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Dec. 31, 1946.
2,413,448
w. T. HANNA
STOKER CONVEYER
Original Filed Jan. 12, 1940
4 Sheets-Sheet l
- INVENTOR
/% M'Zlz'am Z’ Hanna:
'\
\
BY,
,
,
@MLAG/izvL
I
ATTORNEY
Dec. 31, 1946.
'
'
w. T.’ HANNA
2,413,448 '
STOKER CONVEYYER
Original Filed Jan. l2,_ 1940
4 Sheets-Sheet 2
INVENTOR
William I Hanna
BY
Dec. 31, 1946.
2,413,448
w. 1'. HANNA
STOKER 'CONVEYER'
4y Sheets-Sheet 3
Original Fil'ed Jan. 12, 1940
.
INVENTOR
Wqll'aam
BY
Hanna _
' Dec. 31, 1946.
w. T. ‘HANNA
STOKER _CONVEYER
2,413,448
,
Original Filed‘ Jag, 12; 1940
4 Sheets-Sheet 4
INVENTOR.
WILLIAM T. HANNA
‘
BY
'
441%4/804/
l5 ATTQ QN E
5
L
2,413,448
Patented Dec. 31, 1946
UNITED STATES PATENT OFFICE
2,413,448
STOKER CONVEYER
William Thompson Hanna, Cincinnati, Ohio
Original application January 12, 1940, Serial No.
313,599, now Patent No. 2,351,959, dated June
20, 1944. Divided and this application Decem
ber 29, 1942, Serial No. 470,439.
13 Claims. (0]. 198—15)
1
This invention relates to stokers and more par
ticularly to those adapted for ?ring locomotives.
Stokers of this type have a conduit conveying
system extending from beneath the coal bin on
the locomotive tender up to the ?re box of the
2
of Figure l and showing a mouthpiece of the stoker
adjusted to the left of the vertical medial plane
of the stoker.
,
,
Similar reference characters refer to similar
parts throughout the various views of the draw
ings.
_
locomotive. The discharge end of the conveying
Referring to, Figure 1, part of a locomotive back
system terminates at the ?re box and discharges
head I2 is shown, and grate bars ll inside the
coal through a ?ring opening into the ?re box.
?re box are indicated. In the backhead is a
In such a stoker the conveying system between
the hopper and the discharge end includes a cy 10 ?ring opening I3.
Beneath the coal bin on the tender (and dia
lindrical conduit system and a screw conveyer
grammatically indicated) is located a hopper l.
system operating in the conduit. It is important
Coal is conveyed from the forward end of the hop
that the delivery end of the conduit, which ex
per upwardly through a transfer conduit system
tends up through the floor of the locomotive cab,
take up as little room as possible in the cab. To 15 generally indicated at 2 to distributing apparatus
generally indicated at 3, and described more fully
this end the conveying system extending between
in my copending application, Serial No. 313,599,
the hopper and the ?re box is frequently divided
?led January 12, 1940, upon which U. S, Letters
into universally joined sections, which sections lie
Patent, No. 2,351,959, were issued on June 20,
at an angle to one another. The conveyer screw,
in such circumstances, is made up in sections, 20 1944, of which this present application is a di
vision. As will be described, coal is moved through
joined by universal joints coincident with the uni
the hopper and transfer conduit system by means
versal joints joining the conduit sections. In this
way the conveyer screw system may operate freely
of a series of screw conveyers suitably driven from
a source of engine power including an engine and
Within the angularly arranged conduit.
Also, since the locomotive and the tender are 25 reducing gear train located below the locomotive
subject to angular as well as lengthwise displace
cab and generally indicated at M.
ment with respect to each other, provision must
In the conveying system as shown coal moves
be made in the conveyer system extending be
through a hopper l, beneath the coal bin of the
tween the hopper and the ?re box for such dis
tender, to a downwardly extending discharge
placement. To this end the conduit and con 30 opening in the hopper, whence the coal passes
veyer sections are universally connected when re
through a downwardly extending throat to the
quired and provision is also made for elongation
rearward end of a transfer conduit I8. This con
of the conveyer system.
