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Патент USA US2405117

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Aug. 6, 1946.
2,405,11 7'
A. G. DEAN
BOLSTER CONSTRUCTION FOR RAIL CAR UNDERFRAMES
Original Filed Nov. 21, 1941
3 Sheets-Sheet l
k
>
INVENTOR»
?lberi 6. Dean,‘
BY %/4
ATTORNEY
Aug. 6, 1946.
A. G. DEAN
29405,} i 7
BOLSTER CONSTRUCTION FOR RAIL CAR UNDERFRAMES
Original Filed. Nov“ 21 ,
3' Sheets-Sheet 2
1941
[m ;-£I_19______
i
Lli?
INVENTOR
?ber; 6‘. Deal},
» 7"’
f‘
g
ATTORNEY
Aug. 6, , 1946.v
2,405,117
A. G. DEAN
BO'LSTER CONSTRUCTION FOR RAIL CAR UNDERFRAMES
Original Filedv Nov. 21, 1941
3 Sheets-Sheet 3‘
v
a
INVENTOR
* ‘her; 6. Dean,
ATTORNEY
Patented Aug. 6, 1,946
2,405,117
UNITED STATES PATENT OFFICE
'
2,405,117
BOLSTER CONSTRUCTION FOR RAIL CAR
’
UNDERFRAMES
Albert G. Dean, Narberth, Pa., assignor to Ed
ward G. Budd Manufacturing Company, Phila
delphia, Pa., a corporation of Pennsylvania
Original application November 21, 1941, Serial
No. 419,816, now Patent No. 2,331,891, dated
October 19, 1943. Divided and this application
October 15, 1943, Serial No. 506,332
} 13 Claims.
1
The invention relates to a rail car underfraine
and particularly to the bolster construction and
associated parts of such an underframe.
The present application is a division of appll“
cant’s co-pending application Serial No. 419,8l6
?led ‘ November . 21,
1941,
now
Patent
No.
2,331,891, issued October 19, 1943, entitled End
underframe construction for rail cars, which, in
turn, is a continuation-in-part of applicant’s
formerly co-pending but now abandoned appli
cationrserial No. 296,026, ?led September 22,
1939, entitled Rail car underframe.
As in the parent applications, one of the main
(Cl. 105—226)
2
of the underframe and body side walls in ?nal
assembly. It is reinforced in regions of maxi
mum stress, as in the region of the center sill and
in the side bearing regions.
Other and further objects and advantages and
the manner in which they are attained will be
come apparent from the following detailed de
scription when read in connection with the ac
companying drawings forming a part hereof.
In the drawings:
Fig. 1 is a partial transverse sectional view
through the underframe, the section being taken
substantially along the line l—l of Fig. 2, look
objects: of the invention is to provide an under
ing in the direction of the arrows.
frameof the class which, for standard size rail~ 15 Fig. 2 is a fragmentary longitudinal sectional
way cars, is of light weight as compared with
view, the section being taken substantially along
known such underframes and yet one which acts
the line 2-2 of Fig. 1, but the center sill proper
to absorb the heavy draft and buf?ng loads as
being shown in elevation.
well as to take the extremely heavy collision
Fig. 3 is a fragmentary plan view of the bol
shocks incident to railway car operation and 20 ster and associated parts, the side wall post con
which meets with A. A. R. requirements to sub
nected to the bolster being shown in horizontal
stantially the same or even greater degree as pre
vious heavy type underframes.
section.
