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Nov. 5, 1946.
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Filed Aug. 17, 1942
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7 Sheets-Sheet 4
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Nov. 5, 1946.
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Filed Aug. 17, 1942
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Patented Nov. 5, 1946
Gilbert Smith, Fayetteville, W. Va.
Application August 17, 1942, Serial No. 455,091
11 Claims. (Cl. 298-4)
This invention relates to improvements in self
Fig. 16 is a side elevation of the structure of
dumping pans or boxes such as used in my Pat
Fig. 15.
ent No. 2,138,750 dated November 29, 1938, and
application Serial No. 356,879 ?led September 14,
double ramp dump.
The main object of this invention is .to con
Fig. 17 is a room layout showing the use of the
Fig. 18 is a section on line 23-30 of Fig. 16.
Fig. 19 is a detail plan view or‘ a single ramp
struct a pan or box for use in handling coal and
dump layout with the invention of Fig. 12 illus
like material in conjunction with an unloading
trated, and
Fig. 20 is a diagrammatic transverse elevation
10 to illustrate coal and slate seams.
With reference now to Figures 1, 2 and 3 there
Another object is to construct a dump box or
is illustrated my preferred form of dump box or
pan in such a manner that the drop doors are
pan. This pan is known ‘as the clam shell'type
capable of assuming closed position after dump
and includes side walls til and end walls 5!. At
ing by virtue of cooperation v ith portions of the
iii each inner corner of the box there is provided a
unloader platform,
housing for enclosing a hinge for support and
Other objects reside in constructing an assem
movement of the bottom sections. ‘The shape,
bly of the type in question in which maximum ca
construction and arrangement of these hinge
pacity is obtained with extremely low side walls
housings is best illustrated in Fig, 3 and it will
and further to secure automatic discharge of the
20 be seen from this figure that they are each formed
entire lading without aid of auxiliary means.
of angular top plates 53 which project from the
Still further objects reside in such structural
end walls 51, at their junction with the side walls
details as contribute to the strength and rigidity
5t extending inwardly and downwardly to ter~
of the assembly, without use of expensive expedi
minate ?ush with the bottom edge of the side and
ents in structure or assembly.
end walls. The side plates 52 of the housings are
Other objects will more clearly hereinafter ap
parallel to the ?at portions of the end walls 5!,
pear by reference to the accompanying drawings
and are each sufficiently spaced from its adjacent
forming a part of the speci?cation and wherein
end wall portion to provide for the proper ar
like characters of reference designatecorrespond
rangement of the hinges therein. The side walls
ing parts throughout the several views in which:
Fig. l is a top plan view of my pan in its 30 52 are preferably formed as an integral part of
apparatus and in which the dumping operation
is entirely automatic.
the angular top plates 53 although the speci?c
preferred embodiment.
mode of fabrication may not be of importance.
Fig. 2 is a side elevation partly in section of
Within these pockets are suspended the hangers
Fig. 1.
or hinges 5d. The upper ends of the hangers or
Fig. 3 is a transverse section.
Fig. 4 is a top plan view of the modi?cation of 35 hinges are mounted on the pins or bolts 55 which
constitute pivots therefor, and the lower ends are
Fig. 1, with one-half in horizontal section.
?ared to provide relatively large faces for at
Fig. 5 shows a partial top plan view of a modi
tachment to the door sections. The enlarged
fled form of scoop including the use of three
free ends 5t of the hinges are curved to conform
to the door surface 5‘! to which they are attached
Fig. 6 is a longitudinal section of the form
and are secured to such faces by riveting or
shown in Fig. 5.
welding as may be desired. It will be noted that
Fig. '7 is a transverse section.
the pivot pins 55 extend transversely of the hous
Fig. 8 is a plan view of another pan modi?ca
ings, through the side walls 52 of same and
Fig. 9 is a side elevation of the pan of Fig. 8. 45 through the adjacent end walls El of the pan and
are removable to permit repair and interchange
Fig. 10 is an end elevation of Fig. 8 partly in
Fig. 11 is a. top plan of an unloader platform.
Fig. 12 is a side elevation of Fig. 11.
of these hinge parts.