'
duit I8 extends upwardly and forwardly to an
It is an object of the present invention to pro
elevating conduit I 6 rigidly ?xed to the locomotive.
35 This conduit [6 discharges coal through the ?ring
vide an improved conveyer system.
The invention accordingly consists in the fea
opening 13. The elevating conduit l6 extends up
tures of construction, combinations of elements,
wardly through the cab ?oor at a relatively steep
and arrangements of parts as will be exempli?ed
angle and so occupies little space within the loco
in the structure to be hereinafter described, and
motive cab. By arranging the transfer conduit l 8
the scope of the application of which will be in
in such a manner that it extends upwardly and
dicated in the following claims.
forwardly from below the hopper to the elevating
In the drawings:
conduit, the angle between the conduit 13 and the
Figure 1 is a vertical longitudinal section of a
elevating conduit It is reduced. And, as will be
stoker conveying system embodying the inven
described, the efficiency of the transfer system is
45
tion;
improved.
Figure 2 is a vertical section taken on line 2--2
The transfer conduit 18 is so connected with
of Figure 1;
the hopper that the conduit has both universal
Figure 3 is a horizontal section taken on line
3—3 of Figure 1;
Figure 4 is a detailed vertical longitudinal sec
tion of a modi?cation;
Figures 5 and 6 are vertical, transverse sections
taken respectively on lines 5-5 and, 6-6 of Fig
ure 4; and
and longitudinal movement with respect to the
The conduit I8 is connected with the
50 hopper.
elevating conduit It with a universal joint, gen
erally indicated at 26. Within the conduits l8 and
iii are mounted screw conveyers, respectively
numbered 19 and H, which screw conveyers are
'
Figure 7 is a detailed section taken on line 1—‘l 55 universally joined at a joint, generally indicated
2,413,448
4
at 2!, and through which joint the conveyer I9
upwardly from the rearward end of the conduit
l8. As shown in Figure 3, this upwardly ex
tending throat is rectangular in cross section and
drives the conveyer ll. As will be described, the
rearward end of conveyer I9 is mounted on a
short shaft 22 rotatably mounted on the end of
the conduit l8 but ?xed against axial movement
with respect to the conduit. The conveyer i9 is
driven through this shaft 22.
As described in the above-mentioned patent
as shown in Figure 2 it terminates below the
discharge opening of the tender hopper.
Located within the upwardly extending throat
formed by the walls 3'! and extending upwardly
therefrom is a sealing collar 38 provided with
application, Serial No. 313,599, new U. S. Patent
an outwardly extending flange 39 adapted to .
No. 2,351,959, the upper end of the elevating con
slidably seat against a corresponding ?ange ‘40
extending outwardly from the discharge open
ing 36. The sealing collar is kept in sealing
contact‘with the discharge opening 35 by means
of compression springs 4i between the ?ange
39 and a ?ange .42 provided around the top of
duit section it terminates in a conduit section
l?a, pivoted about an axis 5 5b, and which conduit
section is provided with a mouth Etc. This sec
tion lea may be adjusted about axis iSb to offset
the effect of the screw conveyer H to tend to feed
more coal to one side of the fire .box than ‘to ‘the
the upwardly , extending side walls 31. The
other side thereof.
springs 4H are maintained in position by suitable
The outer shell of the universal connection 20
studs 43 threaded into and extending downwardly
is ?xed with respect to the locomotive and back
from the ?ange 39. This construction serves to
head by a frame construction 26 extending rear 20 provide sufficient free movement in all directions
wardly from the locomotive backhead, so tha
between the upwardly extending throat formed
the riser conduit it has no angular or longi
by the walls 37 and the downwardly extending
tudinal motion with respect to the backhead.
discharge opening 36. The sealing collar serves
Since the conduit l3 is of a ?xed length and
to prevent the escape of dust and the entrance
has only angular and no axial movement with I of foreign material.
