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Патент USA US2407570

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Sept; 10, l94i6.
Filed May 29, 1944
2 Sheets-Sheet 1
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Patentecl Sept. 10, 1946
Glenn W. Merritt; Bowerston, Ohio, assignor to
The Mining Safety Device Company, Bowers
ton, Ohio, a corporation of Ohio
Application May 29, 1944, Serial No. 537,943
4 Claims.
This invention relates to car dumping appara
tus. It has to do with that type of dump having
a rotary cage in which a car, for instance a mine
or railroad car, is received to be inverted for the
purpose of discharging the contents.
Taken collectively, the improvements hereof
are operable to control the turning over of the
cage and relate particularly to the starting and
stopping thereof.
(01. 214-52)
i 2
illustrated in Figures 4 to 6, inclusive is located
at the opposite end of the dump at the zone B.
Cages of this type are well-known in the art
and the details of cage construction will be
omitted except where necessary to properly de
scribe the invention.
At one end of the cage is a ring rail 6, Figure 1
and a similar rail 1, Figure 4 is located at the op
posite end. Said rails are supported on wheels
One object of this invention is to provide a 10 8, one of which as shown at 8a, is a driving wheel ‘
dump of the class described having a novel posi
for revolving the cage. This wheel is mounted on
tive starter for the cage whose driving and driven
a shaft 9 which is driven by gear ID, on shaft 9
elements will not jam in a dead center positional
and gear I l on the shaft l2 of a two-speed motor
relation thereby preventing damage thereto to
[4 whose operation is preferably automatically
gether with novel means for checking the mo 15 controlled to rotate the cage slowly at the start
mentum of the cage near the end of the dumping
to a point where the car starts to empty andthen
cycle operable to bring the cage to a cushioned
at a higher rate of speed in order to reduce the
stop thereby reducing wear and tear on the
time for the complete dumping cycle. The cage
equipment, particularly the rail aligning stop, and
is slowed down as it approaches rail aligning po
providing for more positive control over the
sition by a limit switch l5 whose actuatorl? is
stopping of the cage.
Other objects and advantageous features ‘will
be noted in the accompanying drawings and
written description wherein like reference'char
acters designate corresponding parts and where
Figure 1 is an elevation of one end of the dumv
illustrating the novel positive starter.
engaged by a cam I'l rotating with one of the
ring rails to energize the low speed windings of
the motor. The motor circuit is de-energized by
a stop switch I 8 whose actuator I9 is arranged to
25 be engaged just before the cage reaches rail align
ing position by another cam 20 carried by the
ring rail, Said motor may be provided with a.
magnetic brake to further assist in stopping the
Figure 2 is a detail view taken in the direction
cage. The location and number of these switches
of arrows 2-2 of Figure 1.
30 may be varied depending on the type and size of
Figure 3A is- a detail of the positive starter
cage and other factors, the principal objective
showing the parts in another position.
Figure 3 is a detail of the positive starting lug.
however being to complete the dumping cycle in
a minimum interval of time while maintaining
Figure 4 is an end elevation. partly broken
positive control over the movement of the cage
away of the opposite end of the dump illustrating CO Ur and eliminiating rough treatment thereof insofar
the means for checln'ng the momentum of the
as it is possible to do so by these provisions.
The positive starter, Figures 1, 2, 3 and 3a. may,
Figure 5 is a detail view taken in the direction
for example, comprise a plurality of equidistantly
of arrows 5-—5 in Figure 4.
spaced pins 2| mounted on the side of the drive
Figure 6 is a detail showing the cage as it ap 40 wheel 2:; just below the periphery thereof, this
proaches rail‘ aligning position illustrating the
general idea of positively starting a cage by means
means for checking the momentum of the cage at
of such pins being disclosed in the patent to G. W.
the beginning of the working stroke.
Merritt, number 1,735,778.‘
Figure 7 is a diagrammatic view in side eleva
Pins 2|, Figure 1 are ‘adapted to engage a ver
tion of a car dump of the class described.
tically disposed triangular shaped lug 212 pivotal
With reference to Figure 7, l is the cylindrical
rotary cage of a car duemper having thereon rails '
2 for supporting a car 3 to be dumped. 4 is the
approach track and 5 the receiving track over
which full cars arrive at and empty cars leave
the dump respectively.
The positive starter, illustrated in Figures 1, 2,
ly attached to a thrust plate 23 located in a re
cess 24 between vertical webs 125 formed in the
web of ring rail 6 to minimize the shear on the
securing bolts 26. Said lug 22 is free to pivot on
or with its horizontal, off center mounting pin 21
which is journaled in a boss 28 formed integral
with the thrust ‘plate, however upward movement,
3 and 3a is located at the right hand end of the
is limited by a horizontal stop 21' projecting from
dump at the zone designated by A while the
the thrust plate which engages a notch 30 formed
means for checking the momentum of the cage 55 in the upper edge of the lug. Downward move
ment is limited by a stop member 3| projecting
inwardly toward the ring rail from the side of
lug 22 in such position as to engage the inside
surface of the rail or any other suitably located
surface and normally hold the lug in approxi
mately' the position shown in Figure 1 with one
of the lug tips 32 projecting outwardly beyond the
rail into the circular :path ‘of ‘travel of thepins
2| aboutlzthe axisao'f shaft 9.
In prior art structures, where pins similar to
pins 2| are rigidly mounted in the side of the '
drive wheel and ring rail and are arranged to
travel in intersecting circular paths, it ispossible '
for a driving pin and a driven pinto come to
gether in a dead center relationship :as the page
completes its revolution and returns tocar re
ceiving position.
