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Патент USA US2106485

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Jan. 25,v 1938. _
>
2,106,485
E. E. HEWITT
INSECT EXCLUDER
Filed May 4, 1957
, INVENTOR
I
ELLIS E. HEWITT
BY
I
ATTORNEY
2,106,485?
Patented Jan. 25, 1938
UNITED STATES PATENT OFFICE
2,106,485
INSECT EXGLUDER.
Ellis E. Hewitt, Edgewood, Pa., assignor to The
Westinghouse Air Brake Company, Wilmer
ding, Pa, ‘a corporation of Pennsylvania
Application May 4, 1937, Serial No. 140,597
15 Claims.
This invention relates to a ?uid pressure brake
equipment and particularly to means adapted to
be applied to a vent passage in a brake control
ling valve device which is open to the atmosphere
in order to prevent the vent passage from being
closed or partially restricted by dirt or foreign
matter deposited therein by insects or otherwise.
It is an object of this invention to provide an
improved insect excluder and vent passage pro
lo tector.
A further object of the invention is to provide
an improved vent passage protector adapted to
be employed on valve devices of the type now in
service.
,
>
Another object of the invention is to provide an
improved vent passage protector of the type de
scribed and adapted to be secured on valve de
vices now in service without alteration of these
devices, or with only slight alteration thereof.
A further object of the invention is to provide
an improved vent passage protector which is
simple and inexpensive to construct, and which
is efficient in operation.
Another object of the invention is to provide an
improved vent passage protector which can be
easily and quickly installed.
ther objects of the invention and features of
novelty will be apparent from the following de
scription taken in connection with the accom~
panying drawing, in which
Fig. l is a view, largely in section, of a portion
of a brake controlling valve device equipped with
the insect excluder and vent passage protector
provided by this invention, a portion of the vent
"5 passage protector being broken away in order
to show portions of the valve device,
Fig. 2 is a sectional view, taken substantially
along the line 2-—2 of Fig. 1,
Fig. 3 is a sectional View similar to Fig. 2, and
40 showing a modi?ed form of vent passage protector
embodying this invention,
Fig. 4 is a. sectional view taken substantially
along the line 4-4 of Fig. 3,
Fig. 5 is a View partly in section of another form
45
of vent passage protector embodying this inven
tion, and
Fig. 6 is another view of the protector shown
in Fig. 5.
In Fig. 1 of the drawing there is illustrated a
portion of a brake controlling valve device of the
type with which the vent passage protector pro
vided- by this invention is adapted to be employed.
The valve device shown in the drawing is of the
type shown in U. S. Patent No. 2,031,213, issued
February 18, 1936, to Clyde C. Farmer, and in
(Cl. 303—1)
cludes a pipe bracket section I and an emergency
section 2.
The emergency section 2 comprises a body hav- .
ing a bore therein in which is mounted a piston 3
having at one side a chamber 4 which is con
nected by way of a passage 5 in the pipe bracket
section I to the brake pipe, not shown. The piston
3 has at the other side a valve chamber 6 which
is constantly connected by way of a passage 1
with a quick action chamber 8 formed in the pipe
bracket section I. The valve chamber 6 and the
quick action chamber 8 are adapted to be charged
with ?uid under pressure supplied from the brake
pipe through a restricted port 9 controlled by the
151
piston 3.
A main slide valve I0 and an auxiliary slide
valve II having movement relative to the main
slide valve are mounted in the valve chamber 5
and are operated by means of the piston 3.
In operation the emergency piston 3 is adapted
to respond to a service reduction in brake pipe
20.
pressure in the chamber 4, and moves the aux
iliary slide valve II relative to the main slide
valve in to a service position in which a port I2
through the auxiliary slide valve registers with a
port I3 through the main slide valve I0, while in
this position of the main slide valve I0, the port
I3 registers with a discharge passage I4 which is
open to an exhaust or vent chamber I5 formed
in the body of the emergency section 2, while this
chamber is open to the atmosphere through a
relatively large vent opening I6.