respect to the conduit l8, and since screw con
The short drive shaft 22 mounted in the con~
veyer 19 has no axial movement with respect
duit I8 and driving conveyer l9, has ?xed on it
to the conduit E3, the universal joint 2! between
a gear 25, which meshes with and ‘is driven by
the screw conveyers I‘! and 1-9 is always de?nitely
a gear 4'84 shown in dotted lines in Figure 3
located with respect to the universal joint 2!? 30 and housed within a housing 45, carried on
between the conduits l6 and I3, and this loca
the rearward end of conduit i3. The housing
tion is chosen to obtain the most efficient oper
45 is cut away to permit the gears lid and 25
ation of the universal connection 2|.
to mesh. The gear 41! is keyed to and supported
This construction provides for the most efficient
by a drive shaft 46 rotatably supported in suit
operation of the conveyer screws within the trans on (A able journals 4? also carried on the rearward
fer conduit system, and at the same time pro
end of conduit i8. As shown in Figures 1 and
vides for the angular motion which necessarily
3,
the forward end of the shaft 46' has a yoke
is caused to’ take place between the conduits l6
158 universally connected to a telescoping ?oat
and I8 by reason of motion between the loco
ing drive shaft 49 driven by the reducing gear
motive and tender that results from going around
train
and mounted in the locomotive. In this
curves or over uneven track beds.
manner the drive shaft 46 is given free motion
Since the hopper l is rigidly mounted on the
with respect to the power unit I 4.
tender, longitudinal and universal movement is
The screw conveyer within the hopper i is
provided for between the hopper l and the rear
driven in the usual manner from its rearward
ward end .of the transfer conduit IS in the fol
end by gears within the housing 58 which in
lowing manner:
turn are driven by a telescoping shaft 5i con
Referring to Figure 2, the rearward end of the
nected to and extending rearwardly from the
transfer conduit is carried by a saddle 2'! slid
drive shaft 46.
ably mounted in channels 28 formed by upper
Referring to Figures 4;, 5, and 6, another form
and lower angle irons 29 and as secured to and
of universal connection is shown for locating the
extending inwardly from the tender frame 3!.
rearward end of the conduit l8 beneath the
With this construction the saddle 2'! is movable
forwardly and rearwardly with respect to the
hopper.
tender frame, and with respect to the tender
hopper I and thus provides for longitudinal dis
placement between the rear end of conduit 58
Referring .to Figure 4, the rearward end of
the conduit I8 is provided with a ?ange 52 ex
tending around the rearward end of the con
duit, and is provided with a spherically con
toured external surface 53. The forward end of
the tender hopper is provided with a spout 513
opening downwardly and provided with an ex
tension 55 having a spherically contoured inside
and the hopper i.
To provide for universal movement between
the saddle 2'! and the rearward end of the con
duit IS, the saddle is provided with a down
wardly depending apron 32 having internal
spherically contoured surfaces 33. Likewise the
surface 55 adapted to receive the spherically
rearward end of the conduit is has ?ange por
shaped surface .53 of the conduit l8. The ex
tension 55 is broken at 5'! so that it may be
} separated to receive the spherically shaped sur
tions 34 having external spherically contoured
surfaces receivable by the spherically contoured
surfaces 33. In this manner the rearward end
of the conduit is universally supported by the
saddle 21. Overhanging ?anges 35 are provided
to keep the flange 34 riding in its seat.
The passage of coal from the hopper to the
screw conveyer iii in the conduit i8 is provi ed
for by means of a downwardly directed discharge
port 36 provided at the delivery end of the hop~
per I which opens into an upwardly extending
receiving throat formed by walls 37 extending
'
face
53.
gether.
Thereafter it is suitably bolted to
-
A pin -58 extends inwardly from the lower por
tion of the extension 55 and rides in a slot 59 in
the flange .52 to keep the conduit I8 properly
aligned with the extension 55. In this manner
free universal movement is provided for between
the conduit l8 and the tender hopper I, while
providing an unrestricted passage for the coal
from the tender ‘hopper to ‘the conveyer.
2,418,448
5
‘ The screw conveyer 19 at its rearward end is
mounted in a suitable bearing 60 at the rear end
of the conduit and is driven from its rearward
end by a telescoping shaft 6 l , as will be described.
