Self-Dumping Cage for Hoisting Coal, & c., from Mines. Page: 3 of 4
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UNITED
STATES
PATENT OFFICES
MALVERN W. BURDIC, OF STRAWN, TEXAS, ASSIGNOR OF ONE-HALF TO
TILLMAN IT. SHEPHERD, OF SAME PLACE.
SELF-DUMPING CAGE FOR HOISTING COAL, &c., FROM MINES.
SPECIFICATION forming part of Letters Patent No. 677,175, dated June 25, 1901.
Application filed October 19, 1900, Serial No. 33,664, (No model)To all who7m it maij concern:
Be it known that I, MALVERN W. BURDIC,
a citizen of the United States, residing at
Strawn,in the county of Palo Pinto and State
5 of Texas, have invented a new and useful
Self-Dumping Cage for Hoisting Coal or other
Minerals from Shafts, of which the following
is a specification.
My invention relates to improvements in
io self-dumping cages for hoisting coal or other
minerals, in which a cage working on upright
guides has a tipple-platform and is equipped
with devices for holding a car on said plat-
form; and the objects of my improvement
15 are, first, to provide a simple and easily-con-
trolled dumping mechanism which can be set
at bottom of shaft; second, to secure a posi-
tive action of the dumping mechanism and
reduce the shock and strain commonly inci-
20 dent to the operation of self-dumping cages;
third, to provide a firmer and more easily op-
erated dog for holding car on cage-platform.
I attain these objects by the mechanism illus-
trated in the accompanying drawings, in
15 which--
Figure 1 is a vertical section of cage, show-
ing framework, channel-guides, tipple-plat-
form, car-dogs, levers, and shafts. Fig. 2 is
a top view of cage and rim of mine-shaft.
3o Fig. 3 is a vertical section of entire cage, show-
ing a car held in place by dogs; Fig. 4, a de-
tail view of one of the dumping-blocks and
channel-guides.
Similar letters represent similar parts
35 throughout the several views.
The upper and lower beams A A, connected
by two strong iron bars B B at each end, con-
stitute the frame of cage. To the lower beam
A are secured the boxes G G, containing shaft
4o H, on which are mounted the tipple-supports
C C, carrying platform D. The beams A A
are at each end provided with continuous pro-
. ections E E, working on and adapted as shoes
to guides F F, which are secured to sides qq
45 of mine-shaft. At each side of shaft Ii the
guide F is parallel with and directly between
two of the bars B B, which pass outside of
said guide and,extending over the extremities
of the shoes E E, are secured to the outer sur-faces of the beams A A. The upper extremi- 50
ties of all four of the bars B are provided with
eyes p p for attaching hoisting-cable.
Running crosswise at the middle of plat-
form D is attached shaft K, to each end of
which is secured a diamond-shaped block J, 55
working in the channels I and M M of guides
F F. At the junction of the channels M M
and attached to the apex of the angular frog
L is an antifriction-roller N.
Secured to the shaft K at a point between 6o
guide F and platform D is a reversing-lever
0, working in slot P in the upper portion of
support C and provided with a bolt Q for
locking said lever at the desired position.
The safety car - dogs consists of curved 65
clamps a a, attached to arms b b, hinged at
c c to ears e e, which are secured at f f to
platform D. The arms b b are hinged at g g
to ears h h of levers z s, which are pivotally
attached at jj to platform D. The levers 2 Z 70
are connected by bars k k to the foot-lever 1,
which is pivotally attached at 7n to platform
D, at which point is secured cap n for restrict-
ing movement of said lever.
The dumping -blocks J J, previously re- 75
ferred to and shown in detail in Fig. 4, are
reversible by lever 0, through which means
said blocks can be thrown to pass through
either of the diagonal channels or switches
M M. The lever 0 can be set in the position 8o
desired by the operator at bottom of shaft,
where car is loaded, and will cause the cage
to dump at either side of shaft, according to
the position of said lever, thus dispensing
with the necessity of signals, as in the case 85
of cages which are controlled at top of shaft
by dumping-irons.
The channel-guides F F being of broader
dimensions afford a better bearing-surface
for cage and can be more securely fastened 90
to sides of shaft than the six-inch square
guide commonly used.
At the dumping-point, where the block J
passes through the diagonally - connecting
channels M N, the guides may be made of 95
such material as is necessary to resist the
wear occasioned by friction at this point.
I prefer to carry out that feature of my in-
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Burdic, Malvern W. Self-Dumping Cage for Hoisting Coal, & c., from Mines., patent, June 25, 1901; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth515027/m1/3/: accessed June 30, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.