i STEAM COAL - Clpdigital.org
i STEAM COAL - Clpdigital.org
i STEAM COAL - Clpdigital.org
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36<br />
So long as coal remains the basis of industrial<br />
progress, any means or method which results in<br />
a reduced cost of coal production must be of<br />
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THE <strong>COAL</strong> TRADE BULLETIN.<br />
A NEW RADIAL <strong>COAL</strong> CUTTER.<br />
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Vertical Shearing.<br />
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interest to all branches of productive industry.<br />
Machine methods have long held prominent place<br />
in the coal mining field and the "puncher" or<br />
pick machine is a recognized factor in coal mine<br />
economy. But long years of experience<br />
with this machine have clearly established<br />
its limits of usefulness, and the need of<br />
another machine to supplement or assist<br />
the "puncher" has long been acknowledged.<br />
Such a machine is the new radial<br />
coal cutter, recently placed on the market<br />
by the Ingersoll-Sergeant Drill Co.. of<br />
New York. While only lately brought<br />
before the public, this machine has for a<br />
long time been in severe experimental<br />
service in some of the largest producing<br />
coal mines in the country and its performance<br />
there has aroused general interest<br />
among coal mine operators. The<br />
radial cutter is designed especially for<br />
the work of shearing and entry driving.<br />
The idea of the radial mounting is not<br />
new, but as applied to the requirements<br />
of coal mining it is claimed to be a distinct<br />
innovation which may revolutionize<br />
certain processes of coal mining, particularly<br />
as a means of rapid development.<br />
The economical development of coal properties<br />
imperatively demands the use of a shearing ma<br />
chine, but the requirements of the situation are<br />
so severe that many devices intended to meet<br />
them have been abandoned after discouraging tests.<br />
In coal mining catalogues but little has<br />
been said and little information given on<br />
methods of entry driving, on entry-driving<br />
machinery, on shearing, drilling, cutting<br />
out slate or other bands, and on<br />
other economical questions of importance<br />
more or less vital to the industry. A<br />
machine to meet the conditions properly<br />
must be light, simple, durable and eco<br />
nomical of power. It must also break<br />
the coal without producing an unduly<br />
large percentage of the smaller sizes.<br />
In operation, the new radial coal cutter<br />
has met these requirements. As an undercutting<br />
machine it is adapted for undercutting<br />
headings to any desired depth<br />
at a single setting. It will also shear<br />
either one or both of the sides of an entry,<br />
from the floor of the mine to the roof, to<br />
any desired depth at one setting. The<br />
drill or cutter being mechanically directed,<br />
all these operations are performed<br />
without shock or jar to the operator. The machine<br />
is light, and easily and quickly moved and<br />
niounted. The cut made by the radial coal cutter<br />
is 8 feet in depth and diminishes from a width of<br />
Under Cutting.<br />
4% inches at the face to about 2 inches at the<br />
bottom. The piston and chuck having a rotating<br />
movement, the machine can be used as a drill for