Fig. 4 is a fragmentary horizontal sectional
‘It is a further object of the inventionto pro
view through the bolster and associated parts,
vide an underframe structure which can be 25 the section being taken substantially on the line
readily assembled in subassemblies by spot weld
4-4 of Fig. 1.
ing, and. which. subassemblies. are. as readily
Figs. 5, 6, and 7 are fragmentary detail sec
joined together in ?nal assembly and to adjoin~~
tional views taken substantially along the lines
ing side and end wall structures of the body, the
5—.—5, 6-—6 and 1-1, respectively, of Fig. 1.
latter also being preferably of light weight con 30 The underframe according to the invention
comprises the center sill proper It extending
1 Tothe end of achieving these objects, substan
through the bolster II' and having the end ex_
tially the entire underframe, including the bol
tensions l2 forming draft gear and buffer pockets
sters, transverse floor beams, longitudinal
between them and overlapping the end of the
stringers, center and side sills and flooring, as :- center sill proper and rigidly secured thereto
wellas the end sills, and the buff and draft gear
and to the bolster. The underframe parts im
housing center sill.extensionsconnecting the end
rnediatel'y associated with the bolster further
sills tothe bolsters and center sill proper are
comprise, the longitudinal ?oor stringers it, the
constructed, in thexmain of light-gauge mem
transversely corrugated flooring It, the side sills,
struction.
'
.
'
.
bers which may be rolled or drawn sections of 40
‘and the side wall posts 16.
'
>
strip stock and which are so formed in their mar
The center sill proper in may comprise, as ap
‘gins as to facilitate joinder to each other and
pears in Figs. ,1, 2, 3, a and 5, a compact columnar
into. the body structure as a whole, as by spot
structure, built up of a plurality of sheet metal
Welding.
;
.
i
sections secured together as by spot welding. It
To this end also, the center sill end extensions 45 is of generally rectangular form and the corners
of theunderframe connecting the end sill to the
of the rectangle are formed by angular forma
bolster and center sill proper, the bolster and the
tions H which provide accessibility for ready at
center sill proper may all be assembled as sepa
tachment'of associated parts thereto. This form
rate subassemblies, the parts of which are so
of sill is fully described and claimed in the pat
formed as to be readily so subassembled and 50 ent above referred to and further description
joined together in ?nal assembly.
_
‘_
thereof except as it enters into'the bolster con
The bolster, in particular, is aseparate sub
structionof the invention, is believed unneces
assembly, preferably of box section form in cross
sary. ‘
section, and so designed as to. facilitate its at
The bolster, as H, is assembled as a separate
tachment in ?nal assembly to the adjacentparts 55 ‘subassembly unit and is built up in the main of
2,405,117
3
angular spaced gussets 30 of substantially the
sheet metal parts. It comprises a box section
structure whose top face is ?at and whose bot
tom face, for some distance inwardly from its
ends, is extended parallel to the top face and
then inclined downwardly toward the center and
provided with a flat portion at the center of
somewhat greater width than the Width of the
center sill, Fig. 1.
height of the central portion of the bolster.
These gussets have vertical ?anges 3| paralleling
the opening l8 and bottom ?anges 32 overlapping
the lower lateral ?anges of the side plates 2| and
are strongly secured to the side plates 2| in their
overlapping body portions by numerous spot
In the lower portion of this
central deepened portion, the bolster is provided
with a rectangular opening H! to receive the cen 10
ter sill.
The box-section of the bolster is comprised, in
the main, of a ?at top plate IS, a flat bottom plate
20 and lateral channel section plates 2|, these
latter being of laterally facing channel cross sec 15
tion with their side walls overlapping the‘top
and bottom plates and secured thereto by spot
welding.
There are four such channel section plates 2|,
and in their central portion they terminate in
their lower portions at the sides of the center sill
receiving opening l8, but at their upper portions,
they are extended inwardly over the center sill
opening to have the upper portions of the two
plates on each side of the bolster terminate in
close proximity adjacent its center, see Fig. 1.
These extended upper portions of the side plates
2| are strongly joined together in each case by a
substantially J-section member 22 overlapping
their inside faces by a wide overlap and secured
thereto by numerous spot .welds. As shown in
Figs. 1 and 2, the bottoms of these J-section mem
bers terminate at the top of the opening l8 which
receives the center sill, overlap the top ?anges
welds, see Fig. 1.
