Non-magnetic Substances.
Year: 1886

page_text: Non-magnetic Substances.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co, Patent Agents,
Southampton Buildings, in the County of Middlesex 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 iron and other magnetic
substances from those which are non-magnetic.
The said invention is illustrated in the accompanying drawing, in which
Figure 1 is a longitudinal section of the said apparatus, and
Figure 2 is a plan.
Figure 3 is a view of a detail.
Figure 4 illustrates a modification.
The said apparatus consists chiefly of a wrought or cast iron drum e, which is
connected by brass arms f with the shaft g and forms the magnet; and of a
bobbin h made of brass or copper and upon which is wound insulated copper wire.
As shewn this bobbin is fixed upon a strip i and surrounds the drum midway
between its ends; but, if desired, a bobbin may be placed at each end of the drum.
The ends of the wire of the coil or coils are connected with a dynamo-machine.
supplying an electric current.
Around the magnetic drum e and a wooden roller m are placed endless chains k
consisting of bars of wrought iron or other metal, provided with pins of any
desirable length rivetted thereto, and connected at the ends to two leather straps 8, 8
Figure 3. The said chains during the operation of the apparatus move in the
direction of the arrows. Each portion of a chain as it passes over the drum e is
magnetized by contact with the latter, but loses its magnetism again on or before
passing around the wooden roller m.
The material to be freed from iron or the like is placed in the hopper d and
passes therefrom through openings the size of which is regulated by slides o, into
the feed-troughs n, and is uniformly discharged from the latter by the feed-wheels p,
falling upon the inclined planes r by which it is conducted below the drum, the
magnetized pins of the chains passing above the said material.
The iron contained in the mixture is attracted by the magnetized pins, and
carried away by the same, whilst the material freed from the metal falls down the
TD411

page_text: inclined planes q into the space 2. The separated iron remains adhering to the pins
of the moving chain until the said pins have arrived about midway between the
roller m and drum e, where in consequence of the demagnetization of the pins the
separated metal falls off into the space x:
The slide 9 situated below the drum e is adjustable and is placed as far forward
as the chain is magnetic. For demagnetizing the chain, links of brass plate. are
rivetted thereto at suitable distances apart.
The effectiveness of this apparatus is extremely great and the material to be
separated can pass through the apparatus in considerably thicker layers than with
other machines of this class, because the pins of the movable chain extend into the
mass, stirring it up and in this manner carrying with them all particles of iron or
the like.
Figure 4 of the drawing shews; a modification of the apparatus wherein the
chain provided with pins is replaced by a brass drum studded with iron pins. The
construction is as follows.
Upon the rotating magnetic drum e and a wooden roller u is placed the drum.t
of brass or other suitable metal. The said drum is moved by the rotation of the
drum e in the direction of the arrow. The drum is provided externally with
wrought iron pins of the required thickness and length, which during the rotation
of the said drum come near the rotating magnet and become magnetized. They
again lose their magnetism when receding from the magnet e, which demagnetization
commences near the wooden roller u.
The drum t may if desired be carried upon a shaft or it may be carried by the
drum e and roller u as shewn.
With apparatus for working on a sinall scale, the iron pins in the chain k or the
.drum t can be replaced by permanent magnets; in this case the apparatus serves
as magnetic separating apparatus only, so that the wire coils are not required.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1
First. An electro-magnetic apparatus for separating magnetic and non-magnetic
substances, the said apparatus consisting essentially of a cylinder e of wrought or
cast iron rotating upon its axis, and of one or more stationary metallic bobbins h
upon which is or are wound conducting wire and which surround the cylinder e,
and by means of an electric current magnetize the said cylinder.
Second. In electro-magnetic separating apparatus the employment of an endless
chain k, Figure 3, composed of flat bars of iron or other suitable metal having
wrought iron pins rivetted or otherwise secured thereto, which bars are connected
to straps of leather or the like and are periodically rendered magnetic by passing
over the magnetic cylinder e.
Third. In electromagnetic separating apparatus, the employment of a brass
drum t Figure 4, which is mounted excentrically relatively to the magnet e and is
provided with wrought iron pins rivetted or otherwise secured thereto.
Fourth. In magnetic separating apparatus of the class described in the preceding
claiming clauses, the employment in lieu of the iron pins upon the chain or drum
of pins permanently magnetized.