Upon movement of the auxiliary slide valve I I
to the service position, fluid under pressure is re
leased from the valve chamber 6, and from the
quick action chamber 8, at a rate sufficient to
reduce the pressure of the ?uid in these cham
bers substantially as rapidly as. the pressure of
the ?uid in the chamber 4 at the face of the
piston 3 is reduced on a service reduction in brake
pipe pressure to thereby prevent su?icient differ
ential being ‘developed between the pressure in
the valve chamber 6 and in the brake pipe cham
ber 4 to cause the piston 3 to be moved to the 45
emergency application position.
Upon an emergency reduction in brake pipe
pressure there is a rapid reduction in the pressure
of the ?uid in the piston chamber 4, and the
piston 3 operates to move the auxiliary slide valve I
II to an emergency position in which a port l8
through the main slide valve I0 is uncovered so
that ?uid under pressure from the valve cham
ber 6 ?ows through this port to a passage I9,
which leads to a chamber 20 at one face of a vent 55
2
2,106,485
valve piston 2 I, which is mounted in a bore in the
body of the emergency section 2.
The piston 2| has a stem 23 formed integral
therewith and extending across the vent cham
ber I5 at a point spaced from the discharge pas
sagel I4, and also spaced from the vent open
ing 6.
The vent valve piston stem 23:extends'through>
a bushing 24 mounted in a bore in the body-of
the emergency section 2, and provided with an
annular seat rib engaged by a sealing gasket
carried by a vent valve 26 secured on the end of
the vent valve piston stem. The vent valve 26‘
is yieldingly urged to the seated position by a
in the bore in which the vent valve piston recip
rocates.
The wall 36 of the vent chamber I5 has an
opening therein opposite the opening 38 in the
wall 35, and the bushing 24 is secured in this :1
. opening.
The lower portion of the vent chamber I5 is
open to the atmosphere throughthe vent opening
I 6, which is somewhat larger in diameter than
the distance between the end walls 35 and 36.
The lower portion of the wall 36 is cut away, as
indicated at 40, to provide for the free ?ow of
?uid from the vent chamber I5 to the vent open
ing I5, while a shoulder, indicated at 42 in Fig.
2 of the drawing, is formed at the junctvxe of the
the chamber 30, in which the vent valve is mount- ‘ wall of the vent opening I5 with the lower wall
ed, and the vent chamber I5. The chamber. 30. of the vent chamber I5.
is constantly connected with the brake pipe pas
The end walls 35 and 36 of the vent chamber
sage 5 by way of a passage 3i.
I5 are‘ joined by connecting walls 44 and 45
On an increase in the pressure of the ?uid in which intersect at a point remote from the vent
20
the chamber 20 at the face of the vent valve pis
opening l6, while the walls 44 and 45 diverge
ton 2|, force is exerted on the vent valve piston away from this point. The discharge passage I4
15 coil spring 28 to cut off communication between
20
to move it to the right, as viewed in Fig. 1 of
the drawing, and this movement of the vent
25
valve piston 2| is transmitted through the piston
stem 23 to move the vent valve 26 against the
spring 28 to open a communication from the
chamber 30 to the vent chamber I5 through which
fluid under pressure is released from the brake
30 pipe passage 5 at a rapid rate.
Fluid under pressure supplied to the chamber
20 is gradually released therefrom through a
restricted passage 33-through the piston 2I; and
on a reduction in the pressure of the ?uid in
35 the chamber 20 to a predetermined relatively
low value, the force exerted thereby on the ‘piston
2I is insu?icient to hold the vent valve 26 against
the opposingforce of the spring 28, and the vent
valve is thereupon moved by "the spring 28 into
40 engagement with the seat rib on the bushing 24
to out 01f communication between the brake pipe
and the atmosphere through the vent chamber I 5.
