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Патент USA US2122211

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June 28, 1938.
J_ M||_|_sI JR
'
2,122,211
EXHAUST NOZZLE
Filed Oct. 11,‘ 1937
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Inventor
A fiorneys
Patented June 28, 1938
'
2,122,211
UNHTED STATES PATENT OFFIQE
2,122,211
EXHAUST NOZZLE
John Mills, Jr., Auburn, Wash.
Application October 11, 1937, Serial No. 168,492
2 Claims. (Cl. 230-400)
This invention relates to an exhaust nozzle
for locomotives, the general object of the inven
tion being to so form the nozzle that the draft
will be increased and back pressure in the cylin
5 ders will be reduced and the e?lciency of the 10
comotive will be generally improved.
This invention also consists in certain other
features of construction and in the combination
and arrangement of several parts, to be herein
10 after fully described, illustrated in the accom
panying drawing and speci?cally pointed out
in the appended claims.
-
In describing the invention in detail, reference
will be had to the accompanying drawing where
15 in like characters denote like or corresponding
parts throughout the several views, and in
which:
Figure l is a top plan View of the nozzle.
Figure 2 is a sectional view but only showing
20
one of the vanes.
'
In this drawing the numeral I indicates a cyl
inder which is provided with the annular rib
2 on its exterior which forms a rest for the de
vice in the stand pipe.
The cylinder has the
25 lower end of its bore ?aring as shown at 3 so
that the steam from the exhaust pipe can readily
pass into the same and in carrying out my in
vention I form a plurality of vanes 4 on the in
ternal wall of the cylinder, each vane being of
30 substantially wedge~shape in cross section with
its base connected with the cylinder wall and
each vane slopes upwardly at an angle with re
spect to the vertical. The underside face of each
vane is concave as shown at 5 and the opposite
35 side face is convexed as shown at .6. The lower
end of each vane gradually curves to a substan
tially feathered edge ‘I! so that said lower end
will not offer any obstruction to the entrance
of the steam into the nozzle. As will be seen
40 these vanes are of such width as to leave a com
paratively large space at the center of the nozzle
which allows exhaust steam to pass through
without obstruction and the peculiar shape of
the vanes acts to draw steam from the stream to
5 themselves and then direct this steam on an an
gle from the center stream and this steam as it
leaves the vanes goes against the walls of the
petticoat pipe, ?lling the same and thereby caus
ing a vacuum in the smoke box. The vanes
cause the steam which comes in contact with
them to leave the nozzle at an angle, thereby
?lling the stack and due to the fact that said
vanes are sharpened on the lower ends, thereby
causes very little resistance, and also due to the
large open space in the center of the nozzle, the
exhaust steam will escape through the nozzle
and out the stack so quickly and easily that in
addition to creating a vacuum in the smoke box 10
it leaves the cylinders immediately on complet
ing its work and is out of the way of the next
stroke of the piston voluntarily, without having
to be forced out by the piston. This allows for
greater speed, less back pressure knock, which 15
is easier on main and side rods and the driving
boxes. Besides making for easier draft on the
?re the invention causes a saving in fuel.
It is thought from the foregoing description
that the advantages and novel features of the 20
invention will be readily apparent.
It is to be understood that changes may be
made in the construction and in the combina
tion and arrangement of the several parts, pro
vided that such changes fall within the scope 25
of the appended claims.
Having described the
invention, what
is
claimed as new is:—
1. An exhaust nozzle for a locomotive com
prising a cylinder and a plurality of vanes con- 30
nected with the internal walls of the cylinder,
each vane being arranged at an angle and each
vane being of Wedge shape in cross section with
its underside face concave and its other side face
convexed, each vane being of substantially the 35
same width from end to end.
'
2. An exhaust nozzle for a locomotive com
prising a cylinder and a plurality of vanes con
nected with the internal walls of the cylinder,
each vane being arranged at‘ an angle and each
vane being of wedge shape in cross section with
its underside face concave and its other side face
convexed, each vane being of substantially thev
same width from end to end and the lower end
of each vane tapering downwardly from its con- 45
cave face to its convex face.
JOHN MILLS, JR.
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