In the angle of their lower margins, the side
plates 2| are further reinforced by an angle 33
nesting with the angle formed by the body of each
gusset 30 and its bottom ?ange 32. In these re
gions of quadruple thickness sheet metal is se
cured the center plate casting 34 of the bolster,
as by riveting, as shown at 35, through the four
thickness of metal and an overlapping portion
of the casting. Since the center plate casting
spans the opening |8 in the bolster, and is
strongly secured to the reinforced structure just
described at the opposite sides of the opening, the
entire bolster structure is strongly tied into the
center plate. The casting 34 has spaced lateral
extensions, as 36, overlapping the bottom ?anged
portions of the respective center sill en'd exten
sions |2 and securely riveted thereto to provide a
strong connection of the bolster with the bottom
portions of said extensions, see Fig. 4.
At the sides, the opening l8 of the bolster is
further reinforced by vertical plates 31 overlap:
ping the vertical ?anges 3| of the gussets 30 and
30
secured thereto. To these plates 31 are further
secured at the four corners of the opening the
angles 38 spot welded thereto through their ver
tical arms. These angles preferably extend some
35 distance beyond the opposite sides of the bolster
and form ?nal assembly joints for securing ‘the
center sill proper l0 to the bolster. When the
ll of the sill and are secured thereto in the
overlap.
The outer ends of the side plates 2| are. ex
bolster is telescoped over the center sill in the
tended at their ends beyond the top and bottom
?nal assembly, the angular corner portions ll
plates to overlap the side walls of channel sec
of the sill |0 overlap or nest with the angles 38
tion posts, as It, of the side walls, to which they 40 and are secured thereto in the overlaps by spot
are secured in ?nal assembly as by spot welding.
welding, see Figs. 1 and 5.
; - ,
Additional reinforcement and provision for se
The top of the bolster II is arranged substan~
curement to the side wall posts -is provided by a
tially in the plane of the ?ooring and at the top,
channel member 24 telescoped between the side
the bolster» may have its side plates formed with
plates 2| and having its bottom wall in position
cut out openings, as 39, at spaced locations, see
to overlap the bottom wall of the post, this chan
Fig, 1, and reinforced below said openings by
nel being, in ?nal assembly, spot welded'to the
angles, as 40, extending substantially the length
bottom wall of the adjacent post l6 and to the
of the bolster.
.
,_ ,
side plates 2| in the subassembly of the bolster.
These cut out openings receive, in the‘ sub
It is desirable to strongly reinforce the bolster 50 assembly of the bolster, short channels 4| extend
against buckling in the region where the hori
ing beyond the inner and outer faces of thebol
zontal side portion of its bottom wall merges with
ster and secured to the angles 40, and the top
the downwardly inclined bottom of the central
?anges of the side plates 2|, through their side
portion, adjacent the region where the usual side
walls, the extended portions serving as ?nal 'as
bearing as 25 is provided. To this end, there is
sembly joint parts to connect the ?oor stringers,
provided at this point a strong inner reinforce
as l3, see Figs. 2, 3 and '7. At the center, see Figs.
ment which may consist'of two channels 26 and
2 and 5, the two central members 4| overlap in
21 welded to an intermediate ?at strip 28, which
?nal assembly the respective center sill end ex
directly abuts the bottom 'wall of the bolster at
tensions l2 and are strongly spot welded thereto,
this point. The side walls of the channels 26 and 60 to tie the bolster to the center. sill end extensions
' 21 telescope between the side‘ plates 2| of the
adjacent the ?oor level. These end extensions
bolster and are strongly secured thereto by‘nu
may additionally be tied to the bolster by gussets
merous spot welds.
"
' '
'
'
as 42, see Fig. 2, overlapping the vertical ?anges
' Since the side bearing, as 25, is secured adja
3| of the gussets 30 and the adjacent center sill
cent this region by bolting it to the laterally ex
end extensions |2 and strongly spot welded to
tending flanges formed by the side plates 2| and
bottom plate ISL'these ?anges are further rein
each.
