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Патент USA US2409729

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Oct. 22,
Filed May 15, .1944
Í 29
' Gttornegs
Patented Oct. 22, .1946
` Wayne A. Baldwin, Watertown, N. Y., assignor to
The New York Air Brake Company, a. corpora
tion of New Jersey
Application May i5, 1944, serial No. 535,631
2 Claims.
This invention relates to Sanders, particularly
sanders foruse on locomotives.
Where sanders are mounted on the side of the
boiler of a steam locomotive below the sand box
it is sometimes necessary to provide distinct
forms of sanders (i. e. rights and lefts) for the
(Cl. 291-11)
portion of the body 6 and delivers sand flowing
from the sand box (not. shown) to the interior
of the trap body E. `The sand ñows beneath a
depending barrier I-I which serves to limit the
height to which sand will rise in the body 6 by
gravity flow. The cover 1 is formed with a pas
sage I2 through which stirring air is drawn into
the trap from the atmosphere. The entrance
One feature of the invention is the arrange
flow of air is caused by the ejector action which
-ment of the sander so that it can be assembled
in two different ways and thus produce either a 10 draws sand and air from the trap.
Entering air flows from `the passage I2 into a
righthand sander or a lefthand sander.
stirring tube I3 which is pressed into a porton
Another feature of the invention is the use of
the inner face of the cover 1. The tube I3 has
a self-sustaining Venturi ejector assembly which
at its top a narrow longitudinal slot I4. The air
may be mounted in the sander body in two differ
thus flows partly through the slot I4 and agitates
ent positions to effect the reversal above men
the sand so that the sand is carried at a proper
tioned. The ejector assembly includes a sustain
rate to the Venturi throat.
ing tube having positive positioning means and
To limit the stirring action to the proper ín
a lateral port which cormnunicates with the sand
tensityIby-pass port I5 leads from the passage
chamber of the trap body. At the outlet end of
two sides of the locomotive.
this tube there is aV removably mounted Venturi 20 I2 to the space within the trap above the level
of the sand. Increase in the size of the port I5
throat'whi‘ch is desirably formed of rubber and
diminishes the effectiveness of the stirring action.
which may be variously dimensioned to suit par
The body ‘6 is formed with two similar tubular
ticular conditions.' This interchangeable throat
extensions I6 and I1. These are aligned with one
has va projecting end which performs a secondary
another »as best shown in Figure 3 andreceive
the nozzle assembly which may be inserted from
either end.
This assembly is housed in and sustained by a
tip which coordinates certain related factors, the
tube II8 which is encircled by aligning ribs dimen
size of the nozzle port, the character ofV an en
trance strainer which protects the nozzle port, 30 sioned to ?t the bore of members I6, I1. The
tube I8 has a positioning flange I9 arranged to
and a rim which encircles the nozzle port and
er1-gage the end of extension I6 or I1 as the case
controls the width of the entrance aperture
may be. Near the flange the tube I8 is provided
through which sand reaches the Venturi throat.
with a positioning pin 2| which engages one of
Thus it is possible to manufacture the nozzle tip
the notches 22 or 23 formed in the extensions IB
in various sizes in which the dimension of all
and I1 respectively. The purpose of the position
functionally related parts are coordinated.
ing pin 2| is to assure that a lateral port 24
The preferred embodiment of the invention is
formed in the tube I8 is presented downwardly.
illustrated in the accompanying drawing, in
This port 24 then communicates with the cham
Figure l is an elevation of the trap as it would 40 ber within the body 6.
Threaded into the entrance end of the tube lI8
appear on the righthand side of the locomotive
is a nozzle tube 25 into the outer end of which
boiler with the air supply connection toward the
the air supply pipe 26 is threaded after the sand
cab, that is toward the rear end of the locomotive,
trap has been mounted on the locomotive." A
lthe sand discharging connection leading forward
45 nozzle tip generally indicated by the numeral 21
from the tra-p.
is threaded into the inner end of the nozzle tube
Figure 2 is a vertical section on the medial
25. This has a jet nozzle port 28 surrounded by
plane of the trap.
a rim 29. At its rear it has a tubular extension
Figure 3 is a section on the line 3--3 of Fig
3| which Vis cross-drilled as indicated at 32 to
ure 2.