As constructed the vent opening I6, and the
vent chamber I5, in the body of the emergency
45 section 2 are relatively large in size in order to
permit fluid under pressure to bev'vented from
communicates with the vent chamber l5 at a
point between the end walls 35 and 35 and ad
jacent the juncture of the connecting walls 44
and 45, while the material of the body of the
emergency section extends toward the wall 35
in this region, as indicated at 45, and as is best
shown in Figs. 1 and 4 of the drawing.
The protector provided by this invention is
adapted to be mounted within the vent chamber
I5 to prevent access to the portion of the vent
chamber with which the discharge passage I4
communicates to thereby prevent the deposit of
mud or other foreign material in this portion of
the vent chamber.
The protector shown in Figs. 1 and 2 of the
drawing comprises a foraminous member in the
form of a sheet metal member 55 having a plu~
rality of relatively small holes formed therein.
The member 55 is of substantially uniform width
throughout, and is of a width approximately
equal to the distance between the end walls 35
and 35 of the vent chamber I5.
25
30
35
40
‘
The member 50 is provided with curved ends, 45
as indicated at 52 in Fig. 2 of the drawing, which
the brake pipe to the atmosphere at arapid rate _ are adapted to engage the diverging walls 44 and
on anemergency application of the=brakes. As 45, while the member 50 is of such length that
these portions are of relatively large size, insects, when the ends thereof are in engagement with
50' such as wasps, or the like, may enter the vent
the walls 44 and 45, the member 50 is located
chamber and deposit mud,‘ or similar material adjacent to, but spaced from, the portion 45 of. 50
in this chamber.
the body of the emergency section.
If mud or other material is deposited in the vent
A strap indicated at 54 is severed from the
chamber l5 it may completely or partially restrict main portion of the member‘ 50, and is offset or
, the release ofv ?uid under pressure through the
depressed relative thereto, as best shown in Fig.
discharge passage I4, thereby interfering with 2 of the drawing, The body of the emergency
the intended operation of the valve device.
section 2 is provided with aligned openings, one
The vent passage protector provided by this of which is in the form of a blindvopening in the
inventionis adapted'to be mounted within the wall 36, while the other is an opening which
vent chamber I5 to prevent access-by insects, extends through the wall 35. A pin 55 is se
wasps, or the'like, to the portion of the vent cured in these openings and extends through the
chamber with which the discharge passage I4 space between the strap 54 and the main por~
communicatesto thereby prevent’ the'deposit of tion of the member 50, and secures the member
mud, or-the like, in this chamber‘ in sucha man-.4 55 in position in the vent chamber I5.
65 ner as to restrict theVenting of fluid through the
The form of protector shown in Figs. 1 and 2
discharge passage I5.
of the drawing is intended to be installed in the
Inthe valve devices as constructed at present, emergency section before this section is com
the. vent chamber I5 has spaced substantially pletely assembled. In order to install this pro
parallel end walls 35 and 36. The wall 35 has a tector, the member 58 is inserted in the vent
circular opening 38 formed substantially‘ cen
chamber I5 through the vent opening I6, and is
trally thereof through which the vent valve pis
then held in a position in which the opening be
ton stem 23 extends, while'this wall separates tween the strap 54 and the main body of the
the chamber I5'from the bore in which the'vent member 50 is substantially in alignment with
valve piston 2| is mounted. An annular‘rubber the openings in the body of the emergency sec
sealing gasket 40 is mounted against the wall 35 tion in which the ‘pin 55 is secured. The pin 55
75
3I
2,106,485
is then inserted so as to extend between the
which the strap 54 is formed. , These strips,
strap 54 and the main body of the member 50.
The various parts of the protector and of the
which are indicated at 63, extend generally par
allel to each other and are spaced apart a short
distance. A spring 65 is provided, and is formed _‘
from suitable resilient material, such ‘as spring
valve device in which it is mounted are pref
erably arranged and proportioned so that the
central portion of the sheet metal member 50
must be bent or sprung slightly to bring the
aperture between the strap 54 and the main body
of the member 50 into alignment with the open
10 ings through which the pin 55 extends. As a
result, therefore, the ends of the member 50 will
be yieldingly pressed against the body of the
emergency section.