While in starting up the case.
there is no danger of such ,an'event occurring;
the shock and jar from the rail aligning lock.
The cushion stop may be co-ordinated with the
motor controls if desired to become effective at
or about the time the cage is decelerated by the ,
the previously mentioned operation of switching
the drive motor to the low speed windings.
I claim:
1. A car idumper of the "character described
comprising, a rotatably mounted cage having ring
rails at the ends thereof, ‘an approach track
leading to the cage, a receiving track leading from
the cage, wheels supporting said cage by means
of said ring rails, means for driving one of said
wheels to rotate said cage and a positive starter
for imparting initial movement to said cage in
:cluding athrust member rigidly mounted onthe
side of said wheel and rotatable therewith, a
*thrust receiving member rotatably mounted on
saidcage and movable therewith, the axis of the
the drive may slip after the cage has been start
ed and the pins have separated due to moisture 20 rotatable mounting of said thrust receiving mem
ber .onsaid cage being located above and to one
.or grease on the drivingv and drivensurfaces or as
side "of thepoint of contact of said thrust mem
the vresult of acceleration or deceleration of the
berQand thrust receiving member when incon
drivewh'eel. Consequently, either .one'or .both
tact and means for limiting the rotation of the
of the pins [may be, bent or broken off.
. ‘In’ the presentconstruction,» the tip 32 of the 25 thrust receiving member.
intersecting circular paths. It is preferred. that
2. A car dumper ,of the character ‘described
comprising, _a rotatably mounted cage ‘having
relationship, however‘ the axis of rotation of the
lug pivotally mounted on said cage and, project
lug and the pins 2| on the ‘drive wheel travel in
ring rails at the endsthereof, an approach track
the-tip project sufficiently far into the circular
leading'to the cage, a receiving track leading
path-of travel of. the pins, see Figure l, to main~
'tain the. starting ‘thrust through several degrees 3,0 from the cage, wheels supporting said cage by
means of said ringrails, means for drivingione
of rotation of the cage in orderto gain momen
of said wheels to rotate said cage and a positive
tum before the drive is taken up solely by the
starter for imparting initial movement to said
drive, wheel. As thercage .completes its revolution
cage including a thrust member rigidly mounted
and returns to car receivingposition, see Figure
3A, itispossible for the tip 32 of the lug and one , - on the side of said wheel and rotatable therewith,
and a thrust receiving member in the ,form of_ a
.ofi the-pins 24 to reach a dead center positional
ing outwardly therefrom to intersect, when ro
tating with the cage, the circle of rotation .of
the axissoftthe cage passing through said point 40 said thrust memberv and means for limiting the
rotation of the thrust receiving member. 7
:of contact. Therefore, the lug tip will be dis
lug on the ring rail web is ahead of and above
- the ,pointdofrcontact and not on a line radial to
“;placed vupwardly by the pin and, the bottom sure
,facecf-the lug will ride harmlessly on top or the
spin. _ vAs the pin moves on, the lug will drop
down therebehind inposition to be engaged by
the next pin in succession upon subsequent start
3.,A .car ,dumper of the character described
comprising, a rotatably ¢mounted cage having
ring rails ,at the ends thereof, an approach track
mi leadingto the cage, a receiving track leading ,
from the cage, wheels supporting said cageby
ing up of the, cage.
v.A-tt'he other endof the dump and on the op
posite side .of the cage is the novel means (some
means of said ring rails, means for driving one
prises, ~for example, a ?uid displacement device
having a cylinder 35 inwhich a valved piston 36
placeable lug pivoted on the sideof the cage, and
a stop member for limiting the angular move
isadisposed, mounted on one of the stationary
ment of saidthrust receiving member. ‘
of‘ said wheels .to, rotate .said cage. andv a positive
starter for imparting initial movement to said
times called a retarder) for checking the mo- 5,, cage including a thrust member rigidlymounted
.on the side of said wheel and rotatable therewith,
mentum of the cage as it completes its revolu
a thrust receiving member inithe form of a dis
tion, seeFigures 4; 5 and 6. Said means com
frameermembers 31. The piston rod 38 is con
nested-‘to, a counterbalanced lever 39 pivoted at
.40 ton :a'standard M.
A pin A2 mounted on a
bracket :43attached to ,a cage part and rotatable
vwith said cage is adapted to engage an inturned \
?ange portion 44 of the lever 39, Figure 6, as the
cagereturns to upright position and raise the
lever thereby forcing :the- piston downwardly in
the cylinder and displacing the ?uid upwardly,
the .valve being .setto, provide the proper back
pressure toinsurea cushioned stop. The piston
.isipreferably not releaseduntil thecage starts
on. the next revolution and as soon as the pin 42
'4. A car ,dumper of the character described
comprising, a rotatably mounted, cage having
ring rails at the ends thereof, an approach track
leading to said cage, a receiving track leading
from said cage, wheels supporting said cage by
means -.of said ring rails, means .for driving one
of said wheelsto rotate said cage and a re-tarder
for checking themomentum of the cage in the
?nalstages of angular movement comprising a
vertically positioned hydraulic cylinder having a
.piston -therein,. a.piston rod, a counterbalanced
lever .connectedlto said piston rod, ,-.a member at
tached- to and rotatable with said cage to engage
.said lever and depresslsaid pistonto .bereleased
.dis?hgages the lever, the counterweight .45 re
turns the leverLfrom the position shown in Figure 70 therefrom upon commencement of thenext revo
lution of the cage. "
Alto theposition shown in Figure 6. Thus the
dump issently slowed to ,astop thereby removing
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