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Патент USA US2412408

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Dec. 10,1946.
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' ‘E.MARTl‘N
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2,412,408
FU'EL RECEIVING AND CONVEYING APPARATUS
‘Filled Dec. 29, ‘1944
4 Sheets-Sheet 1
/5
INVENTOR.
E. MARTIN
' mums
FUEL RECEIVING AND CONVEYING #XPPARATUS
Filed‘Decv. 29', 1944
4 Sheets-sheaf 2
IN VEN TOR. _
E1765”; w???”
BY
10% gé/adéa/
Deul?, 194$.
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E. MARTIN
‘
2,412,48
FUEL RECEIVING AND CONVEYING APPARATUS
Fiie'd Ded. 29, .1944
-
4 Sheets-Sheet s
1N VEN TOR.
i’J-GE/VE M49774’
Dec. 10,’ 1946.
2,412,468
E. MARTIN
FUEL RECEIVING AND CONVEYING APPARATUS
.
Fi'led Dec. 29, 1944
‘
4 Sheets-Sheet 4
Patented Dec. 10, 1946
2,412,408
UNITED STATES PATENT OFFICE
2,412,408
FUEL RECEIVING AND CONVEYING
APPARATUS
Eugene Martin, Wesleyviile, Pa., assignor to The
Standard Stoker Company, Incorporated, a cor
poration of Delaware
Application December 29, 1944, Serial No. 570,255
10 Claims. (Cl. 198—15)
2
.I.
This invention relates to material conveying
Other advantages of the invention will be ap
parent to those skilled in the art- from the follow—
ing description when read in connection with the
mechanism and is particularly directed to an im
proved fuel conveying unit of a locomotive stoker
accompanying drawings, wherein
for installation in a tender having a long fuel
Figure l is a View in side elevation of a ‘com
bin.
plete stoker embodying the novel tender unit, the
In order to minimize the stops necessary for re
stoker being shown as applied to a locomotive‘ and
plenishing the coal supply of a locomotive, it is of
tender.
course necessary to increase the coal carrying
Figure 2 is a plan view of the novel tender unity
capacity of the locomotive tender. Road clear
ances, tunnels, etc., limit the width and height of 10 of the stoker;
Figure 3 is a sectional view taken on the line
the tender fuel bin, so that additional coal space
3-3 of Figure 2;
can only be provided by lengthening of the tender
Figure 4. is a sectional view taken on the line
fuel bin. Lengthening of the stoker trough, which
li—4 of Figure 2;
underlies the fuel bin floor, to make avail
Figure 5 is a side elevation of the rear end of
able the increased coal capacity of the lengthened 15
the stoker tender unit with the sidev of the gear‘
fuel bin, presents a number of problems in the
housing removed to show the gearing;
conveyance of the fuel.
Figure 6 is a rear end view of the stoker tender
This invention has for its main object, there
unit with the gear housing cover removed to show
fore, the provision of an improved tender unit of a
the gearing in the gear housing; and
stoker that will effectively receive and convey
Figure '7 is a sectional view on the line T—‘l of
substantially all the coal of a locomotive tender
having an unusually long fuel bin.
Figure 2.
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Referring to Fig. 1, the letter L designates a lo
In the usual type of stoker tender unit for ap
comotive, T a tender and. S a stoker for delivering
plication to tenders having fuel bins of normal
length, a screw of one piece construction supported. 25 fuel from the tender to the locomotive. The
locomotive and the forward end of the stoker are
at its rearward end in a bearing is employed. In
not shown in the remaining ?gures, since the
a tender having a fuel bin that is unusually long,
invention resides in the tender unit of the stoker.
it is not feasible to merely lengthen the screw
The stoker front end arrangement of Fig. l is
conveyor, since the greater the length of the
shown for purpose of illustration only and any
screw conveyor the greater will be the swinging
of a number of stoker front end arrangements,
movement of the free front end of the screw
well known in the art, may be used in con
conveyor, which if not con?ned within certain '
junction with my novel stoker tender unit.
limits, causes the front end of the screw conveyor
The tender T is provided with a frame it and"
to be caught in the crusher causing damage to
either or both or interrupting operation of the 35 a fuel bin I I, the latter having a floor l2 in which
stoker.
Various sectional screw arrangements ‘and
trough constructions have previously been sug
gested and it is a further object of the invention
to provide an improved construction, employing 40
o?lset screw conveyors and troughs, which is
simple in construction, easily installed, sufficiently
compact to readily fit between the fuel bin floor
and tender frame of the tender, provides ample
bearing means for the screw conveyors, with a
minimum restriction to passage of the fuel, and
makes possible the use of screw conveyors of a
length not in excess of that determined by practice
to operate satisfactorily without bending or break—
mg.
