The Wallace miner. [volume] (Wallace, Idaho) 1907-current, 1916-04-20
TUNNEuNG MACHINE
ITS MAIN FEATURES
NEW DEVICE FOR METAL MINES
AND TO Do OTHER UNDER
GROUND WORK.

Recently The Miner made brief ref
erence to tunnel boring machine in
vented by DR.. W. r. Collins of George
town, Colo, an old and intimate friend
of Captain Candee of this city. The
following more detailed description is
taken from the Denver Mining Record:
A new and rather ingenious tunnel
boring machine fully equipped and
ready for service has made its APP
pearance in Denver. 1t differs in
nearly all essential particulars from
any other machine designed for sim
liar uses that has been demonstrated
in Colorado. 1t was invented and per-
fected by DIR. w. r. Collins who, when
he began it, was a practicing physician
in Georgetown, Clear Creek county.
The doctors experiments began
about three years ago in the town
above named and have been carried
ca without material interruption. until
the machine was completed and tested
a few months ago. 1t was frs. en-
ployef in an extensive coal mine,
where it proved highly satisfactory.
Desiring to make practical demon
STATIONS of the results in hard rock,
grante, limestone, &C., and thereby
assure it's success, pr. Collins brought
the machine to G'lora6o short time
ago and had it set up at 523 Seven
tee, - street, Da1vel. where it mdy
now be seen and its various features
explained by the inventor.
Dr. Collins makes the following de-
tailed explanation in regard to his
tunneling machine:
inventor Explains.
The Collins core tunneling or bor-
ing machine is an entirely new device,
intended to drive entries and air pass
ages in the development of coal mines
and metalliferous mining operations;
and in sewers, water and electrical
conduits under cities, wherever the
formation is dry and sufficiently sus-
tanning to avoid caving in.
This machine, protected by United
States and foreign patents, is the pro-
perty of the Collins Core Tunneling
Machine Company, Incorporated.
At the headquarters of the company
there may be seen full sized, seven
foot diameter, standard machine, OPP
Grating under compressed air, its
points and merits being fully explain
al Nv, IN nf ho
This machine is developed along the
lines of the well known diamond core
drill, and mining engineers claim this
to be the practical solution of tunnel
ing machine difficulties.
Instead of diamonds, small chipping
air drills are used, operating at suit
able angles to the breast of the tunnel
according to the character of the
rock and these drills are kept lubri-
Gated from a single self feeding cup.
The machine rests upon casters,
placed at it's corners and is moved for
ward or backward by compressed air
rams or jacks which are placed one on
each side of the machine.
How Anchored and Moved.
These jacks are attached, at right
angles, to a steel anchor bar, having a
centrally placed ram, fitted with hing
ed shoes that are forced against the
sides of the tunnel affording fixed
pressure points for the jacks.
This anchor bar, when in action,
can not move, but the machine can
move freely backward or forward as
desired.
The two side rams are provided with
such air connections and valves that
the machine may be quickly moved up
to or away from the breast of the tun-
mel as desired.
This machine has the most necess-
airy advantage of accessibility to all
parts of the machine, while in opera
ton in tunnel; in fact, there is no
part of the machine that is not get
at-able at any time while it is in OPP
Grafton.
This machine does not require rails
but rolls on the smooth floor of the
bore as it is developed
This machine weighs but two tons
and may be made heavier or lighter if
desired, and may be easily taken
apart, set up and put in operation by
three workmen without the use of q
tackle or derrick.
Cuts Big Bore.
Our standard machine will bore a
tunnel feet in diameter making q
solid core of uncut rock feet inches
in diameter, which passes through the
cylinder in the front end of the frame
Of the machine, where the core is
broken off by proper means. A cir
cular channel s inches in width cut
around this core will produce the Z
foot tunnel Machines may be built
developing other diameters if desired.
In developing coal mines we know
that entries may be driven, with this
machine, at speed of feet per hour.
In lime rock, sandstone and similar
soft rock formations, we claim
speed of TX to 2 feet per hour, and
in granite formations speed of from
A to IL inches per hour. All this work