For the last stringer l3 at the side,.th'e
.
cut out
forced in this region by angle'me'mbers 29 spot
opening is not provided to avoid weakening of
welded through one of their arms'to the adjacent
the bolster in this region of connectionto the
side plate ‘2| and through the other of their arms '
through the adjacent laterally extending‘~ ?ange
through which the securing bolts extend,'see
Fig. 1.
V ‘ '
At each side of the opening |8 receiving the _
center sill the bolster is further reinforced by tri
side wall of the body. At this location. the con
struction is that shown in Figs. 1 and 6. An out
wardly facing channel 43 is secured to the angle
40 and the adjacent-top ?ange of the adjacent
side-plate of the bolster and a-shortl'channel, as
n-
2,405,117
5
4'4,‘ is telescoped into this channel and secured
to its side walls, this channel projecting, like the
channels 4!, to serve as ?nal assembly joint parts
6
5. In a rail car underframe, a box cross-sec
tion bolster fabricated of sheet metal members,
including top and bottom through running mem
bers and side members of varying vertical depth
floor stringer I3.
7
5 interconnecting said top and bottom members,
After the bolster subassembly has been as
the central portions of said side members being
sembled with the center sill proper and its end
on the bolster to secure the adjacent ends of a
extensions as already described, the side wall sub
assembly, with its posts l6 and side sills l5 may
deepest and provided with an opening in their
lower portions for the passage of a center sill
be brought into place and secured thereto, by 10 therethrough, reinforcing elements for said side
members extending respectively, across the top
having the side sill overlap the top of the bolster
and sides of said opening and some distance there
side walls of
beyond at top and sides to provide wide overlaps
The transbetween said elements and the side members
then be laid
I3 and side 15 and, at the top, between said top and side rein»
forcing elements, and a center plate bridging said
sills [5.
opening and secured to the reinforced side mem
From the foregoing description, it can be seen
bers on opposite sides thereof.
that the bolster can be readily assembled as a
6. A ‘bolster subassembly for rail car under
subassembly unit, adapted to be readily joined in
?nal assembly to the center sill and center sill 20 frames having its top arranged substantially in
and the posts secured between the
the‘ bolster as already described.
versely corrugated flooring 14 may
over and secured to the stringers
end extensions by strongly reinforced joint struc
tures and also to the longitudinal ?ooring string~
ers and side wall subassemblies.
It is also seen
that the bolster, except, for the center plate and
side bearing castings is fabricated entirely of
sheet metal members of relatively light gauge
material so that an exceedingly light but strong
bolster structure results.
the plane of the floor and laterally flanged, the
bolster being cut out at spaced locations below
said ?ange and reinforced by an angular member
secured below said out out portion and paralleling
said lateral ?ange, and angular strips passing
through said out out portions and projecting at
the opposite sides of the bolster, said strips being
secured both to the lateral ?ange and said angu
lar reinforcing member paralleling the ?ange.
What is claimed is:
'7. A bolster subassembly for rail car under
1. In a rail car underframe, a bolster having 30
frames, comprising a box cross-section beam,
a vertically deepened central portion, said bolster
deeper at the center than at its ends and fabri
being a box cross-section fabricated of sheet
metal, the side walls being outwardly facing chan
nels and the top and bottom walls being con
tinuous ?at strips overlapping the side Walls of
the channels and secured thereto, the side walls
cated of through running top and bottom mem
bers interconnected by laterally facing channel
side members, the side members being formed
with an opening in the lower central portions
thereof for the passage of a center sill, reinforce
being continuous in the upper portion but dis
ments for said side members ?anking the sides
continuous in the lower portion of the bolster
and top of said opening, and a center plate bridg
to provide an opening for the extension of a cen
ter sill through the bolster, and reinforcing mem 4-0 ing the opening and secured at opposite sides of
said opening to said reinforced portions ?anking
bers for said side walls extending around the
the sides of the opening.
