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Патент USA US2131537

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Sept. 27, 1938.
2,131,537
J. C. MARIS
STEAM DOME
Filed March 4, 1957
Ill
ve
I8
BY
,4 @,yl.
A TORNEY
Patented Sept. 27, 1938
pruritov STATES
2.131.537> "
:STEAMDOME
4James C. Maris, Glenolpdeny’l’la.
_.
_
`'Application March 4,.1937-,-SerialïNo.z 129.10295 Y:
7 Claims. (el. 12a-_50st,
This invention relates generally to a combined v
dome and dry pipe arrangement for steam loco
motives, and itis one object of my invention to
provide an improved dome that is relatively shal
‘I from which the websdepend with 'an inwardly 1
extending wide 'arcIZ to'apoint inside of the'
boiler.-` These webs-fare therebyrecessed on their
UI low but of large area and is so constructed and « outer edges. " To-further strengthen thisrweb con
arranged as to have great strength together with struction, a circular radial Vflange I3 connects 5 lit
requiring an opening in the boiler shell of» less > the lower ends ofthe webs-while a -substantially ~
cylindricalï’althou’glí slightly lconical voutlet pas
area than that of the dome.
sage wall-»I4 extendsYfrom-ïflange Y I>3» upwardly to
While a great many dome and dry pipe ar
10 `rangements have heretofore been proposed and a curvedsurface I5; «'This'lsurface' extends hori
used, yet for the most part they have requiredr -. zontally between the `successive webs at a point 10#
either excessive heightv which makes them un-` substantially-midway between "the outer surface of thef‘boil'erlshellïand 'the-innersurface ofthe
suitable for large diameter boilers, or they are ‘ ñattop-'L
kAnyusual type ofsteam pipe I6' and
complicated in structure or require an excessively
.large opening in the boiler shell. My present in
vention overcomes these objections to the prior
art arrangements as will be more readily appre
ciated from the following description of the ac~
20
companying drawing in which:
Fig. 1 is a side elevation of a front portion of
a locomotive embodying my improved dome;
Fig. 2 is a transverse section taken on the line
2-2 of Fig. 1;
Fig. 3 is a vertical section taken on the line
3_3 of Fig. 2.
In the particular embodiment of the invention
such as is disclosed herein merely for the pur
pose of illustrating one specific form among pos
sible others that the invention might take in
30 practice, I have shown in Fig. 1 a locomotive
which can be of any conventional type having a
boiler I and a steam dome 2 from which dry
steam is conducted through a pipe 3 to sets of
cylinders 4 and 5. The particular locomotive
shown is of the four-cylinder type which neces
sarily involves a relatively large boiler. Such
large boilers present the serious problem of
maintaining the overall dimensions of the loco
motive within the fixed clearances defined by ex
40 isting railroad standards.
To permit the use of a large size boiler within
the clearance limits, I have provided an improved
shallow dome without sacriñcing the effective
area thereof and without involving a large open
ing in the boiler shell to receive the connecting
pipe. The dome consists preferably of a casing
having a flange 6 conforming to the cylindrical
shape of the boiler and a relatively flat top 'I
which is provided with a depressed portion 8 for
50 receiving an inspection plug 9. The dome is sub
stantially circular in plan view and non-circular
in vertical section. The dome is of very appre
ciable diameter and to prevent upward bulging of
the ñat top l, I provide a series of vertical webs
55 Iû connected to the dome side walls Il and top
elbow` I1 may-be connectedëtof the flange I3 by
usualbolts-Iß’f'ï'f
--
ï‘
"
~
’
f
_
’
As fla. `-»res'ultï of the" dome yconstruction >herein
disclosed, it is seen that the opening-»lef inthe
boiler shell is of appreciably smaller diameter
than the inside diameter of dome 2, thereby in
suring maximum strength of the boiler notwith- 20
standing that a relatively large dome is employed.