This will serve to lock the
member 50 in place, and to also secure the pin
15: 55 in position.
After the pin 55 has been inserted in position,
the gasket 40 is mounted in the bore in which
the vent valve piston 2| reciprocates. This
gasket overlies the end of the pin 55, and pre
20' vents the pin from moving out of the openings
in which it is mounted.
It will be seen that when the protector pro
vided by this invention is in position in the vent
chamber I5, it prevents access to tho-portion of
25: the chamber with which the discharge passage
25 communicates, and thereby prevents wasps,
insects, or the like, from depositing mud or other
foreign material in this portion of the chamber
where it might interfere with the discharge of
iluid under pressure through the discharge pas
sage, thereby interfering with the intended oper
ation of the valve device.
It will be seen also that the protector 5|] pro
vided by this invention is arranged to permit the
‘free discharge of ?uid under pressure from the
discharge‘passage I4 to the vent chamber I5,
from which ?uid is released to the atmosphere
through the relatively large vent opening l6.
In addition, it will be seen that because of the
40 relatively large area of the member 5i], and the
relatively large number of holes extending
through this member, there is little possibility
that the flow of ?uid through this member will
be restricted by the deposit of mud or the like
45
on the member to a degree to restrict the release
of fluid under pressure through the discharge
passage I 4.
In addition, it will be seen that the protector
provided by this invention is mounted in the vent
50 chamber I5 in a position in which it does not
interfere with or restrict in any way the ?ow of
fluid from the passage through the bushing 24
to the vent chamber I5 and to the atmosphere.
As a result, therefore, ?uid may be released at a
rapid rate from the brake pipe passage 5 to the
wire. The spring 65 is substantially U-shaped
in one plane, as is best shown in Fig. 4 of the
drawing, while the ends of the spring extend
between the strips 63, and the tips are bent
substantially at right angles so as to form a 10
hinged connection between the spring and the
member 60.
The arms of the U-shaped spring 65 are curved
in one plane, as is best shown in Fig. 3 of the
drawing, so as to be spaced a substantial distance 15
from the vent valve piston stem 23, while the end
of the spring remote from the member 65 has a
reverse curve therein which is adapted to rest
upon the shoulder 42 formed at the juncture of
the wall of the vent opening it with the lower 20
wall of the vent chamber l5.
The various partsof the protector shown in
Figs. 3 and 4 of the drawing are arranged and
proportioned so that when the member 55 is in
position in the vent chamber I5, and the end 25
of the spring 65 is resting upon the shoulder 52,
the spring 65 exerts force on the member 50 to
press the curved end portions 62 thereof against
the diverging walls 44 and 45 to thereby main
tain the member 60 in this position in the vent‘ 30~
chamber.
The various parts of the protector shown in
Figs_ 3 and 4 are proportioned so that they may
be inserted into the vent chamber I5 through
the vent opening I6, and, after they are in posi 35
tion in this chamber, to permit the member 5% to
be arranged in the position in‘ which it is shown
in Figs. 3 and 4 of the drawing, and also to
permit the spring 65 to be placed in position in
engagement with the shoulder 42. As this form
of protector may be'inserted into the vent cham
ber l5 through the vent passage I6, and may be
thereafter secured in position, it can be readily
installed in valve devices of this type which are
already in service, and does not necessitate re
moval of any of the parts of these valve devices,
or alteration of the valve devices in any way.
The‘ operation of the form of protector shown
in Figs. 3 and 4 of the drawing is substantially
the same as that shown in Figs. 1 and 2 of the
drawing.
“
atmosphere by operation of the vent valve 26
and this flow of ?uid will not be impeded by the
In Figs. 5 and 6 of the drawing there is shown
still another form of protector embodying this
invention. This form of protector is intended to
be employed in place of the form shown in Figs.
