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Патент USA US2136952

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Nov.v 15, 1938.
c. w. PLOEN ‘Er AL
Filed Sept. 28, 1936
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Patented Nov. 15, 1938
Curtis W. Ploen, Chicago, 111., and Augustine It.
Ayers, Shaker Heights, Cleveland, Ohio, assign
ors to The Okadee Company, Chicago, 111., a
corporation of Illinois
Application September 28, 1936, Serial No. 102,924
1 Claim. (01. 121-134)
The invention relates to automatic cylinder
One object of the invention is to provide an
improved automatic cylinder cock which comI 5 prises a spring for opening the drain-valve, which
is enclosed but located outside of thehigh tem- '
perature steam cavity of the cock. By reason
of this location, the spring can not foul the movement of the cylinder cock in the event the spring
10 becomes broken, can be easily examined and replaced without dismantling of the cylinder cock,
and is not affected by the high steam temperatures in the cock.
Another object of the invention is to provide
115' means located in the cap of the casing by which
the drain-valve can be closed and kept closed in
the event of a broken pipe in the line' which
supplies steam from the boiler for closing the
drain-valve, while the ‘engine, is operated to per20 mit the operation of the locomotive until repairs
can be made, and also to close the cylinder cock
when the locomotive is undergoing a hydrostatic
Another object of the invention is to provide a
25 cylinder cock with a casing which is provided
with a plurality of inlets which makes the cyl-
inder cock symmetrically applicable to the right
or left-hand cylinders, or to be differently positioned with respect to the cylinders.
Other objects of the invention will be appar-
ent from the detailed description.
The invention consists in the several novel features which are hereinafter set forth and are
more particularly de?ned by the claim at the
35 conclusion hereof.
In the drawing: Fig. 1 is a side elevation of an
engine cylinder having a pair of cylinder cocks
respectively connected to the ends thereof. Fig.
2 is a horizontal section of the improved cylinder
40 cock. Fig. 3 is a plan.
4-4 of Fig, 2,
Fig. 4 is a section on line
the casing; a spring l'l between cap l6 and
plunger II with its ends held in sockets in said
cap and plunger for normally unseating the valve
1; a lateral offset I9 of the casing 6 containing a
chamber 20 which communicates with the cham- 5
ber 2&1‘ around the valve 1; a pipe 2| connected
to the offset l9 which leads from one end of the
engine-cylinder a‘ to subject one side of valve 1,
when it is closed, to engine cylinder pressure; a
pipe 18 threaded into one side of the casing 6 10
to deliver steam from the boiler to the cylinder l0
in the casing, for exerting pressure against it to
close the valve 1 against the force of spring l1
and the steam under cylinder pressure acting on
the other side of the piston 9. The differential 15
areas on the opposite sides of piston 9 and valve 1
are such as to permit the ‘engine-cylinder pres
sure, when it becomes excessive or abnormal, to
open the valve 1 and relieve such pressure.
In practice, one of these cocks is applied to each 20
end of the cylinder, as well understood in the
art. Pipes 18 from the ends of the cylinders are
connected to a common pipe 23, which leads to
the engine-cap and is there provided with a valve
. for controlling the delivery of steam under boiler 25
‘ pressure to the cylinder H! for operation of the
piston 9 and valve 1, as well understood in the
art. A port l3b, provided in the bottom of the
cylinder extension l3, serves as a small vent and
also as a drain for any moisture.