Also, and notwithstanding the relatively shallow .
depth of the dome, it is seen that a maximum
passage area leads up to the top of the dome
and thence downwardly over the edge _I5 to the 25
steam pipe. These improved results are ob
tained in a dome of maximum'strength due to
the cooperative relation between the series of ver
tical webs- I0, the ñange I3 and the passage wall
I 4 whereby the webs are positively held against 30
inward movement as the steam pressure is ex
erted against the relatively flat top 'I.Y As a con- '
sequence, the top 1 is prevented from any tend~
ency to bulge out.
From the foregoing disclosure, it is seen that 35
I have provided a highly desirable form of dome
and dry pipe outlet that is fully adapted for eco
nomical construction and maintenance and is ex
ceedingly well adapted to present day large size
boilers without in any way sacrlñcing the quality 40
of steam.
-`
It will of course be understood that various
changes in details of construction and arrange
ment of parts may be made by those skilled in>
the art without departing from the spirit of the
invention as set forth in the appended claims.
I claim:
1. In combination, a boiler shell having an
opening, a steam dome of larger diameter than
said opening having an outlet passage Whose up 50
per end is in communication with said boiler and
whose lower end extends downwardly through
said opening for downward communication with
a steam supply pipe located inside of the boiler,
and vertical webs connecting thewalls ofV said Ul 5
'
2,131,587
2
passage with said dome, said webs being arranged
so that steam flows upwardly around both sides
thereof and thence downwardly into the upper
endrof said outlet passage.
2. A steam dome having a relatively flat top
portion, an outlet passage wall having an upper
end spaced from said flat top and in communi
cation with said boiler and having a lower end
extending downwardly for downward communi
cation with the steam supply pipe connected
thereto, and vertical webs connecting said fiat
top with said passage wall, said webs being ar
ranged so that steam flows upwardly around both
sides thereof and thence downwardly into the
15 upper end of said outlet passage.
3. A steam dome having a flanged base and a
relatively fiat top with connecting sides, a wall
5. A steam dome having a flanged base and a
relatively flat top with connecting sides, a wall
forming an outlet passage projecting upwardly
into said dome but spaced from the top thereof,
and vertical webs connecting the top and sides
of said dome with the outer surface of said pas
sage wall, said webs having recessed outer edges
extending substantially from the lower ends of
the webs to the sides of said dome.
6. A steamdome having a flanged base and a 10
relatively flat top with connecting sides, a wall
forming an outlet passage projecting upwardly
into said dome but spaced from the top thereof,
andfvertical webs connecting the top and sides
of said dome with the outer surface of said pas 15
sage wall, said webs being arranged so that steam
ñows upwardly around both sides thereof and
forming an outlet passage projecting upwardly - thence downwardly. into the upper end of said
into said dome but spaced from the top thereof, outlet passage, said top having a central portion 20
depressed toward the center o-f said outlet pas
20 and vertical webs connecting the top and sides of sage.
said dome with the outer surface of said passage
wall, said webs being so arranged that steam flows
upwardly around both sides thereof and thence
downwardly into the upper end of said outlet pas
25 sage.
4. A steam dome having a flanged base and a
relatively flat top with connecting sides, a wall
forming an outlet passage projecting upwardly
into said dome but spaced from the top thereof,
30: vertical webs connecting the top and sides- of» said
dome with the outer surface of said passage wall,
said webs being arranged so that steam flows up
wardly around both sides thereof and thence
downwardly into the upper end of said outlet pas
Lsage, and a radial flange surrounding the upper
end of said outlet passage connecting the ends
of said webs.
.
7. A steam dome having a ñanged base and a
relatively fiat top with connecting sides, a wall
forming an outlet passage projecting upwardly
into said dome but spaced from the top thereof, 25
vertical webs connecting the top and sides of said
dome with the outer surface of said passage wall,
said webs being arranged so that steam flows up
wardly around both sides thereof and thence
downwardly into the upper Vend of said outlet 30
passage, said top having-a lcentral portion de
pressed toward the center of said outlet passage,
and said webs being connected to said depressed
central portion.
.
JAMEStC. MARIS.
35
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