1 and 2 of the drawing, and differs from that form‘
as it employs a different type of foraminous ma
protector provided by this invention.
terial.
In Figs. 3 and 4 of the drawing there is shown
60 a modified form of protector provided by this
invention. The protector shown in these ?gures
of the drawing comprises a member 60 which is
generally similar to the member 50 in the form
of the invention shown in Figs. 1 and 2 of the
drawing. The member 60 comprises a section
of sheet metal of substantially the same width as
the space between the end walls 35 and 36 of
the vent chamber I5, and is provided with curved
end portions, as indicated at 62, adapted to
engage the diverging walls 44 and 45 of the vent
chamber I5.
The member 60 has a pair of strips extending
lengthwise thereof separated from the main body
of the member 60, and depressed or offset rela
‘ tive thereto in a manner similar to the way in
The form of protector shown in Figs. 5 and 6
of the drawing has a foraminous member con
structed of a piece of relatively rigid felt indi
cated at ‘Ill. This felt is of a width substantially
equal to the distance between the end walls 35
and 36 of the vent chamber I5, and of a length
su?icient to extend between the diverging walls 65
44 and 45 in substantially the same manner as
the member 50 shown in Figs. 1 and 2 of the
drawing.
The felt member 10 has associated therewith
securing means comprising a sheet metal member
indicated generally at ‘H, and having a body
portion indicated at ‘I2 adapted to engage the
rear face of the felt member ‘II! and to extend
lengthwise thereof. The body portion 12 has
tongues 13 extending at right angles thereto and 757
extending through the felt member"); the ends
of these tongues being bent: over, as best shown
in Fig. 5 of the drawing, to secure the member ‘H
to the felt.
The body portion 12 ‘of the member ‘H also has
ears ‘[4 extending at right angles thereto, and
provided with openings indicated at 15V adapted
to receive a pin similar to that indicated at 55 in
Figs. 1 and 2 of the drawing.
10
When the protector shown in Figs. 5 and 6 of
the drawing is in position in the vent chamber
IS, the felt member 10 prevents wasps, insects,
or the like, from reaching the portion of the vent
chamber with which the discharge passage Ill
communicates, while it also permits ?uid under
pressure to flow from the discharge passage 14 to
the portion of the vent chamber open to the vent
opening l6.
While three embodiments of the improved in
20: sect excluder and vent passage protector pro
vided by this invention have been illustrated and
described in detail, it should be-understood that
the invention is not limited to these details of
construction, and that numerous changes and
25 -modi?cations may be made: without departing
from the scope of the following claims.
Having now described my invention, what I
claim as new and desire to secure by Letters
sure to vent'?uid'under pressure through said
discharge passage, and means to prevent inter
ference with the venting of ?uid through said
discharge passage, said means-comprising afo
raminous member mounted in said vent chamber
and extending between said end walls, portions
of said member engaging said diverging walls, said
member separating the portion of the vent cham
ber open to the discharge passage from the por
tion of the vent chamber open- to the vent open
ing, and a pin secured in aligned openings'in said
chamber end walls for maintaining said foram
inous member in position.
4. In’ a protector adapted to be employed in a
valve device of the type having a body having a 151'
vent chamber therein open to the atmosphere
through a relatively large vent ‘opening, said body
having therein a vent valve controlling a vent
passage open to said vent chamber, said body
also having a discharge passage therein opening
to said vent chamber at a point spaced from the
vent opening and spaced from said vent passage,
the valve device incorporating means for vent
ing ?uid under pressure through said discharge
passage and also incorporating means for actu
ating said vent valve to vent ?uid through said
vent passage at airelatively rapid rate, the pro-
with the venting-of ?uid through said discharge
tector comprising a foraminous member adapted
to be secured in said vent chamber and operable
when in position in said chamber to separatethe 30:
portion of said chamber open to the discharge
passage from the portions of said chamber open to
the vent passage and-open to the vent opening,
and means for securing said member in said.‘
chamber.