In the operation of the improved cylinder cook,
the spring I‘! will keep valve 1 unseated except
when steam is delivered under boiler pressure
through pipe I8 to the cylinder Ill at one side
of the piston 9. The valve 1, when the engine 35
is not operating, will be open and will permit the
cylinder to drain through the cylinder cocks. The
valve 1 will remain open while the engine is in
operation until the engineer opens the valve 24
in the cab to admit steam from the boiler which 40
is greater than cylinder pressure, into one side
The invention is exempli?ed in a cylinder cock of cylinder ID. This will shift piston 9 to the left
comprising a casing 6; a valve 1 adapted to close and force the valve ‘I against its seat 8. If, dur
against a seat 8; a piston 9 integrally formed with ing the operation of the engine and While the
45 valve 1 and slidably mounted in a cylinder 10 valve 1 is closed, any excessive or abnormal con-- 45
formed in the casing 6; a head or plunger ll
dition develops in the cylinder, such as a slug of
integral with a stem, extending outwardly from water, the pressure in chamber 20a will be suffi
valve 1 and through the valve-seat 3 and slidably cient to force the piston 9 to the right against the
guided in a cylinder l3 formed in an extension force of the steam in the outer end of cylinder I0,
50 Ita at one end of the casing 6; a drain-outlet l4 thus eliminating the possibility of damage to the 50
at the outer side of the valve-seat 8; a cap [5 cylinders and Working machine. When the
screw-threaded into one end of casing B and 00- Steam is cut off from pipe l3 and cylinder "1 the
axial with the cylinder II]; a cap l6 screw- 000k Will be kept Open to drain the engine 0Y1
threaded into and closing the outer end of ex- inders.
55 tension l3a of the casing at the opposite end of
The location of the spring is an important fea- 55
ture because it is located outside of the high tem
perature steam cavity 2|]a in the casing 6. When
the spring is located in the high temperature
steam cavity around the valve 1, it is subjected
to superheated steam temperatures, which is
likely to cause breakage and if the spring be
comes broken when located in such’ cavity, it
sometimes fouls the movement of the valve. In
the construction set forth, the spring I‘! is 10
ture because it is located outside of the high tem
perature because it acts on a plunger on vthe
valve stem I2 which is located in an extension of
the casing beyond the drain cavity M. This loca
tion also makes it possible to readily examine the
spring upon removal of the cap l6 and to readily
?ared face tightly against the seat.
In practice, it is desirable to adapt the cock
so it can be reversibly positioned with respect to
the engine cylinders. For this purpose, the off
set IQ of the casing is provided with a screw
threaded opening 32 in both the upper and lower
walls of the o?-set I9. A screw-plug 33 is adapt 10
ed to close one of the openings while a pipe 2!
inder cock. The valve seat 8 is formed in a ring
is connected to the other. The plug 33 and the
pipe 2| may be screwed into either wall of the
casing as desired, so the casing can be reversed
with respect to the engine.
The invention is not to be understood as re
8at of heat-treated non-corrosive metal, which is
pressed into a socket in the casing and around
the ring.
be modi?ed within the scope of the appended
replace the spring without dismantling the cyl
In practice, it sometimes occurs that it is de
i; Li
forced by the screw. This makes it possible to
prevent the leakage of steam around the screw
Without the use of packing and by screwing the
sirable to close the cylinder cock, for example,
in the event of abroken steam pipe. It is also
necessary to close the cylinder cock when the
locomotive is undergoing a hydrostatic test. In
order to permit the valve to be held closed, a
screw 26 extends, and is threaded, through the
cap l5‘ and is provided at its outer end with 9,
polygonal terminal whereby the screw may be
turned and at its inner end with a head 28
which is adapted to engage a stem 29 integral
with the piston v9 and valve 1. By turning the
screw 26, its head 28 will engage the stem 29 and
force the valve 1 against its seat. A lock-nut 30
is applied ‘to the outer'end of screw '26 so that the
screw may be securely locked in its inoperative
‘position. ‘The head 28 is provided with an in
wardly ?ared annular face and the cap is. pro
vided with a correspondingly tapered annular
‘seat against which the face on ‘the head can be
stricted to the details set forth, since these may
claim, without departing from the spirit and
scope of the invention.
Having thus described the invention, what We
claim‘as new and desire to secure by Letters
Patent is:
In an automatic cylinder-cock, the combina
tion of a casing provided with a drain-port, a pis
ton within the casing, means for communicating
boiler-pressure to one side of the piston and
cylinder-pressure to the other side, a valve oper~
able by said piston to close the drain-port, a ,
spring for opening the valve, a cap at one end of L. O
the casing, and a screw in the cap for manually
closing the valve, the screw having a head at its
inner end provided with an inwardly ?ared an
nular face, the cap having a correspondingly
tapered annular seat against which the face on
the head can be forced by the screw to prevent
the leakage of steam around the screw.
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