It is a further‘ object of the invention to provide
a novel elongated hopper construction having off
set troughs, that combines“ rigidity along with
compactness and lightness to a greater extent'
than previous hoppers of comparable length,
is formed a longitudinally elongated opening l3
extending substantially the length of the fuel
bin and preferably centrally between the sides
thereof. A plurality of shiftable plates I4 con.
trol the effective size and the location of the
opening it whereby varying amounts of fuel may
be delivered by gravity from the fuel bin H to
the stoker hopper H5. The stoker hopper I5‘ is
mounted in the space between the tender frame
Hi and the fuel bin floor l2 and extends longi
tudinally beneath the opening therein substantial
ly the full length of the fuel bin floor, with its
longitudinal axis preferably coinciding with the
central vertical longitudinal plane of the tender.
rI'he forward floor portion it of the hopper I5 is
shaped to form a trough II’, the longitudinal axis
of which is in the vertical medial plane of the‘
hopper. The rearward floor portion it; of the
hopper i5 is offset above the level of the forward
55 floor portion it, and is shaped to form a trough
2,412,408
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l9 the longitudinal axis of which is parallel and
As best shown in Fig. 4, the bearing49 is pro
offset to one side of the vertical medial plane of
vided on its base with the depending guide means
the hopper I5.
59 extending through registering. openings 5| and
The hopper I5 is preferably of built-up con
52, respectively, in the side wall of trough i1 and
struction including the front casting 29, an inter
mediate casting 2|, a rear casting 22 and bent
sheet metal plates forming the troughs l1 and
I9 proper, suitably secured to the castings 29, 2|
and 22. It is apparent that the hopper may be
formed as an integral unitary casting or built up
in any suitable manner if desired.
bracket 53, the latter beingformed integral with
intermediate casting 21. The guide means 59
extending through openings 5| and 52 prevents
movement of the bearing 49 with respect to the
trough l'l except in a direction perpendicular to
10 the plane of the sidewall of trough l1 against
which the bearing seats. The extent of such
Fuel is conveyed through the hopper l5 by
> movement and the force necessary to produce .
screw conveyors 23 and 24 mounted, respectively,
it, is governed by a plurality of springs 54. The
in the troughs l1 and I9. Since the bottom wall
springs 54 are mounted on bolts 55 which extend
portions l5 and N3 of the hopper I5 are shaped 15 through the bosses 55 of the bearing 49, the side’
to form o?set troughs I‘! and 19, as previously
wall of trough l1 and bracket ‘53, and whose
described, and the screw conveyors 23 and 24
heads seat on the bosses 55. The springs 54 seat
are mounted in the troughs, it is apparent that
at one end against the bracket 53 and at their
they are also offset with respect to each other,
other ends against disks, ‘I6 held on the bolts 55
the axis of the screw conveyor 23 being in the 20 by means of nuts 5‘! screwed on the ends of
medial vertical plane of the hopper l5 as well
bolts 55.
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as in the medial vertical plane of the tender,
With the bearing 49 for the forward endrof.
and the axis of the screw conveyor 24 being par
screw conveyor 24 yieldable as described, if any
allel and offset to One side and above the axis
foreign body or congestion of coal is encountered;
of the screw conveyor 23.
25 by the screw conveyor 24, the incidental shock
The screw conveyors 23 and 24 are driven from
will not be sudden and hence violent but will be
their rearward ends through suitable gearing dis
posed in the gear housing 25 which is preferably
gradual and hence absorbed and undue‘ strain on
the stoker will'be avoided; The yieldability of -
formed as part of the rear casting 22. The mech
the bearing 49, or in other words, the resistance
anism for driving the screw conveyors comprises 30 encountered by the screw conveyor 24 necessary
the driving engine 26 which is connected with
to effect movement of thebearing 49, may be ad'- the reduction gearing in gear housing 25 through
justed by manipulation of nuts 51.
a system of connected drive shafts, including the
Fuel delivered to the screw conveyor'23 by‘ the
telescopic shaft 21, shaft 28 and shaft 29, the
screw conveyor 24, or delivered directly thereto
latter being mounted in the gear housing 25 35 from the fuel bin II through the opening I3. is
and journaled in bearing 30 formed with rear
conveyed forwardly and discharged through fuel
casting 22 and a bearing (not shown) formed on
outlet 58 in the front wall 59 of'the hopper l5
the inside of gear housing cover 3|. The shaft
and trough IT. The front wall 59, which is'pref~
28 is journaled in bearings 32 and 33 formed, re
erably formed integral with front casting 25,‘has
spectively, with the front and intermediate cast 40 a crusher 50 secured thereto arching over the
ings 29and 2|. While the driving engine 26 is
screw conveyor 23 for reducingoversize lumps
of fuel.
