Improvements in Hydraulic Regulating Valves.
Year: 1898

page_text: Date of Application, 2nd Apr., 1898
Complete Specification Loft 2nd lon 1900
Sonanted 11th Enh
4000
PROVISIONAL SPECIFICATION.
Improvements in Hydraulic Regulating Valves.
I, MATTHEW THOMAS MEDWAY, Albert Lift Works, Rolt Street, Deptford,
Engineer, do hereby declare the nature of this invention to be as follows:
This invention relates to improvements in hydraulic regulating valves, used
for lifts, or other hydraulic machinery, and has special reference to the form or
type of valves known as spindle or plunger valves.
The object of this invention is to provide a valve of a simple construction and
one that can be readily repacked, without the inconvenience and trouble of com-
pletely dismantling the valve in order to get at the interior for this purpose.
In order to carry out this invention, I provide a valve body having usual pres-
sure inlet branch, and branch to the lift cylinder or other hydraulic machine,
the outlet, exhaust, or waste branch, being at the end of the valve beyond the
branch to the machine cylinder aforesaid, the said waste branch forming the ter-
mination of a closed cap or dome. The body of the valve is swelled out in those
parts which are opposite to the inlet branch and delivery branch respectively, in
order to provide a chamber or circular passage round the sleeve to be hereinafter
described.
The interior of the valve is constructed in the following manner:-A cylinder
or sleeve is inserted in the barrel or cylinder of the body of the valve, which is
bored out to receive this said sleeve, as far as the position of the inlet branch,
beyond which the barrel is bored to receive the spindle or plunger of the valve,
which works through a leather or other packing, the said packing being held in
place by the said sleeve. The sleeve at that portion open to the inlet branch or
chamber is perforated with holes or slots for the admission of the water into the
interior of the sleeve. The sleeve is also held in place by a gland, at the end of
the barrel of the valve. The plunger rod or spindle goes right through the length
of the valve, and is kept watertight by the leather or other packing in the usual
way.
To regulate the admission of water to the delivery pipe of the valve, I make
saw cuts, or form small grooves along the spindle, in such a way, and of such
a length, that when the spindle is in a certain position, the grooves open a.com-
munication between the pressure and delivery chambers aforesaid, but when the
spindle is moved back a certain amount, these communications are closed. Again,
I make a further number of such grooves or passages, at a proper distance beyond
the aforesaid grooves for admission of pressure, so that in like manner communi-
cation can be made between the delivery branch and the exhaust pipe of-the
valve, so that by moving the spindle backwards or forwards, the valve can be
opened to pressure or exhaust, or may be closed as may be required. If more
convenient I drill small holes through the metal of the spindle or plunger instead
of forming grooves or slots. By this means, I can remove the spindle or plunger,
as well as the sleeve aforesaid, as also the leather or other packing, and inspect

