Improved Means of Separating Particles of Iron or of Magnetic Oxide of Iron from Admixture with other Substances.
Year: 1889

page_text: Date of Application, 16th Dec., 1889
Complete Specification Left, 28th Aug., 1890-Accepted, 11th Oct., 1890
PROVISIONAL SPECIFICATION.
Improved Means of Separating Particles of Iron or of Magnetic
Oxide of Iron from Admixture with other Substances.
I, JOSEPH HOBSON, Brass Founder of 12 Nursery Street Sheffield in the County of
York, do hereby declare the nature of this invention to be as follows:-
My invention consists essentially of a perforated inclined plane supported upon a
suitable stand or support and beneath the inclined plane a number of horse shoe or
bar magnets the poles of which project through the perforations in the inclined plane.
To this combination of an inclined plane and magnets a reciprocating motion in two
or more directions is given. At a convenient distance above the inclined plane is
placed a brush or a series of brushes which at suitable intervals of time are made
to sweep clean the magnets and the surface of the inclined plane. The required
motion of the inclined plane, magnets and brush or brushes is imparted by any of the
well known mechanical devices applicable for that purpose. At a convenient distance
above the apparatus described is placed a hopper or feed box from which the
substances to be separated fall upon the inclined plane and below the latter at
suitable distances I place receptacles for the separated substances.
Dated this 14th dose of December 1889
JOSEPH HOBSON.
COMPLETE SPECIFICATION.
Improved Means of Separating Particles of Iron or of Magnetic
Oxide of Iron from Admixture with other Substances.
JOSEPH HOBSON 12 Nursery Street, Sheffield Yorkshire, Brass Founder, 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:
"
My invention relates to that class of machines known as Magnetic Separators" in
which permanent, or electro magnets of horse shoe or other shape are employed to
separate particles of iron, steel and the like from other substances, or mixtures and
my improvements consist in the method of employing such magnets, in the special
arrangements for feeding the material to be separated, in the mechanical means
employed to assist the separation of the particles and cause them to adhere to the
magnets and of a means of removing such adhering particles from the magnets
automatically or otherwise as may be desired.
In order to carry out my invention I use a perforated inclined tray or trough made
preferably of brass or other non-magnetic material: through the bottom of this tray
the ends or poles of magnets slightly project and by means of suitable mechanism
1 cause the tray to receive either a longitudinal or transverse reciprocating and
rocking motion: above the top end of the tray I place a hopper having a
feed worm at its base, underneath this worm 1 place, or attach a nozzle,
delivery pipe, or spout arranged to rise and fall upon a fulcrum, this delivery pipe
receives a continuous feed from the hopper and when in a raised position retains its
charge of material but when lowered delivers it on to a distributing table attached to
the magnet tray, at the top end of this tray and under the distributing table a chamber
is formed terminating in a pipe near the ground for the discharge of the separated
iron or steel the distributing table is inclined and transversely curved so as to evenly
distribute the material and it is fitted with a "gate" or "sluice" to regulate the rate
of food on to the maonet trav.

page_text: For the purpose of rotating the feed worm, raising and lowering the delivery pipe,
imparting reciprocating motion to the table and when required working an automatic
brush motion ampley any ordinary gearing but by preference the form herein
described and illustrated by the accompanying drawings.
ay gearing out by preference the form nerein
described and illustrated by the accompanying drawings.
DESCRIPTION OF THE DRAWINGS.
Fig. 1, is an end view of the machine without the magnet tray.
Fig. 2, is a side elevation with the magnet tray.
Fig. 3, is a plan of the machine.
Fig. 4, is a cross section of the magnet tray on the line X X to an enlarged
scale.
Fig. 5, is a plan of the perforated magnet tray and magnets.
In Figs. 2, 3, 4 & 5 A, is the perforated magnet tray and B the magnets.
In Figs. 1, 2, & 3 C, is the feed hopper and D the feed worm: E is the driving
shaft and F the framing of the machine.
In Figs. 1 & 2, G, is the intermittent action delivery pipe or spout which is
sustained in position shown by full lines by the pawl H, when the said pawl is
pressed downwards by the revolving cam I, upon the wheel J, Fig. 1.
In Figs. 2 & 3 K is the distributing table and L the adjustable gate, or sluice,
to regulate and distribute the material over the magnets in the tray A. M is the
receiving chamber and outlet pipe for the iron and steel which has been collected by
the magnets, N is a brush which may be either worked by hand or by the levers 0,
to which motion may be given at the right moment by the action of the cam P, upon
the wheel J Fig. 1.
In. Figs. 1 & 2 Q is an eccentric for the purpose of imparting a backward and
forward motion to the distributing table K, and to the magnet tray A. R, R, are
the supports of the tray and form rockers giving the tray a slight upward &
downward movement.
The method of working my improved separating machine is as follows: The
mixed material or substance containing iron or steel is thrown into the hopper C,
from which it is continuously and regularly thrust out by the worm D: the spout G is
hinged and has a pawl H attached to it which comes into contact with the cam I at every
revolution of the wheel J, whilst in this position it receives a certain charge of
material from the worm D, and when the cam releases the pawl the spout falls
into the position shown by dotted lines, discharging its contents upon the distributing
table K this measured quantity of material then passes over the magnets in the
tray A which is being shaken by the eccentric Q, the iron adheres to the magnets
and the cleaned or separated material passes forwards by gravity and falls into a
suitable receptacle at S: the iron adhering to the magnets may now be swept up
the tray
into the chamber M, and down the tube into any receptacle at T, this may be done
either by working the brush by hand or automatically by the machine by means of
the cam P. and levers O, or by any equivalent arrangement thereto the dotted
line U on the drawing shows the position of the lever O, when it has been drawn-
over by the cam P, the brush N has then swept the magnets and delivered the
sweepings into the chamber M, when the cam releases the levers the brush returns to
the bottom of the tray and is ready for the next stroke: this completes the cycle and as
will be seen the spout G, has in the meantime been recharged by the worm so that
a continuous action of the machine is maintained.
:
I do not confine myself to the use of any particular form of perforated tray, or
arrangement of magnets, or of distributing table and spout, but may employ any
suitable forms or shapes of these in conjunction with any kind of ordinary glaring
to form a combination of intermittent feed, distributing table, adjustable gate,
inclined perforated magnet tray and either with or without the automatic brush
arrangement for the purpose of separating iron or steel and the like from brass
or other substances, or mixtures, either in a wet or dry state substantially in the
manner herein described and illustrated by the drawings.
.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what 1
claim is :-
1stly. The use of an improved inclined shaking or vibrating plate or tray perforated
to receive the poles of magnets.
2ndly. In combination with such plate or tray a distributing table and adjustable
gate affixed thereto.
3rdly. An intermittent feed action in conjunction with a distributing table and
magnet tray.
4thly. A method of cleaning the magnets by a brush worked automatically by
levers, cams, and gearing from the driving gear of the machine or from any
independent source.
5thly. In machines for separating iron and steel from foreign substances, the
combination of a continuous feed worm with an intermittent delivery spout or
equivalent thereto, also the combination of a distributing plate with a shaking tray
carrying either permanent or electro-magnets and with the automatic brush
arrangement as berein described for the purpose of keeping such magnets clean
and collecting the sweepings in a separate receptacle from the cleaned or separated
material.
6thly. The general arrangement and form of a magnetic machine for separating
iron steel and the like, as shown in the drawings and substantially as described
in the Specification herewith.
D
11
071 1
J100
JOSEPH HOBSON.