The screw conveyer [9, as shown in Figure 4, is
driven by the telescoping shaft 6| which, in turn,
is universally connected to and driven by a shaft
62 located in a gear housing 63 and driven by a
gear 64, see Figure 6. The gear 64 is driven by
a gear 65 mounted on a shaft 66 suitably sup
ported exteriorly of the tender hopper and driven
by a telescoping shaft 51 extending forwardly to
zontally with respect thereto, bearing surfaces on
said saddle constituting portions of a spherical
surface, and complementary bearing surfaces on
the rear portion of the conduit section engaging
the ?rst-mentioned bearing surfaces and consti
tuting portions of a spherical surface having'its
center on the axis of said conveyer screw,
4. In a locomotive stoker for conveying coal
from a locomotive tender to the ?rebox of the
locomotive, the combination of a hopper ?xed
beneath the tender and having a delivery open
ing, a conduit section for receiving coal from said
delivery opening and conveying it to the locomo
the power unit M. The screw conveyer within
tive, a conveyer screw rotatably mounted in said
the hopper is driven by a gear 68 which meshes
15 conduit section and held against axial movement
with and is driven by the gear‘ 65.
relative thereto, means for mounting the forward
The bottom, rearward portion of the conduit
end of the conduit section on the locomotive for
[8 is cylindrically shaped inside the spherically
universal movement only with respect thereto,
contoured ?ange to provide e?icient coaction be
means for mounting the rear end of the conduit
tween the screw conveyer l9 and the interior of
section on the tender in downwardly offset rela
20
the conduit, to move fuel forwardly from the
tion to the hopper and permitting limited move
lower end of the conduit l8 as the coal is deliv
ments of the conduit section relative to the hop
ered thereto from the tender hopper without in
per both longitudinally and about a center lying
terfering with the universal action of the joint.
on the axis of said conveyer screw, and sealing
As many possible embodiments may be made of
means between said hopper delivery opening and
the above invention and as many changes might
the downwardly o?‘s'et rear end of said conduit
be made in the embodiments above set forth, it
section.‘
'
isto be understood that all matter hereinbefore
5. In a locomotive stoker for conveying coal
set forth or shown in the accompanying drawings
from a locomotive tender to the firebox of the
is to be interpreted as illustrative and not in a
locomotive, the combination of a hopper ?xed
limiting sense.
beneath the tender and having a delivery opening,
I claim:
a conduit section for receiving coal from the de
1. In a locomotive stoker for conveying coal
livery opening and conveying it to the locomotive,
from a locomotive tender to the ?rebox of the 10
a conveyer screw rotatably mounted in said con
comotive, the combination of a conduit section
duit section and held against axial movement
rigidly mounted on the locomotive, a conduit sec
relative thereto, means for mounting the forward
tion rigidly mounted on the tender, a transfer
end of the conduit section on the locomotive for
conduit section intermediate said tender and loco
universal movement only with respect thereto,
motive sections, having its forward end univer
means for mounting the rear end of said conduit
sally connected with the rear end of said loco
section on the tender for longitudinal movement
motive section and its rear end in offset rela
with
respect thereto and also for relative move
tionship with the forward end of said tender sec
ment about a center on the axis of said screw,
tion, and a delivery conduit section pivoted on
and a resiliently pressed sealing collar interposed
the forward-end of said locomotive section and
between the rear end of said conduit section and
adapted for adjusted lateral displacement rela
portions of the hopper adjacent the delivery
tive to the ?rebox to regulate the lateral distri
opening.
bution of the coal to the ?rebox.