The hangers Ell have their pivotal mountings
55 positioned inward of the side walls so and up
Fig. 13 is a sectional view on line |3-~i3 of 50 ward of the bottom surface, the location being
Fig. 11.
Fig. 14 is a front end elevation of the structure
of Figs. 11 and 12.
Fig. 15 is a top plan of a modi?ed form of dou
ble ramp dump.
determined by the size and curvature of the door
sections to’ and its structure with respect to the
other portions of the assembly whereby the de
sirable movement is obtained. Inasmuch as the
55 bottom door sections with the illustrated suspen
sion will partially swing upward within the Con
?nes of the side walls 58, it is essential that pro
vision be made to protect these doors from con
and 84. The door sections 83 and 84 comprise
substantially two-thirds of the lading bottom of
tact with the lading. in order that their move
the pan and cooperate with a central door sec
tion 85 to complete the bottom closure. The cen
ments may be entirely free. To provide for this
the deflector plates 58 are shown arranged in
ward of each side wall 50, the de?ector plates
trol door section 85 has its ends ?anged upwardly
at 86 and centrally perforated at 8'! to receive
being flanged under the upper marginal edge of
These portions may be suitably reinforced by
trunnions 88 which extend from the end walls Bl .
adjacent plate sect-ions illustrated at 89, the pur
inwardly to a point. positioned 10 pose being: to provide suitable supporting trun
inwardly oi‘ the reinforced longitudinal edges 53
nions for the free-swinging movement of the in
. the adjacent scoop structure and being inclined
de?ning the inner extremity of the horizontal
?anges 68 of the side walls. This arrangement
of the de?ector plates ‘53 provides compartments
of sufficient capacity to freely receive the curved
outer edge portions of the bottom door. sections
59’ during their opening movement. It will also
be noted that the de?ect-or‘ plates have a two
fold function in that they not only provide one
wall of each door housing but also during un
loading of the scoop facilitate the discharge of the
lading. In Fig. 3 I have illustrated in dotted line
at 6! the position assumed by the hinged door. It
will be noted that this door dropsmaterially below
the normal bottom line of the pan while. un 25
termediate door section 85.
It will be noted that the door sections overlap
and that therefore, the elevation of the sections
vary in accordance with the overlapped arrange
ment. To accommodate for this the runners 85’
on the different doors will be of relatively differ
ent diameter in order to bring the bottom hori
zontal ground engaging‘ line to a common plane.
In the invention shown in. Figs. 5, 6 and 7 the
central door section 85 being slightly elevated
above the outer hinged sections £33 and M neces~
sitate the use. of the relatively thick runners 85".
The pan shown inFigs. 8, 9, and 10 represents
an improvement over that pan disclosed in my
prior Patent No. 2,138,750 dated November 29,
Referring now to the details of construction of
the pan of Figs. 1, 2 and 3, it will be noted that
1938. This pan is of relatively low structure in
cluding side walls 538 and end walls 9 IV all of which
the marginal edges of the horizontal flanges til
are reinforced at their upper edges by inturned
are substantially beaded at 59- and reinforced. by 30 ?anges 92 as shown in Fig. 9. The marginal
door hinge rod 69' which support in hinged rela
portion of the bottom 83 is rigid with the side
tion the door sections 58'. It will also be noted
walls and is bent downwardly at St to form por
that the runners 6 l ', each of which is in rectangu
tions of elongated hinged barrels, which latter
lar form, are arranged with their adjacent con
are completed by the roller edges 95 of the bot
trol longitudinal runner portions substantially
tom plates 96 and 9?. To the bottom plates. 96
near the inner free edges of the door sections 5?,
and 9? are ?xed the runners 98 and 98’ being
while t eir outer longitudinal runner portions are
bent upwardly at their extremities 89 to extend
so positioned as to be free from contact with
about and reinforce the beaded edges H33 of the
parts of the pan during the dumping operation.
bottom end portions. Cable couplings iii‘! are
The ends of the runners 6i’ extend beyond the 40 provided at each end of the pan.
ends of the pan or box and are bent upwardly as
The deflector l i l for handling the car loader or
at 62 to permit free drag in either direction.