35
5. In a protector adapted to be employed in
a valve device of the type having a body having
a vent chamber therein open to the atmosphere
passage, said means comprising a foraminous
through a relatively large vent opening, said
Patent, is:
30'
1. In a ?uid pressure brake, in combination, a
brake pipe, a valve device having a body having
a vent chamber therein-open to the atmosphere
through a relatively large vent opening, said
valve device being operable on a reduction in
35 :brake pipe pressure to vent ?uid under pressure
to a discharge passage in said body open to said
vent chamber, and means to prevent interference
‘member mounted in said vent chamber and sep
body having therein a vent valve controlling a
arating the portion of the vent chamber at the vent passage open to said vent chamber, said
end of the discharge passage from the portion of body also having a discharge passage therein
the vent chamber open to the vent opening.
opening to said vent chamber at a point spaced
2. In a fluid pressure brake, in combination, from the vent opening and spaced from said vent
45 a brake pipe, a valve device having a body having passage, the valve device incorporating means
a vent chamber therein open to the atmosphere‘ for venting ?uid under pressure through said
through a relatively large vent opening, said body discharge passage and also incorporating means
also having a discharge passage formed therein for actuating said vent valve to vent ?uid
and communicating with said vent chamber at through said vent passage at a relatively rapid
50. a point spaced from said vent opening, the walls rate, the protector comprising a foraminous
of said vent chamber diverging away from said member adapted to be secured in said vent cham
discharge passage, said valve device being op
ber and operable when in position in said cham
erable on a reduction in brake pipe pressure to ber to separate the portion of said chamber open
vent ?uid under pressure through said discharge to the discharge passage from the portions of
55 passage, and means to prevent interference with said chamber open to the vent passage and open
the venting of ?uid through said discharge pas
to the vent opening, and means for securing said
sage, said means comprising a foraminous mem
member in said chamber, said member and said
ber mounted in said vent chamber and held in securing means therefore being insertable into
engagement with said diverging walls at a point said chamber through said vent opening.
60 spaced from the end of said discharge passage to
6. A protector adapted to be employed with a
separate the portion of the vent chamber ad
valve device of the type having a body having a
jacent the end of the discharge passage from the vent chamber therein open to the atmosphere
portion of the vent chamber open to the vent through a relatively» large vent opening, and hav
opening.
ing a discharge passage formed therein and
65
3. In a ?uid pressure brake, in combination, a
communicating with said vent chamber at a
brake pipe, a valve device having a body having point remote from said vent opening, the valve
a vent chamber therein open to the atmosphere
device incorporating means for venting ?uid un
through a relatively large vent opening, said vent der pressure through said discharge passage, the
chamber having spaced substantially parallel end protector comprising a foraminous member
70 walls joined by diverging connecting walls, said adapted to be mounted in said vent chamber to
body also having formed therein a discharge pas
separate the portion of said vent chamber open
sage communicating with said vent chamber at to the discharge passage from the portion of
a point between said end walls and adjacent the said vent chamber open to the vent opening, and
juncture of said diverging walls, said valve device means associated with said member for securing
75. being operable on a reduction in brake pipe pres
said member in position in said chamber.
45.
50,
55;
60
65
70
2, 106,485
5
"7. A protector adapted to be employed with a
being formed of a width substantially equal to
valve device of the type having a body having a
vent chamber therein open to the atmosphere
through a relatively large vent opening, and hav
the distance between the end walls of said cham
ber, the ends of said member being adapted to
engage said diverging connecting walls to sep
arate the portion of said vent chamber open to
the discharge passage from the portion of said
ing a discharge passage formed therein and com
municating with said vent chamber at a point
remote from said vent opening, the valve de
vice incorporating means for venting ?uid un
der pressure through said discharge passage, the
protector comprising a foraminous member
adapted to be mounted in said vent chamber to
separate the portion of said vent chamber open
to the discharge passage from the portion of
said vent chamber open to the vent opening, and
15 means associated with said member for securing
said member in position in said chamber, said
vent chamber open to the vent opening, said
member having an offset portion disposed inter
mediate the edges thereof and an element ex
tending between said member and the offset por 10
tion thereof and adapted to be secured in aligned
openings formed in the end walls of said vent
chamber for securing said member in position
in said chamber.