6. In a locomotive stoker for conveying coal
2. In a locomotive stoker for conveying ‘coal
from a locomotive tender to the ?rebox of the
from a locomotive tender to the ?rebox of the
locomotive, the combination of a hopper ?xed
locomotive, the combination of a hopper ?xed
beneath the tender and having a delivery opening,
beneath the tender and having a delivery open
a conduit section for receiving coal from said de
ing, a conduit section for receiving coal from said
livery opening and conveying it to the locomotive,
delivery opening and conveying it to the locomo
a conveyer screw rotatably mounted in said con
tive, a conveyer screw rotatably mounted in said
conduit section and held against axial movement
duit section and held against axial movement
relative thereto, means for mounting the forward
relative thereto, means for mounting the forward
end of the conduit section on the locomotive for
end of said conduit section on the locomotive for
universal movement only with respect thereto, a
universal movement only with respect thereto,
saddle mounted on the tender and slidable hori
means for mounting the rear end of said conduit
zontally with respect thereto, and means for
section on the tender for longitudinal movement
mounting the rear end of the conduit section on 60 with respect thereto and also for relative move
the saddle to permit limited movement with re
ment about a center on the axis of said screw, a
spect thereto in all directions about a center lying
sealing ring movably carried by said conduit sec
on the axis of said conveyer screw,‘
tion and having a horizontal ?ange engaging the
3. In a locomotive stoker for conveying coal
hopper adjacent said delivery opening and a ver—
from a locomotive tender to the ?rebox of the
tical ?ange, a throat extending upwardly from
locomotive, the combination of a hopper ?xed
the rear end of said conduit section and loosely
beneath the tender and having a delivery open
receiving said vertical ?ange, and resilient
ing, a conduit section for receiving coal from said
means for pressing said horizontal ?ange toward
delivery opening'and conveying it to the locomo
tive, a conveyer screw rotatably mounted in said -
conduit section and held against axial movement
relative thereto, means for mounting the forward
end of the conduit section on the locomotive for
universal movement only with respect thereto, a
saddle mounted on the tender and slidable hori 75
the hopper.
'
7.vIn a locomotive stoker for conveying coal
from a locomotive tender to the ?rebox of the
locomotive, the combination of a hopper ?xed
beneath the tender and having a delivery open
ing, a conduit section for receiving coal from said
2,418,448
7
delivery opening and conveying it tothe locomo
tive, a conveyer screw rotatably mounted in said
coincident with the universal connection between
said conduit sections.
'
'
r
conduit section and held against axial movement
10. In a locomotive stoker for conveying fuel
relative thereto, means for mounting the forward
forwardly from a tender to a ?rebox of the
end of said conduit section onythe locomotive for C41 locomotive, in combination, a hopper located be
universal ‘movement only'with respect thereto, a
neath the tender and having a curved, down
saddle mounted on the tender and slidable hori
wardly opening delivery spout, a screw conveyer
zontally with respect thereto, bearing surfaces on
in said hopper for moving fuel to said spout, a
said saddle constituting ‘portions of a spherical
cylindrically shaped transfer conduit for de
surface, complementary bearing surfaces on the 10 livering fuel forwardly from said delivery spout
rear portion of said conduit section engaging the
to the locomotive, said delivery spout and said
?rst-mentioned surfaces and constituting por
transfer conduit being provided with male and
tions of a spherical surface having its center on
female spherically shaped surfaces forming a
the axis of said screw, a sealing ring movably
universal connection therebetween, and a trans
carried by said conduit section and having a hori 15 fer screw conveyer ‘Within said transfer conduit;
zontal ?ange engaging the hopper adjacent said
delivery opening and a vertical ?ange, a throat
extending upwardly from the rear portion of said
conduit section and loosely receiving said vertical
?ange, and resilient means for pressing said ring
toward said hopper.
part of said cylindrically shaped transfer con
duit extending within said spherically shaped
surfaces to provide a fuel support for said trans
fer screw conveyer to move fuel forwardly there
through Within the ‘working con?nes of said
transfer screw conveyer.
8. In a locomotive stoker for conveying coal
11. A locomotive stoker comprising, in com
from a locomotive tender to the ?rebox of the
bination, a fuel receiving hopper means adapted
locomotive, the combination of a hopper ?xed
to be supported by a tender, a fuel delivering
beneath the tender, an elevating conduit section 25 means adapted to be supported by a locomotive
?xed to the locomotive for delivering coal to the
to deliver fuel to the ?rebox thereof, a fuel
?rebox thereof, a transfer conduit section for
transfer conduit, and a fuel transfer screw; said
transferring coal from said hopper to said elevat~
transfer conduit being located between said re
ing conduit section, means for universally con
ceiving hopper means and said delivering means,
necting the forward end of said transfer conduit
said transfer screw being located within said
section to. the rear end of said elevating conduit
transfer conduit, said transfer conduit being
section, a saddle mounted 'on the tender and slid
movably connected to one of said means by a
able horizontally with respect thereto, means for
coupling comprising male and female spherically
mounting the rear end of said transfer conduit
shaped surfaces having 'a common center lying
section on said saddle to permit limited move
in the axis of said screw, said transfer screw ex
ment in all directions about a center, a transfer
tending into the interior of said coupling past
conveyer screw rotatably mounted in said trans
said center, and said transfer conduit also ex
fer conduit section with ‘its axis passing through
tending into the interior of said coupling to keep
said center and held against longitudinal dis
fuel passing into the coupling within the bite
placement with respect thereto, and a conveyer 40 of said transfer screw.