page_text: the interior of, or repack, the valve, without in the least disturbing or breaking
the pipe or valve joints, and thus effect a great saving of time and trouble, and
the inconvenience arising therefrom.
T
1
0
1 1000
improvements in yaraulic Regulating Valves.
I, MATTHEW THOMAS MEDWAY, Albert Lift Works, Rolt Street, Deptford,
S.E., 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; -
This invention relates to improvements in hydraulic regulating valves, used
for lifts, or other hydraulic machinery, and has special reference to the form or
type of valves known as spindle or plunger valves.
The object of this invention is to provide a valve of a simple construction and
one that can be readily repacked, without the inconvenience and trouble of com-
pletely dismantling the valve in order to get at the interior for this purpose.
In order to carry out this invention I provide a valve body having the usual pres-
sure inlet branch, and branch to the lift cylinder or other hydraulic machine,
the outlet, exhaust, or waste branch being at the end of the valve beyond the
branch to the machine cylinder aforesaid, the said waste branch forming the ter-
mination of a closed cap or dome.
The body of the valve is swelled out in those parts which are opposite to the
inlet branch and delivery branch respectively, in order to provide a chamber or
circular passage round the sleeve to be hereinafter described.
The interior of the valve is constructed in the following manner;-A cylinder
or sleeve is inserted in the barrel or cylinder of the body of the valve, which is
bored out to receive this said sleeve, as far as the position of the inlet branch,
beyond which the barrel is bored to receive the spindle or plunger of the valve,
which works through a leather or other packing, the said packing being held in
place by the said sleeve. The sleeve at that portion open to the inlet branch or
chamber is perforated with holes or slots for the admission of the water into the
interior of the sleeve.
The sleeve is also held in place by a gland, at the end of the barrel of the
valve. The plunger rod or spindle goes right through the length of the valve,
and is kept water-tight by leather or other packing in the usual way.
To regulate the admission of water to the delivery pipe of the valve, I make
sawcuts, or form grooves along the surface of the spindle, or I preferably make
portions of the spindle hollow, and drill holes for the admission of the water
into these hollow portions, these said sawcuts, grooves or drilled hollow portions
being made in such a way and of such a length, that when the spindle is in a
certain position, communication is opened between the pressure and delivery
chambers aforesaid, but when the spindle is moved back a certain amount, these
communications are closed. Again, I make a further number of such grooves or
passages at a proper distance beyond the aforesaid grooves or pas-
sages for the admission of pressure, so that in like manner communication
can be made between the delivery branch and the exhaust pipe of the valve, so
that by moving the spindle backward or forward, the valve can be opened to
pressure or exhaust, or may be closed as may be required.

page_text: By this means herein described, I can remove the spindle or plunger, as well
as the sleeve aforesaid, as also the leather or other packing, and inspect the
interior of, or repack, the valve, without in the least disturbing, or breaking the
pipe or valve joints, and thus effect a great saving of time and trouble, and the
inconvenience arising therefrom.
This improved valve may be adapted and used for controlling and regulating
the admission of pressure obtained from other than hydraulic power.
For the purpose of illustrating this invention, reference is made to the accom-
panying drawings, in which Fig. 1 represents a longitudinal section of a valve
as hereinbefore described; Fig. 2 shews a separate view of the sleeve, half in section,
and half in outside elevation; and Fig. 3 a detail of the spindle, also half in section
and half in elevation. The same letters refer to the same parts in the several
views, A being the body of the valve, B the inlet branch, Ĉ the branch to the
lift cylinder or other machine, D the exhaust branch. EE are swelled portions
opposite the said inlet and machine branches. F the sleeve with perforated
holes GG opposite the inlet branch. H is the valve spindle, worked from the
eye J, and having channels or perforations at K, K, and K2, the spindle being
made hollow in the case of perforations as shewn in portions L and L.
In the case of grooved channels along the surface of the spindle, the grooves
would correspond in length and position to the hollowed portion of the interior
of the spindle as shewn in Figs. 1 and 3.
In working the valve, the pressure inlet at branch B enters the hollowed por-
tion of the sleeve through the perforations GG. If the perforations K and K¹,
or the corresponding grooved portion of the spindle are within the said hollowed
portion of the sleeve, the water cannot escape and the valve remains closed.
To open the valve, the spindle is pushed forward, so that perforations K¹ are
opposite the branch C leading to the lift cylinder or other machine, when the
pressure is admitted to said branch. To open the valve to exhaust, the spindle
is withdrawn or pulled backward till the perforations or grooves K² are opposite
to said branch C, when the water escapes through said perforations or grooves K², .
and outwards through branch D.
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. The provision of an improved regulating valve for controlling the admis-
sion of water to hydraulic lifts or other hydraulic machines, whereby said
valves may be dismantled, inspected, or repaired, without disturbing or breaking
the joints of the same, or any of the branches or pipes adjacent or attached
thereto, substantially as and for the purpose herein set forth and described and
illustrated by the accompanying drawings.
2. The application of this invention to any form or kind of spindle or plunger
valve, substantially as and for the purpose herein set forth and described and
illustrated by the accompanying drawings.
Dated this 2nd day of January 1899.
MATTHEW THOMAS MEDWAY.