vat L.
In order to ensure the action above stated it is necessary that the magnets F are
placed close beneath the upper strand of the belt A and that they extend in the .
direction of said belt up to the highest point of said upper strand.
The pulley B may be provided with grooves bb (Fig. 3) into which the ends of
the magnets F extend so that the magnetic particles which are attracted to the belt
by said magnets, will not be liable to become detached before they have been carried
by said belt over the highest portion of the pulley B or so that if the magnetic
particles have a tendency to accumulate on the belt at the end of the magnetic bars
the bars may be carried so far around the pulley as to cause such accumulation to
make no serious difficulty as gravitation would help to overcome the magnetic force.

page_text: A spray of clean water is introduced by means of the pipe S so that the dust
adhering to the magnetic particles which are attracted by the magnets and carried
upward by the belt will be washed away and since this dust contains chiefly such
impurities which when not removed render the result unfit for manufacture of steel,
this washing process is of great importance.
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:―
1. The combination in a magnetic separator of an endless belt A, a magnet F
situated within said belt close to its upper strand and extending in the direction of
the belt up to the highest point of said upper strand or nearly so, a frame con-
structed to retain said belt and magnet, in an inclined position and a trough situated
above the belt and the magnet substantially as described.
2. The combination in a magnetic separator of a frame hinged at one end and
movable into different positions to vary its angle of inclination, an endless belt
supported and retained by said frame, a magnet located within said belt and secured
to and movable with the frame whereby the magnet preserves its position, relative
to the belt when the inclination of the frame is changed, means for adjusting and
holding the belt and magnet carrying frame, and a trough arranged over said
frame to deposit the mass to be separated on the belt over the magnet, substantially
as described.
3. The combination in a magnetic separator of an inclined frame having two
opposite rollers one of which is provided with annular grooves in its external surface,
the endless belt passing round the pulleys and the magnets supported by the
frame within the belt and made to extend into said annular grooves substantially
as described.
4. The combination in a magnetic separator of an endless belt A, a magnet
situated within said belt close to its upper strand and extending in the direction
of the belt, a frame constructed to retain said belt and magnet in an inclined
position, a trough situated above the belt and the magnet and a spray pipe S
extended across the highest portion of the belt, substantially as described.
Dated this 10th day of September 1889.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.