The body of the trap is made up of two parts, 50 serve as a strainer. The cross-drilled ports 32
are smaller than the jet nozzle passage 28 and
the body proper 6 which is open at the front, and
so protect it against clogging. A removable plug
the cap 1 which is connected to the body 6 by
33 closes the rear end of the tip unit and may be
studs and nuts 8, and serves to close the open>
function in that it serves as a sealing gasket.
Also removably mounted‘in the tube is a nozzle
assembly. This nozzle assembly has a removable
front of the body.
Sand supply pipe 9 is threaded into the upper 55
removed on occasion.
Mounted in an annular seat formed in the dis
charge end of tube I8 is a Venturi throat 34
preferably formed of rubberlike material and
shaped to project beyond the annular nut 35
Which clamps it in its seat.
There is a union fitting 36 which seats against
the end of extension I1 (when the parts are as
sembled as shown in Figure 3) and is held by
a union nut 31. The ñtting 36 also seats against
the end of the Venturi throat 34, which thus
been described in considerable detail this repre
sents merely the best known embodiment of the
invention and is intended to be illustrative and
not limiting.
.What is claimed is:
1. In a sand trap, the combination of a body
having a sand-inlet connection, a sand-retaining
chamber to which said connection leads and an
open-ended transverse passage intersecting said
functions as a gasket to produce a tight seal. A 10 chamber; an ejector assembly insertable into said
union nut 38 identical with nut 31 is shown
passage in relatively reverse positions from re
threaded on the end of extension I6. Sand dis
spective ends thereof, said assembly comprising
charge pipe 39 is connected to the ñtting 3E and
a jet nozzle with air supply connections, and a
leads to the rail.
Venturi throat of rubber-like material and a sus
It Will be apparent that the tube I8 positions
taining sleeve serving to position said nozzle and
the nozzle and the Venturi throat and thus forms
throat in iixed coactive relation and so that the
a complete self-sustaining unit. This unit may
end of the throat is exposed at the end of the
be inserted into the aligned bores of extensions
sleeve; a sand-discharge connection; and means
I6 and I'I from the left as shown in Figure 3, or it
operable interchangeably to connect the air sup
may be inserted from the right. In the latter 20 ply end of the assembly to the body, and to con
case the nuts 31 and 38 are interchanged, the
nect the sand discharge connection to the body
nut 38 engaging the tube I8, and the nut 31
and seal it against the exposed end of the Ven
the union ñtting 36. In this Way the trap may
turi throat.
be assembled as either a righthand or a lefthand
2. In a sand trap, the combination of a body
trap prior to the connection of the pipes 26 and 25 having a sand-inlet connection, a sand-retaining
chamber to which said connection leads and an
Removal of the cover plate 'I gives access to
open-ended transverse passage intersecting said
the trap chamber and withdraws the stirring noz
chamber; an ejector assembly insertible into said
zle I3. No claim is here made to this detail
passage in relatively reverse positions from re
which is the invention of another. rI‘he discon 30 spective ends thereof, said assembly comprising a
nection of pipe 26 and release of nut 38 permits
tube having positioning means to engage the body
the removal of the tube I8 with all the ejector
and position the tube when the tube is inserted in
parts. After such removal these parts may be
either direction into said passage and a lateral
removed individually from the tube I8 and
port then so located as to communicate with said
cleaned or replaced as occasion may demand. 35 chamber, a combined jet nozzle and strainer re
This makes it possible to associate any desired
movably mounted in'one end of said tube and
type of nozzle with any desired type of Venturi
terminating adjacent said port, and a Venturi
throat removably mounted in the other end of
Since the nozzle tip 21 is interchangeable, the
said tube beyond said port; a sand discharge con
imple interchange of tips controls the coordina 40
and two threaded connectors, one asso
tion of the size of the strainer ports 32 with the jet
ciated with each end of said passage, and either
nozzle port 28. The height of rim 29 can be
adapted to ñx said tube in the body While the
chosen to control the sand entrance passage to
other connects the sand discharge connection
the Venturi throat.
with the Venturi throat.
While one embodiment of the invention has 45
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