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shown (Fig. 1) mounted on the locomotive, it is
evident thatit may be mounted on the tender in
From the hopper l5, fuel is. conveyed forwardly
a manner well known in the art.
'
to the ?rebox 5| of the locomotive L through a'
Referring particularly to Figures5 and 6, the
' system of conduits including a short conduit sec
drive shaft 29 is provided with a pinion 34 mesh
ing with reduction gear 35 which is mounted on
intermediate shaft 35. Intermediate shaft 39 is
also provided with a pinion 31 which in turn
meshes with reduction gears 38 and 39 mount
ed, respectively, on driven shafts 49 and. 4|. Shaft
40 is journaled in a bearing 42 formed with rear
casting 22 and a bearing (not shown) formed on
the inside of gear housing cover 3|, and is op
eratively connected with screw conveyor 24. Shaft
4| is journaled in bearing 43 formed with rear‘
casting '22. and bearing 44 formed in gear hous
tion .62 forming‘ a hollow spherical shell ‘which
is received in a spherical portion 53 at the'rear- .
ward end of the telescopic intermediate conduit .
64.
At its forward end the telescopic interme
diate conduit 64 carries a hollow spherical ball
65 received in the spherical clamp 65 which is
- carried by the lower rearward end of the dis
charge conduit 61' Fuel discharged from the
delivery end of conduit 91 through the ?ring
opening in the locomotive boiler backhead 99 is
projected and distributed over the ?rebed by
suitable means well known in the art.
In devising a tender unit of a‘ locomotive stoker
screw conveyor 23 through the shaft 45 and the
for application to a'tender having an unusually
shaft 46 which latter shaft extends longitudinal 60 long fuel bin a great many factors must'be con
ly beneath the trough l9. The shaft 45 is jour-l
sidered and numerous problems must be solved;
naled in bearing 41 which is formed in the upright
Such a construction should make all the fuel in wall 48 of the intermediate casting 2|. The up
the bin available to the conveying system; it must
ing vcover 3i, and is operatively connected with
right wall 48 forms the rear wall of trough ll.
be made su?iciently compact to ?t in the limited
space available between the fuel bin ?oor and
the frame of a tender; it must eliminate the pos
sibility of the forward end of the screw convey
'
The forward end of screw conveyor 24' projects
into the rearward end of the trough l 'l and over
laps the rearward end of screw conveyor 23 for’
a distance approximating one full turn of the
screw ?ight. Fuel is thus conveyed by screw
or from becoming caught by the crusher as 00- '
curs when an exceedingly long screw conveyor ‘
conveyor 24 into the trough I 1 and spills 1aterally
is provided at its rear end only with a, bearing,
and downwardly onto the screw conveyor 23. The
screw conveyor 24 is supported at its forward
end in the bearing 49 which is mounted on the
side wall of the trough l‘! in the manner @Q be '
tweenthe ends of the screw conveyonrestriction‘
of the free passage of the fuel must be avoided;
From the foregoing description it will be appar
described.
.
. 75
and if additional bearing means is provided be- 7
ent that the various problemsinvolved in pro-ll
2,412,408
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5
viding a practical‘ and desirable tender unit of
a Stoker for application :to a tenderihaving an
unusually long fuel bin have been effectively
solved.
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Throughout the foregoing description, where
of said rearward screw conveyor being offset from
ithereceiving end’of' said forward screw conveyor,
and ‘the .flightof said?rearw'ard screw conveyor
overlapping the flight of saidforward screw con
veyor for a distance approximately equal to the
pitch of said-screw conveyors, means for driving
a long hopper is referred to, one in excess of ap
said rearward screw conveyor ‘from its rearward
proximately 170.inches is intended, since in ex
end, and a bearing for the forward end of said
cess of this length the dif?culties and problems
rearward screw conveyor, said bearing being
described are generally encountered. However,
my construction may with advantage be incor 10 yieldable out of its normal position and elastical
ly held against such yielding.
'
porated in hoppers less than 170 inches without
6. In a locomotive stoker, in combination, a
departing from the scope of the invention.
tender hopper adapted to be located beneath
I claim:
the fuel bin of the tender, a forward and rear
1. A material feeding hopper of elongated
ward screw conveyor in said hopper, the delivery
shape provided in one end wall with a discharge
end of said rearward screw conveyor being olf
opening, one portion of the bottom wall of said
hopper remote from said end wall being shaped
set laterally and vertically from the receiving
to form a conveyor trough terminating at its de—
livery end short of said end wall, said conveyor
trough having its longitudinal axis offset at, its
delivery end to one side of the longitudinal axis
of the hopper, and another portion of the bot
tom wall of said hopper between said end wall
and said conveyor trough being offset below the
level of said ?rst named bottom wall portion
and shaped to form another conveyor trough
having its longitudinal axis in the vertical me
dial plane of the hopper, said troughs being in
communication for the passage of material from
end of said forward screw conveyor, means for
driving said rearward screw conveyor from its
rearward end, and a bearing for the forward end
of said rearward screw conveyor, said bearing be
one to the other.