pan, forming the subject-matter of my applica
tion Serial No. 356,879 ?led September 14, 1940, is
Plates G3 are positioned over the extending run
ner ends as best shown in Fig. 1. Centrally at
each end of the dump pan are the angular pivoted
cable grips 64 horizontally pivoted by means of
pins 65 to the ?xed plates 65. The plates 65 are
welded or otherwise secured to such portions of
the pan structure as the end walls 51. end head
59, or cross brace 67 as best shown in Fig. 2. It
will be noted by reference to Fig.- 1 that the cor
ners of the pan are curved to aid in its travel
under urge of the cable mechanism, and these
curved corners are braced and reinforced by the
curved corner plates 68. In Fig. 20 there is shown
in section the type of mine structure in which
the present, development is particularly adapted.
In this disclosure it will be noted that the coal
adaptable for use in many types of mines and
is primarily designed to eliminate trackage and
permit substantially closer timbering than is prac
tical with other mechanical methods of loading.
Figure 19, illustrates a single track entry layout in
which the head rope is indicated at i l9, de?ector
at H], the pan passing around the deflector at
H2 and the tail rope H3.
The ropes or cables
I iii, H3 extend to the dump assemblies indicated
generally at i id. These dump assemblies in
cluding the cable connections are shown in detail
in Fig. 12.
Referring now to Figs. 11, 12, 13 and 14, it will
be seen that the elevated frame beneath which
the cars are shuttled and from which the pansare
seam is indicated and above the coal seam is the
discharged includes adjustable uprights or posts
slate structure. Obviously, the less of this slate 60 I28, in the present instance two being positioned
which may have to be removed to permit the use
for supporting the forward end of the horizontal
of the present unloading apparatus, the more
tracks forming the unloading stand and twobeing
pro?table will be the mining operation. It there
positioned to support the rear end of the same.
fore, follows that by using the pan illustrated in
Each of the posts includes a stake or jack of
Figs. 1, 2 and 3 much labor in the mine is elim
somewhat the same type as utilized in the de
inated and the pro?ts of those concerns in the
hector structure in that the lower end of the base
mining operation may be materially increased.
portion is pointed as at l2! to readily secure. the
Figs. 5, 6 and 7 illustrate a modi?ed form of
necessary footing. The upper end is provided
scoop or pan, in which the bottom is formed of
with the adjustable threaded screw £22 actuated
three hinged door sections.
70 by the nut I23 provided with operating handles
In these ?gures the scoop is of the three door
I24. The screw E22 carries the swivelled plate
type and as in other instances it includes the side
125 for engaging the mine ceiling and the struc
walls 88 and end walls 8 l. These walls are ?anged
ture of this plate may be modi?ed in accordance
inwardly at 82 and to the longitudinally ?anged
with requirements. Thus it will be seen’ that the
side edges are hinged the drop door sections 83
main supporting elements are provided for quick
assembly and disassembly. The tracks of in
turned angles I38 are clamped, bolted, welded
way ramp, this arrangement being more clearly
or otherwise secured to the uprights I20 at a
suitable elevation and likewise the transverse
supporting opposed channels I3! are secured to
each pair of posts below the angle lilil and eX
type illustrated in Figs. 1, 2 and 3 is shown in
unloading position, the side walls 50 of the pan
and the drop doors 55'!’ being clearly shown, with
the doors in their lowered or discharge position.
tend laterally of the posts to provide supporting
The cable arrangement necessarily diifers from
illustrated in Fig. 16.
In Fig. 16 a pan of the
the cable arrangement in the single dump set-up,
arms for the pulleys I32, which latter are mounted
however, such cable arrangement is generally il
in the supporting frame I33 and secured in posi
tion by suitable means securing the transverse 10 lustrated in diagrammatic manner in Fig, 1'7 in
which the pans are illustrated at S, S’, the pan
support ISI and the ?anges I34. The supporting
3 moving toward the unloader and the pan S’
structure between each pair of posts includes the
moving towards the de?ector T. The structure
opposed channels I3 I, heretofore mentioned, upon
of the two-way ramp or unloader set-up is in
which is secured the plate or cap I35 (see Fig.
