Improvements in Pressure. Reducing. Valves, and Pump Governors.
Year: 1893

page_text: • Date of Application;: 10th Jan., 1893-Accepted, 1st Apr., 1893,
COMPLETE SPECIFICATION:
Improvements in Pressure. Reducing. Valves, and Pump
Governors.
EDGAR JAMES WOOD of No. 243; Broadway in the City of New York, in' the:,
County and State of New York, United States of America, Engineer, do. hereby,
declare. the nature of this invention and in what. manner, the same is to be
performed, to be particularly described and ascertained in and by, the following..
statement :-
.
My invention relates to improvements in reducing pressure valves, arranged to
act either as a reducing pressure valve 'alone, or as a pump governor, in connection'
with either a closed or open tank.
In the accompanying drawings,
Figure is a view in longitudinal section through a form of a reducing pressure
valve arranged to act at the same time both as a reducing pressure valve and pump..
governor ;
г
Figure 2 shows the application of said reducing pressure valve and pump
governor to a pump in connection with a closed tank;
Figure 3 represents in part a form of the valve- in which it is arranged to act.as'.
a reducing pressure valve alone; and:
Figure 4 represents' in part a form of the valve which will admit of its use either
as a reducing pressure valve alone, or as a pump governor, either in connection
with a closed or open' tank.
The coupling pipe section to which the valve is attached, is represented by A,
and is separated into chambers a and a' by a fixed diaphragm a². The chamber a
is that into which the motive fluid is supposed to enter first, and represents the high
pressure chamber, while the chamber a¹ represents the low pressure chamber; or
that from which the fluid passes to do its work! The diaphragm a² is provided
with a valve seat for the reception of a hollow faced piston valve B, adapted to
reciprocate in a housing C, screwed into the top of the section A. There is space
left between the top of the valve B and the top of the housing C, in which a
springs is inserted for pressing the valve B toward its seat, and said space is con-
nected with the high pressure chamber a through a small opening 6 in the head of
the valve B. An adjusting rod D has a screw-threaded connection with a
support c'above the housing C, and extends down through a stuffing box in the top
of the housing C, into position to positively limit the upward movement of the
valve B, or to bold the valve to its seat, as may be desired.
.....
.:
'T
11
j
A piston valve E has a reciprocating movement within the housing C¹, screwed!
into the top
of the pipe section A, and has a communication with the low pressure.
chamber a
Communication is established between the low pressure chamber 'a' and the space
between the valve B and the top of the housing C, by means of a port e, through
the valve E and a pipe connection e' leading from the housing C' to the housing C
The valve E is connected by a rod e²; extending through the top of its housing;
with a piston valve: Elocated in a housing C above: the housing C, and in
alignment therewith, so that the valves E and E' will act in unison. A spring e,
inserted between the valve E' and the top of the housing C2, tends to hold the
valves E and E' pressed toward their seats, or lowermost positions. An adjusting".
rode, having a screw-threaded' connection with the top of the housing C2, serves'
to increase or diminish the tension of the spring eupon the valves. There is a
opening in the side of the housing C2; at a point below the piston valve E¹for
the admission of the fluid from the discharge side of the pump, as, for example,"
;
:

page_text: through the pipe F, see Figure 2, leading from the closed tank G, into which the
pump H discharges through a discharge pipe h.
When used as a reducing pressure valve alone, the opening c¹ may be closed, and
whenever the fluid pressure in the chamber a¹ becomes greater than the pressure
desired, it will overcome the tension of the spring e³, and lift the valve E, thereby
closing communication between the port e and the space above the valve B, which
will cause the pressure in said space to accumulate through the opening 6', until it
reaches the pressure in the chamber a, when the valve B will promptly close under
the pressure of the spring b, and thereby shut off the passage of the fluid from the
chamber a to the chamber a¹. As soon as the pressure in the chamber a¹ has
become reduced to that desired, the valve E will return toward its seat, thereby
opening communication between the port e and the space above the valve B, which
will promptly relieve the pressure in said space, and the valve B will again rise,
and admit the fluid from the chamber a to the chamber a¹.
:
When employed as a pump governor, communication is made with the discharge
side of the pump through the opening ', and whenever the pressure upon the
discharge side of the pump, or in the closed tank, in which the pump. discharge
becomes greater than that determined upon, the fluid will cause the piston valve E¹
to lift against the pressure of the spring e³, and will thereby lift the valve E and
cut off the admission of the motive fluid from the chamber a to the chamber a¹, in
the same manner as heretofore set forth.
In Figure 3, I have shown the simple arrangement corresponding in all respects
to that represented in Figure 1, with the exception that the housing C², containing
the piston valve E connected with the valve E, is omitted.
In Figure 4 I have shown a structure in which the fluid from the low pressure
chamber a may be allowed to act upon the same valve that the fluid from the
discharge side of the pump operates upon, and have arranged for cutting off
communication with said valve from either one or the other of the above named
sources, as may be desired. I have also provided for connecting the same piston
rod with a float in an open tank, to control the passage of the motive fluid through
the pipe section A. To this end, I have connected the pipe e¹ leading to the space
above the valve B with a conduit es, extending along down the valve stem eⓇ into
communication with the low pressure chamber a. To the lower end of the stem eº,
I secure a valve E2, adapted to open and close the conduit or port e leading to the
connection e. The stem e is also secured at its outer end to the piston valve E',
and communication is established between the space of the under side of the
valve E', within the housing C³, and the low-pressure chamber a¹, through the
port I. The opening c¹, for the connection of the pipe leading to the discharge
side of the pump, is located in a manner quite similar to that shown in Figure 1,
and provision is made for plugging said opening c¹, and also for plugging the lower
end of the port I, whenever it is desired so to do. A spring e³ serves, as before,
to hold the valves E' and E2 depressed, and a rod K, fixed to the valve E, extends.
upwardly through the housing of the valve, into position to be attached to a float,
not shown, of well known or suitable form, rising upon the surface of the liquid
in the open tank, and so connected with the rod K, that the said rod will rise and
fall in unison with the rising and falling of the liquid in the tank.
When the structure shown in Figure 4 is used as a reducing pressure valve alone,
the opening may be plugged, and the port I left open, the result being to close
the port e, whenever the pressure in the chamber a is sufficient to lift the valve E
When employed as a pump governor, the port I may be plugged, and the connection
with the discharge side may be made through the opening c¹,-the effect being,
when the pressure on the discharge side becomes too great, to lift the valve E,
and thereby close the port es, to shut off the motive fluid as before stated. When
employed in connection with an open tank, the ports c¹ and I may both be plugged,
and the connection made with the rod K; as the water lowers in the tank, it will
permit the valves E and E2 to lower, and hence admit the motive fluid freely, but
when the water reaches a predetermined height, it will tend to lift the valves E

page_text: and E, closing the port e, and thereby-in the manner before described-shut off
the passage of the motive fluid.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is :-
1. In combinatiou, a high pressure chamber, a low pressure chamber, a main
valve under the control of the fluid in the high pressure chamber, to open
communication for the passage of the fluid, a piston valve independent of the
aforesaid main valve, and permanently exposed directly to the pressure of the fluid
in the low pressure chamber; pressure regulating means in connection with the
piston valve, for determining the pressure under which it shall operate; a chamber
at the back of said main valve, in permanent communication with the high pressure
chamber, and a passage way from the said chamber at the back of the main valve
through the wall of the piston valve casing, and past the piston valve itself, to the
low pressure chamber, substantially as set forth.
2. The reducing pressure valve and regulator, comprising three valves, one
under the control of the high pressure motive fluid, to operate it, a second under
the control of the low pressure motive fluid, to operate it, and a third under the
control of the pressure at the outletting side of the pump, to operate it, the second
and third named valves being connected to operate as one, and located in chambers
independent of each other, and a conduit leading from the outer side of the first
named valve into communication with the low pressure motive fluid, said conduit
being under control of both second and third named valves, to close and open it,
substantially as set forth.
3. The reducing pressure valve comprising a barrel or coupling section separated
into high pressure and low pressure chambers, a valve for controlling the passage
of fluid from one chamber to the other, a closed casing for said valve, the interior
of said casing being in communication with the high pressure chamber through an
opening in the valve, and a piston valve in communication with the low pressure
chamber, and provided with a port through it in communication with the interior
of the casing of the first named valve, in combination with a piston within an
inclosed casing, and connected to move with said piston valve, and means for
connecting the casing containing said piston with the delivery side of a pump, and
for connecting the barrel or coupling section with a pipe for the transmission of a
motive fluid, substantially as set forth.
4. The reducing pressure valve and regulator comprising three valves, one under
the control of the high pressure motive fluid, another under the control of the low
pressure motive fluid, and a third under the control of either the low pressure fluid
or the fluid at the discharge side of a pump, and from either a closed or open tank,
the low pressure chamber being in communication with a chamber at the back of
the high pressure valve, and said communication being under the control of the
third named valve, to open and close it, substantially as set forth.
Dated this 6th day of January 1802
NEWTON & SON,
Agents for the Applicant.