8. A bolster for rail car underframes, compris
ing a box section beam of greater depth centrally
cross-section fabricated of ?at top and bottom 45 than at its sides and including ?at top and bot
tom members interconnected by channel section
plates and outwardly facing channel side plates
secured through their ?anges to the top and bot
side members, the side members being formed
with an opening in their lower portions for re
tom plates, the bolster side walls being cut away
ceiving a center sill therethrough, reinforcing
in their lower central portion to provide an open
ing to permit the passage through the bolster of 50 members connected to said side members above
a center sill, and reinforcing members ?anking
said opening and extending a substantial distance
said opening including means for attachment to
on each side thereof, and further reinforcing
the center sill in final assembly.
members ?anking the sides of said openings and
extending into overlapping relation with the re
3. In a rail car underframe, a bolster having
its top arranged substantially in the plane of the 55 inforcing members extending above said opening.
sides and top of said opening and including
means for attachment to the center sill.
2. In a rail car underframe, a bolster of box
floor and having transversely spaced, longitudi
nally extending openings therethrough adjacent
its top, spaced angular strips extending through
9. In a rail car underframe, a bolster of hollow
cross-section fabricated of top and bottom plates
and outwardly facing channel side plates secured
the openings, in the bolster below its top, secured
through their ?anges to the top and bottom plates,
thereto and projecting from its opposite faces to 60 the bolster side walls forming an opening in the
provide means for attaching longitudinally ex
lower central portion of the bolster to permit the
tending stringers of the underframe to the
passage through the bolster of a center sill, and
bolster.
reinforcing members ?anking said opening in
4. In a rail car underframe, a box cross-section
cluding means for attachment to the center sill
bolster fabricated in the main of sheet metal 65 in ?nal assembly.
members, comprising top and bottom through
running members and side members of varying
10. In a rail car underframe, a hollow cross
section transverse bolster beam, deeper at the
vertical depth interconnecting said top and bot
center than at its ends and fabricated of through
tom members, the central portions of said side
members being deepest and provided with an 70 running top and bottom members interconnected
by laterally facing channel side members, the side
opening in their lower portion for the passage of
members providing an opening in the lower cen
a center sill therethrough, reinforcing members
tral portions of the beam for the passage of a
for said side members, ?anking the top and sides
center sill, reinforcements for said side members
of said opening and providing ?nal assembly joint
?anking
the sides of said opening, and a center
parts for attaching the bolster to the center sill.
plate bridging the opening and secured at oppo
8
site sides of said opening to said reinforced por
tions ?anking the sides of the opening.
11. In a rail car underframe, a bolster having
a vertically deepened central portion, said bolster
being a hollow section fabricated of sheet metal
and having side walls in the form of outwardly
facing channels and a bottom wall in the form
of a continuous ?at strip overlapping the side
sill therethrough, reinforcing elements for said
side members extending, respectively, across the
top and sides of said opening and some distance
therebeyond at top and sides to provide wide
overlaps between said elements and the side
members and, at the top, between said top and
side reinforcing elements, and a center plate
bridging said, opening and secured to the rein
forced side members on opposite sides thereof.
13. A bolster for rail car underframes, com
walls of the channels and secured thereto, the
side walls being continuous in the upper portion
prising a hollow-section beam of greater depth
but discontinuous in the lower portion of the
centrally than at its sides and including a bottom
bolster to provide an opening for the extension
member interconnecting channel-section side
of the center sill through the bolster, and rein
members, the side members forming an opening
forcing members for said side walls extending
in the lower portion of the beam for receiving a
around the sides and top of said opening and in 15 center sill therethrough, reinforcing members
cluding means for attachment to the center sill.
connected to said side members above said open
12. In a rail car underframe, a hollow cross
section bolster fabricated of sheet metal mem
bers, including a bottom through-running mem
ber and side members of varying vertical depth
interconnected by said bottom member, the cen
tral portions of said side members being deepest
and interrupted at least in their lower portions
to provide an opening for the passage of a center
ing and extending a substantial distance on each
side thereof, and further reinforcing members
?anking the sides of said openings and extending
into overlapping relation with the reinforcing
members extending above said opening.
ALBERT G. DEAN.
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