screw in said elevating conduit section univer
12. In a stoker for coal ?ring a locomotive, a
sally connected to and driven by the forward end
conduit and screw feed system for conveying coal
of said transfer conveyer screw, the center of the
from a locomotive tender to the ?rebox of the
universal connection between said conveyer screws
locomotive comprising, a hopper located beneath
coinciding with the center of the universal con
said ‘tender, and having a downwardly opening
nection between said conduit sections, whereby
delivery opening, a conveyer screw in said hop
said last-mentioned centers will remain vcoinci
per for moving coal to said opening, a transfer
dent notwithstanding relative displacements of
conduit for receiving fuel from said opening
locomotive and tender in use.
and transferring it forwardly to the locomotive,
9. In a locomotive stoker for conveying coal '
means on said tender for mounting the rear_
forwardly from a, locomotive tender to a ?rebox
ward end of said transfer conduit so that it may
of the locomotive, the combination of a hopper
slide longitudinally and have limited movement
?xed beneath the tender, an elevating conduit
about a center, a chute ?xed to and extending
section ?xed to said locomotive for delivering
upwardly from the rear end of said transfer con
coal to the ?rebox thereof, a transfer conduit
duit to a position beneath said delivery opening
section for transferring coal from said hopper to
for receiving coal therefrom and sealing means
said elevating conduit section, means for univer
received by said chute and spring pressed against
sally connecting the forward end of said transfer
the hopper wall bordering said delivery opening
conduit section to said'elevating conduit section,
for preventing the escape of coal as it passes
a saddle slidably carried by said tender, said sad
from said delivery opening to said chute.
dle having a spherically shaped bearing surface,
13. In a st‘oker for coal ?ring a locomotive, a
a complementary spherically shaped bearing sur
conduit and screw feed system for conveying coal
face on the rearward end of said transfer conduit
from a locomotive tender to the ?rebox of the 10
section cooperating therewith, said spherically
comotive comprising, a hopper located beneath
shaped bearing surfaces permitting relative move—
said tender and having a downwardly opening
ment therebetween about a center, a conveyer
delivery opening, a conveyer screw in said hop
screw mounted in said transfer conduit section
per for moving coal to said opening, a transfer
for rotational movement and held against longi
conduit for receiving fuel from said opening and
tudinal displacement with respect thereto, and a
transferring it forwardly to the locomotive,
conveyer screw in said elevating conduit section
means on said tender for ?exibly connecting the
universally connected to and driven by the for
rearward end of said transfer conduit to the
ward end of said transfer conveyer screw, the
tender, a chute ?xed to and extending upwardly
mounting of said transfer conveyer screw being
from the rear end of said transfer conduit to a
sov constructed and arranged that'the universal
position beneath said delivery opening for re
cmectiml between said screw conveyers is held 7-5 ceiving coal therefrom, sealing means received
2,413,448
9
by said chute and spring pressed against the hop
per wall bordering said delivery opening for pre
venting the escape of coal as it passes from said
delivery opening to said chute, a conveyer screw
in said transfer conduit, means for driving said
transfer conveyer screw including a pinion shaft
mounted on said transfer conduit to move there
10
with, a gear on said pinion shaft and a gear on
the rear end of said transfer conveyer screw
meshing with said gear, means for driving said
pinion shaft and means for driving said hopper
conveyer screw including a drive shaft driven
vfrom said pinion shaft.
WILLIAM THOMPSON HANNA.
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