11. In a protector adapted to be employed in 15
a valve device of the type having a body having
member and the securing means therefore being ~ a vent chamber therein open to the atmosphere
insertable into said chamber through said vent through a relatively large vent opening, said
opening.
20
8. A protector adapted to be employed with a
valve device of the type having a body having a
Vent chamber therein open to the atmosphere
through a relatively large vent opening, and
having a discharge passage formed therein and
communicating with said vent chamber at a point
remote from said vent opening, the valve device
incorporating means for venting ?uid under
2 pressure through said discharge passage, the pro
- tector comprising a ioraminous member adapted
30 to be mounted in said vent chamber to separate
the portion of said vent chamber open to the
discharge passage from the portion of said vent
chamber open to the vent opening, and a spring
associated with said member and engageable
with a wall of said chamber at a point generally
opposite the point of connection of said discharge
passage with said vent chamber for yieldingly se
curing said member in position in said chamber.
9. In a protector adapted to be employed in a
40 valve device of the type having a body having a
vent chamber therein open to the atmosphere
through a relatively large vent opening, said
chamber having spaced substantially parallel end
walls joined by diverging connecting walls, said
45 body having a discharge passage formed there
in and communicating with said vent chamber at
a point between said end walls and adjacent the
juncture of said diverging connecting walls, the
valve device incorporatong means for venting
50 ?uid through said discharge passage, the pro
tector comprising a foraminous member adapted
to be mounted in said vent chamber, said mem
ber being formed of a width substantially equal
to the distance between the end walls of said
55 chamber, the ends of said member being adapt
ed to engage said diverging connecting walls to
separate the portion of said vent chamber open
to the discharge passage from the portion of said
vent chamber open to the vent opening, and
60 means for maintaining said member in position
in said chamber.
10. In a protector adapted to be employed in a
valve device of the type having a body having
a vent chamber therein open to the atmosphere
65 through a relatively large vent opening, said
chamber having spaced substantially parallel end
walls joined by diverging connecting walls, said
chamber having spaced substantially parallel end
walls joined by diverging connecting walls, said 20
body having a discharge passage formed there
in , and communicating with said vent cham
ber at a point between said end walls and ad
jacent the juncture of said diverging connecting
walls, the valve device incorporating means for 25
venting fluid through said discharge passage,
the protector comprising a foraminous member
adapted to be mounted in said vent chamber,
said member being formed of a width substan
tially equal to the distance between the end walls
of said chamber, the ends of said member being
adapted to engage said diverging connecting walls
to separate the portion of said vent chamber
open to the discharge passage from the portion
of said vent chamber open to the vent opening, 35
and a spring extending between said member and
the opposite side of said vent chamber for main
taining said member in position in said vent
chamber.
12. In a protector adapted to be employed in a 40
valve device of the type having a body having
a vent chamber therein open to the atmosphere
through a relatively large vent opening, said
chamber having spaced substantially parallel end
Walls joined by diverging connecting walls, said
body having a discharge passage formed therein
and communicating with said vent chamber at
a point between said end walls and adjacent the
juncture of said diverging connecting walls, the
valve device incorporating means for venting ,_
?uid through said discharge passage, the pro
tector comprising a foraminous member adapted
to be mounted in said vent chamber, said member
being formed of a width substantially equal to
the distance between the end walls of said cham- .
ber, the ends of said member being adapted to
engage said diverging connecting walls to sep
arate the portion of said vent chamber open to
the discharge passage from the portion of said
vent chamber open to the vent opening, and a 60
spring extending between said member and the
opposite side of said vent chamber for maintain
ing said member in position in said vent cham
ber, said member and said spring being insertable
into said vent chamber through said vent open 65
ing.