13). This plate I35 is bent upward at its front 15 substance the same as that in the single un
loader set-up of Figs. ll, l2, 13, 14 and 19 in that
edge I 36 and at each end lsl, the former bent up
the adjustable stakes I 28 are utilized for posi
portion on vertical flange I36 being the securing
tioning the apparatus and the ramp includes the
means for the ramp and the end plates it‘! being
side angles M2 and the connecting sheets I53.
used to mount the hinge pin I39 and the support
Guide rollers Il'll at each end of the ramp are
ing roller Hill. The roller I 48 is interposed be
supported by the uprights I'II formed of suitable
tween the downwardly bent ends Hill’ of the side
angles and constituting footing for the laterally
rails or angles ltd and the upper end of the
extending angular brace sheets I12.‘ In this as
ramp supports M2 and operates as a transfer
sembly there is an intermediate support I73 for
medium between these parts and for the loader
one end of the unloader section of the ramp to
pan shown. The hinge pin I39 supports the
vertically adjustable plate Idli' which functions
permit offset arrangement of the adjustable stake
as the control member for the hinged bottom
plates of the pan. Side supports M3 are ad
lit for the accommodation of the multiple pulley
set-up Illi essential to proper connection with the
Windlass illustrated diagrammatically. at I16 in
Fig. 17. The connection of the cable with‘the
Windlass and with the pans, including their co
operation with the deflectors and guide stakes is
also illustrated in this ?gure. By the arrange
ment of ramp shown, it will be apparent that a
justably carried by the angle members 539 by
means of the slot and bolt connection HM and
a latch M5 cooperating with a pin M5’ on the
plate M0’ to secure the parts in their upper posi
tion when desired.
At the entrance end of the horizontally ar
ranged unloader frame there is provided the in
clined ramp i511 which terminates adjacent the
angular ends 539’ of the horizontal angles I 38
substantially continuous loading and unloading
of the pan may be accomplished from two 010
posed cuts and by means of a single power set-up
and comp-rises inturned side angles I42 with
using a continuous cable.
connecting plates E53 alonDr which the pan travels '
ing unloaded the other is in loading position at
the end of the cut and this arrangement could
in its movement to the horizontal frame I353
from which the load in the pan is discharged.
While one pan is be
be modi?ed to use additional pans on the same
cables although such an arrangement is not il
lustrated. It will be noted that the support for
the guide rollers I'm is somewhat modi?ed or
of the outwardly flared anchor plates I54. Ad 45 simpli?ed at each end of the ramp elements I42
jacent the outer ends of the anchor plate and
in that angle structures are used for the uprights
inward of the same are. the uprights I 55 and
I'II which uprights are braced by the angle struc
556 formed of joined angles and between which
tures Ill connected intermediate the ramps. The
is journalled the guide roller it? at a proper
deflecting braces I'IZ constitute also braces for
height to provide the necessary clearance for the 50 the uprights HI and perfect a rigid but inexpen
sive structure. The ramp assembly and the parts
pan and engage the manipulating cable. The
constituting the same are connected by separa
and I56 which support the roller
I51 are of angle form with one arm of each out
ble connections such as bolts where the parts are
to be separated during assembly and disassem
turned to provide a shelf E58’ upon which the
cable guides or pulleys I58 and IE9 are supported. 55 bly. It is also contemplated that the dual ramp
arrangement may be applied to the single ramp
These pulleys are in vertical alignment with the
arrangement by duplicating the ramp end of the
pulley I32 and in longitudinal alignment with the
The ramp is formed of such a length as to pro
vide a suitable angle for proper manipulation of
the pan, the lower end being anchored by means
pulley SI whereby the operating cable is main
tained in proper alignment for operation of the
What I claim as new and useful and desire to
pan. At the junction of the inclined ramp I50 60 secure by Letters Patent is:
l. A mine scoop including side and end walls,
and the horizontal guide rail I35 is the transverse
guide roller Me which cooperates with the roller
and a bottom, said bottom including hinged sec
I51 heretofore described in the operation of the
tions, the outer sections of said bottom being
swingingly suspended by hangers the upper ends
apparatus. The rollers It'lll and I55 align the
cable I55! with the Windlass i6! driven by the 65 of which are pivoted to supports located interme
diate the vertical height of said end walls, and
motor ISI'. The motor Iti' is provided with
de?ector plates in said scoop forming with said
the return pulley I62 which receives the cable
side walls compartments to receive said outer
swinging bottom sections when in their elevated
Referring now to Figs. 15, 16, 17 and 18 there
is illustrated a two-way ramp or unloader mech 70 position.
