Yorkville enquirer. [volume] (Yorkville, S.C.) 1855-2006, 1905-05-12
USES FOR MAGNETS,
lift Heavy Weishts-separats Hare
Substances From Grain-ln Sur

The value of electro-magnets as
time and labor savers for lifting heavy
pieces of iron or steel In the industrial
world is now quite generally recog-
nized. and their installation In connec-
ton with cranes and other types OF
conveyors Ia being carried on exten-
sively. The designing Of these elec-
tro- magnets. says the American In
ventor, has attained such perfection
that their lifting power extends up to
ten and twelve tons.
In operation. the magnet Is lowered
upon the material to be lifted, and the
switch closed, thus causing the magnet
to attract and hold the material, which
may be hoisted by the crane and
transported to the desired point By
simply opening the switch the mate
rial Is instantly released.
In larges steel and iron plants, where
there Is a constant accumulation OF
defective and useless castings, the use
of the high efficiency magnet Is es-
pecially valuable for lifting and drop
ping huge steel spherical ball weigh
ing one to six tons. which crushes the
old castings into small pieces 80 that
they may be readily remelted. This
employment Is called skull cracker
work"
The employment of magnets In 9TH
or fields Of industry. however, Is OF
more recent occurrence than In roll
ing and steel mills. They are used In
great variety of ways, and their en-
ployment sin new industries Is con-
stantly extending. The concentration
of the heavy metallic parts Of ores by
electro magnetic and electro static
methods, with the rejection OF the
worthless gangue material, Is pro-
cess which has developed remarkably
in the past few years.
The employment Of the electro-mag-
net for recovering scrap iron Is like
wise an important development. Both
foundrymen and manufacturers en-
ploy electro magnetic separators to
recover metallic substances from waste
scrap. Brass. copper, babbit. rubber
and other materials are separated from
iron and steel chips In the most eco
nomical way.
In plants where a good deal OF brass
and copper are used the waste Is plac-
ed In large magnetic cylinders pro-
vided with, strong electro-magnets and
every part. Of magnetic material, even
to fine iron and steel dust, Is separa-
ted quickly and effectively. The pro-
cess Is 80. economical that the price
formerly received for the scrap will
pay for the total operation.
The use Of magnets has more re-
Gently been extended to -four and rice
mills to separate any hard, metallic
material from the grain. The fine flour
dust which collects In -four mills Is
very often highly infiammable, and
spark of fire might cause violent ex-
plosion. The greatest care has to be
exercised to prevent any such acci-
dent. One frequent cause Of such ex-
psosions has been sparks produced by
gritty, metallic substances contained
in the flour being ground suddenly be-
tween the rollers. Such a spark has
caused explosions that have wrecked
valuable machinery and started large
fires. y
The use of the electro magnet In
surgery Is another field which has
Welded some excellent results In the
past year or two. The removal OF met
al substances from the throat, lungs
and stomach have been successfully
accomplished. One of the most noted
cases of this kind was the removal oi
a nail from the left bronchus, just be-
hind the base of the heart, Of child
by an electromagnetic.
| BY an X-ray machine the piece OF
metal was located, and special mag
net was constructed This consisted OF
an iron core five eighths Of an inch IN
diameter and eleven inches long, Ia
pered at the end. The lifting power
of the magnet was 100 grammes' and
the pull was sufficient to attract SIN
gle nail through a distance OF two
Inches. BY combining the use OF the
X-ray machine with electro magnets
surgeons are finding the necessity OF
many delicate operations with the
knife less imperative than formerly
New York Sun.