13. In a protector adapted to be employed in
a valve device of the type having a body having
body having a discharge passage formed therein
and communicating with said vent chamber at a
70 point between said end walls and adjacent the
a vent chamber therein open to the atmosphere
valve device incorporating means for venting
?uid through said discharge passage, the pro
tector comprising a foraminous member adapted
75 to be mounted in said vent chamber, said member
and communicating with said vent chamber at a
juncture of said diverging connecting walls, the
through a relatively large vent opening, said 70
chamber having spaced substantially parallel end
walls joined by diverging connecting walls, said
body having a discharge passage formed therein
point between said end walls and adjacent the 75
'6
‘juncture of ‘said divergingponnecting ‘walls, the
opening, and -a spring adapted ‘to extend 3'be
‘valve device "incorporating ‘means for venting
"?uid through said discharge passage, the pro
tector comprising a relatively rigid felt member
of a‘ width' substantially equal to the distance be
tween the end walls of the vent chamber, the
ends of said felt member being adapted to engage
tween vsaid member and the ‘shoulder on said
said diverging connecting walls to separate the
portion of the vent chamber open to the discharge
10 T passage from the portion of the vent chamber
' open to the vent opening, and means for securing
body for securing said member in position in
said vent» chamber.
115. 'In a protector adapted to be employed in‘a *
valve device of the type having a body having a
vent chamber therein having spaced substantial
ly parallelend walls joined by diverging 'con
necting walls, said body having a relatively large
vent opening therein indicating with said‘vent:
‘chamber at a point intermediate said chamber
end walls, said body having a shoulder‘thereon
‘at‘the juncture of‘the wall of ‘said vent opening
said felt member in’position in said chamber.
14. In a protector adapted to be employed in
a valve device of the type having‘ a body having ' and a‘connecting wall of said vent chambensaid
‘body also having a ' discharge passage formed?
15 a vent chamber' therein having spaced substan
tially parallel end walls joined by diverging con
thereinand communicating with-said vent cham
necting walls,’ said body'having a relatively large ber’at-a point generally opposite said vent open
vent opening therein communicating with said ing and between said chamber end walls and
also adjacent the juncture of said diverging con
vent chamber‘at‘a point intermediate said cham
ber end‘ walls, said body‘ having'a shoulder there
on‘ at the juncture ‘of the wall of said vent open
ing ‘and ‘a connecting wall of said vent chamber,
said body also having a discharge passage formed
"necting ‘walls, the protector comprising a £04320
raminous member adapted to be mounted in said
'vent chamber, said member ‘being formed of a
width substantially equal to the distance be
- therein and‘communicating with said vent cham
tween the‘end Walls of said chamber, the ends
of vsaid member being adapted to engage the‘
ber ‘at-‘a point generally opposite‘ said vent open
"ing and-between said chamber end walls and "diverging connecting walls to separate the por
also‘adjacent- the juncture of said diverging con
tion-‘of said vent chamber open to said discharge
necting walls, the protector comprising a foram
passage from the portion of said vent chamber
inous member adapted to bemounted in said vent open to the vent opening, and a spring having
‘chamber, said-member being formed of a width one end'thereof' connected to said member sub- '
substantially equal‘ to‘ the‘distance between the
end walls of said chamber, the ends of said mem
stantially centrally thereof, the other end of said
spring having'aportion adapted to press against
ber-being adapted to engage‘the diverging con
necting walls to separate the portion of said vent
the shoulder'on vsaid body to maintain the mem
ber‘ in position in said chamber.
chamber open to said discharge passage from the
portion of said vent chamber open to the vent
‘ ELLIS E. HEWITT.
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