2. A mine scoop including side and end walls,
anism, which by reference to Fig. 17 is capable
rigid bottom sections adjacent the side walls, and
of accommodating pans or buckets travelling
hinged bottom sections, said hinged bottom sec
from opposed cuts M, N at each side of the trans
tions including pivoted hangers ?xed to the end
versely arranged rails P. It will be noticed that
wall at a position permitting the said bottom sec
the cars R travel on the rails P beneath the two
tions to swing inwardly of the side walls, and
hoods extending from the end walls and enclosing
present a ground engaging surface lying in a
common horizontal plane, and upturned de?ec
tors at each end of said bottom sections, said up
turned de?ectors being reinforced by projecting
said hangers.
3. A mine scoop including side and end walls,
a sectional bottom, hinged hangers for said sec~
tional bottom ?xed to the end walls, inclined de
ends of said runners.
?ector sheets projecting downwardly and in~
8. In a mine scoop including side and end walls,
?xed inwardly projecting bottom portions ex
wardly of the side walls for enclosing said bottom
tending from the side walls and terminating in a
sections when in their dumped position, and
reinforced beading, said beading extending
10 throughout the length of said ?xed side wall por
hoods for said hangers.
tions and being connected by beading extending
4. A mine scoop including side and end walls, a
bottom, said bottom including a plurality of sec
along the lower horizontal portion of the end
tions, certain of said sections being hinged in
walls, de?ector plates projecting downwardly and
inwardly from the upper longitudinal edges of
ward of the lower marginal edges of said side
walls, an additional bottom section hinged with >
said side walls, and bottom sections for said
its axis extending from end to end of said scoop
scoop, said bottom sections being suspended by
hangers ?xed to said end walls and including up
and arranged intermediate the side walls, and
turned outer marginal portions adapted to be
individual runners for each bottom section in
cluding spaced central portions and upturned ex
con?ned between said deflectors and said side
20 walls when said bottom sections are in discharge
5. A mine scoop including side and end walls,
rigid bottom sections extending inwardly from
9. The substance or claim .8 characterized in
the side walls, and hinged bottom sections swing
that hoods extend inwardly and downwardly from
ing downwardly from said rigid bottom sections,
the end walls to enclose said hangers.
10. A box type loader for mines comprising side
runners for each hinged bottom section, said run
ners each including a pair of spaced runner ele
ments and said runner elements being each of a
and end walls, ?xed bottom portions adjacent the
side walls, swinging ‘bottom portions providing
thickness to engage a surface in a common hori
a closure between the inner marginal edges of the
fixed bottom portions, individual runner secured
zontal plane regardless of the relative elevation
of the respective door sections.
30 to said swingipg bottom portions, said runners
including spaced central portions and upturned
6. A mine scoop including side and end Walls,
said side and end Walls being formed with upper
extremities, said extremities projecting beyond
and lower marginal reinforcing portions, down
said end walls and plates ?xed to and overlying.
the projecting portions.
wardly swinging bottom sections hinged inward
of the side walls, runners for said bottom sec
tions including elongated spaced parallel runner
portions and upturned end portions, said up
turned end portions extending beyond the ends
of said scoop and having independent overlying
11. A box type leader for mines comprising side
and end walls, ?xed bottom portions adjacent the
side walls, swinging bottom portions having up
wardly extending end portions hinged to said
?xed bottom portions adjacent their inner edges
40 to provide a, closure between said ?xed bottom
portions, and runners secured to the swinging
having a plurality of horizontally extending
bottom portions, said runners extending longi
downwardly swinging hinged bottom sections, the
tudinally of the bottom and having their extremi
adjacent free edges of said hinged sections over
ties bent upwardly against said upwardly ex
lapping, runners for said sections, said runners “ tending end portions.
being constructed and arranged so that they will
?xed plates.
7. A drag scoop comprising a box like assembly
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