2. In a locomotive stoker, in combination, a
tender hopper adapted to be located beneath
the fuel bin of the tender, one portion of the bot
tom wall of said hopper being shaped to form a
conveyor trough having its longitudinal axis offset
at its delivery end to one side of the longitudinal
axis of the hopper, another portion of the bot
tom wall of said hopper being offset below the
level of said ?rst named bottom wall portion and
shaped to form another conveyor trough having
its longitudinal axis in the vertical medial plane
of the hopper, a screw conveyor in each trough,
and means for driving said screw conveyors
from their rearward ends.
3. In a locomotive stoker, ‘in combination, a
tender hopper adapted to be located beneath the
fuel bin of the tender, the rear portion of the
bottom wall of said hopper being shaped to form
a conveyor trough having its longitudinal axis
offset at its delivery end to one side of the lon
gitudinal axis of the hopper, the front portion
of the bottom wall of said hopper being offset
below the level of said ?rst named bottom wall
portion and shaped to form another conveyor
trough having its longitudinal axis in the ver~
tical medial plane of the hopper, a screw con
veyor in said rearward trough terminating at its
forward end adjacent the adjoining ends of said
troughs, and a screw conveyor in said forward
trough.
‘i. In a locomotive Stoker, in combination, a
tender hopper adapted to be located beneath the
fuel bin of the tender, a forward and rearward
screw conveyor in said hopper, the delivery end of
said rearward screw conveyor being offset from
the receiving end of said forward screw conveyor,
means for driving said rearward screw conveyor
from its rearward end, and a bearing for the for~
ward end of said rearward screw conveyor, said
bearing being yieldable out of its normal position
and elastically held against such yielding.
5. In a locomotive stoker, in combination, ,a
tender hopper adapted to be located beneath the
fuel bin of the tender, a forward and rearward
screw conveyor in said hopper, the delivery end
ing yieldable out of its normal position and elas
tically held against such yielding.
'7. In a locomotive stoker, in combination, a
tender hopper adapted to be located beneath the
fuel bin of the tender, said hopper having com
municating rearward and forward troughs, said
rearward trough being shallower than said for
ward trough, a screw conveyor in said forward
trough, a screw conveyor in said rearward trough,
means for driving said last named screw conveyor
from its rearward end, and a bearing for the
forward end of said last named screw conveyor,
said bearing being yieldable out of its normal
position and elastically held against such yield
mg.
8. In a locomotive stoker, in combination, a
tender hopper adapted to be located beneath the
fuel bin of the tender, said hopper having com
municating rearward and forward troughs, the
longitudinal axis of said rearward trough at its
delivery end being offset laterally and verti
cally with respect to the longitudinal axis of
said forward trough at its receiving end, a screw
conveyor in said forward trough, a screw con
veyor in said rearward trough, means for driving
said last named screw conveyor from its rear
ward end, and a bearing for the forward end of
said last named screw conveyor, said bearing be
ing yieldable out of its normal position and elas
tically held against such yielding.
9. In a locomotive stolrer, in combination, a
tender hopper adapted to be located beneath the
fuel binrof the tender, said hopper having com
municating rearward and forward troughs, the
longitudinal axis of said rearward trough at its
delivery end being offset laterally and verti
cally with respect to the longitudinal axis of
said forwardtrough at its receiving end, a screw
60 conveyor in said forward trough, a screw conveyor
in said rearward trough extending a short dis
tance into said forward trough, means for driv
ing said last named screw conveyor from its
rearward end, and a bearing for the forward end.
of said last named screw conveyor mounted in
the rearward portion of said forward trough,
said bearing being yieldable out of its normal '
position and elastically'held against such yield
mg.
10. A material feeding hopper of elongated
shape having front, rear, bottom and side walls,
the upper edges of said front, rear and side
walls de?ning a rectangular open mouth for said
hopper, one portion of the bottom wall of said
hopper remote from said front wall being shaped
2,412,408
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to form ,a conveyor trough terminating at. its
delivery end short of said front wall and. having
its longitudinal axis parallel and offset to one
' side of the longitudinal vertical medial plane of‘
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'?rst named bottom "wall portion and shaped-to
form another conveyor trough having its longi-'
tudinal axis in the longitudinal vertical medial
plane of the mouth of said hopper, said troughs
the mouth of said hopper, and another portion‘ 5 being in communication for the passage of maof said bottom wall between said front wall and
terial from one to the other.‘
said trough being offset below the level of said
EUGENE MARTIN; I‘
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