Daily globe. [volume] (St. Paul, Minn.) 1878-1884, 1883-08-05
IMPORTANT INVENTION.

lMPURTANT lNVENTlUN.
The Patent Secured by Herman Greye,
Esq, of st. Paul, for Separating Ore by
Electricity.
Herman Greve, Esq, of this city, has
secured patent for very valuable and
ingenious invention, which provides for
the separation of ore by electricity. The
patent was obtained through the very COM
petent patent agency of Louis Feeser, of
st. Paul, and is thus officially described:
This invention relates to apparatus for
separating the magnetic particles of pull
verified ores from the non-magnetic par
ticles; and it consists in revolving mag
netized cylinder over which the finely
pulverized ore is fed in thin stream on
one side, and the adhering magnetic par
ticles scraped off from the other side and
allowed to fall into a suitable receptacle
below, constructed as herein specified, in
connection with other parts, all as herein
after particularly described, and then
sought to be specifically defined by the
claims.
The cylinder consists of longitudinal
segmental sections A, of steel, attached to a
suitable circular wood or metal frame, b,
mounted upon shaft, G, as shown. The
shaft is journaled in any form of frame
D, and adapted to be rapidly revolved in
any suitable manner, either by gears E, as
shown, or by pulleys, or any other means.
Upon the outer surface of the cylinder,
at either end, small fanges q are formed,
next to which, around the face of the cyl
Under. small bands b, of vulcanized rubber
or other non-conducting material, are
stretched, and over these non-conducting
bands steel hoops or rings F, are placed,
the non-conducting bands being arranged
to completely insulate the steel hoops from
the cylinder, whereby the electric current
is prevented from short circuiting through
the metal of the cylinder.
Inside the cylinder coil, G, of silk
covered copper wire, is placed by suspen-
sion from the cylinder or otherwise, the
outer coils being secured in close contact
with the interior of the cylinder. The ends
of the coil run in opposite directions and
pass outward through the frame B, cylin-
der A, non conducting bands b, and steel
bands or hoops F, the wire, where it passes
through the frame, cylinder and hoops, be-
ing insulated therefrom by its silk cover
ing, but with the ends exposed outside
the hoops, as shown.
Attached to the frame D at points OPP
poslte the hoops F are brush-shaped Cir
cuit-closers, consisting of heads or bodies
e Fl, in which a number of copper wires,
C, are held and bound tightly around CEN
trail wires, d d, which extend directly to the
dynamo-machine,o may first pass through
rheostats K K, by which the strength of
ha al o4ria ha {oJ DIV
this construction the two brush-shaped
devices II Il form the ends of the poles of
the dynemo-machine, and then, when the
cylinder is revolved and the projecting ex-
posed ends of the coil G come in con-
tact with the brushes II II, an electric cir
cult will be formed between the dynamo
machine and the coil G, while the brushes
are in contact with the ends e e, and the
circuit will be broken while the insulated
steel bands T are travelling beneath the
brushes during the remainder of the rev.
olution of the cylinder on its axis. The
coil G being in close contact with the in
terror of the cylinder A, the latter is mag
netized and becomes q revolving electro
magnet, and the cylinder is thus remag-
netized once at every revolution.
Being formed Of steel, the cylinder re-
tains its magnetic qualities during the
lapses between the breaks in the circuit,
and by recharging it at every revolution a
permanent magnet is secured.
Fig. shows a slight variation in the
form of a circuit-closer, consisting of the
central wire, d or d, around which the
smaller wires are tightly bound, and the
whole secured by bracket or brace, R, to
the frame D; but the action is the same as
when the brush is formed as shown in Fig.
6. Above the cylinder A, on one side, a
hopper L, is suspended, having narrow
adjustable exit, g, through which a thin
even stream of pulverized iron or ether
ore is fed over the cylinder. This hopper
will be made of zinc or other suitable ma
terial that will not affect the magnetic
qualities of the cylinder.
Just beneath the circuit-closers 81 81 8
stationary scraper or brush, M, of rubber
or any other non conducting material, il
arranged to rest against the whole surface
of the cylinder lengthwise and scrape of
the abhearing particles of metal as the
cylinder revolves.
Beneath the cylinder A, and in a line
below the hopper L, is trough or spout
| N, into which the non-magnetic particles
from the ore will fall from the hopper and
cylinder, and below the scraper or brush
NJ is similar spout, Pinto which the mag
netic particles of the ore fall when scrapeG
from the cylinder by the brush.
The ore, as before stated, is finely pull
verified and run in thin stream upon OF
in close proximity to the revolving mag
netized cylinder A, which attracts tht
magnetic particles and causes them to ad
here to its surface, and carries then
around until brushed off by the scraper N
and dropped into the trough P, while TIT
non-magnetic particles fall directly int
the trough N. By this means the mag
netic and non-magnetic particles are easil.
and quickly separated.