Improvements in Water Valves.
Year: 1899

page_text: Improvements in Water Valves.
I, ARTHUR MILNER, Engineer, of Brookfield Cottages, Carlton, near Barnsley,
in the County of York, do hereby declare the nature of this invention to be as
follows:- -
My invention relates to an improved form and construction of water valve for
use especially in exposed situations where ordinary valves are likely to become
stiff and difficult to work through their stuffing glands or other exposed parts
becoming clogged with dust and dirt.
My invention consists in a new form and construction of valve in which all
the operating parts are entirely inside the valve chest, the valve being operated
hydraulically by means of a suitable small three way plug cock or valve. The
opening of the main valve can be regulated perfectly, I find, by means of this
three-way plug cock or valve.
In carrying my invention into effect according to one modification as applied to
a knee valve for use on a water pipe used for quenching coke in coke ovens,
the lower part of such valve I make of any usual construction, having, for
instance, a bush provided in the bottom part of the chest, the bush having a
valve seat and carrying a guide for the valve spindle. The valve seat may be
made tight by means of a leather or other washer. The valve spindle projects
downwards, and. passes into the guide. The spindle above the valve is carried
into a short cylindrical chamber provided in the upper part of the valve chest,
above the water outflow. This short cylindrical chamber is turned out, and on
the upper end of the valve spindle a piston is fixed having a cup leather facing
outwards. This piston works in the short cylinder. I provide the cover of
the valve chest with an inwardly projecting ring which will act as a stop to the
piston on the upper part of the valve spindle, and prevent the valve rising too
high. From this cover I carry a pipe to the upper end of a three way T plug
cock.
The side branch of this I connect to the centre part of the main valve, that is,
into the valve chest below the piston and above the valve proper. The lower
end of the plug cock I connect to the water-way below the main valve. If, now,
the plug cock be in such position that the side branch is closed, and the way
opened straight through, water passes from below the main valve, through this
hye-pass, into the chamber above the piston, until equilibrium is established
between the pressure below the main valve and that above the piston. Now as
the piston is made of greater area than the valve proper, the pressure holds the
valve shut. If the plug cock be now turned, so that it closes the pipe from below
the valve, and opens the waterway from above the piston into the side branch,
the pressure below the main valve will raise the latter, as the pressure above the
piston has been released, and as the valve opens it will displace water from above
the piston into the space between the main valve and the piston. I find that
the amount of opening of the valve can be perfectly regulated by suitably
graduating the opening of the plug cock.

page_text: I may modify the construction of the valve by forming the plug cock and its
communicating pipes in the casting of the valve chest. I find that this valve
overcomes the difficulties of the ordinary screw down valves where subjected to
the action of grit and dust, as it has no openings where grit can enter, such as
stuffing boxes, screws or the like.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester,
Agents.
Improvements in Water Valves..
I, ARTHUR MILNER, of Brookfield Cottages, Carlton, near Barnsley, in the
County of York, 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 an improved form and construction of water valve for
use especially in exposed situations where ordinary valves are likely to become
stiff and difficult to work through their stuffing glands or other exposed parts
becoming clogged with dust and dirt.
My invention consists in a new form and construction of valve in which all
the operating parts are entirely inside the valve chest, the valve being operated
hydraulically by means of a suitable small three way plug cock or valve. The
opening of the main valve can be regulated perfectly, I find, by means of this
three-way plug cock or valve.
In the accompanying drawings:-
Fig. is a sectional elevation of a valve constructed according to my inven
tion; and
Fig. 2 is a similar view of a modified form of valve.
Referring to Fig. 1 which represents a valve adapted for use in controlling
the supply of water for quenching coke in connection with coke ovens, the valve
body or casing A is fitted with a cover B, and the casing underneath this cover
is bored out to receive a piston C which is formed upon the upper end of the valve
(stem D. This piston is provided with a packing disc E, of leather or other
suitable material fixed to it by means of a washer F, and clamping nut G. The
valve H which controls the thoroughfare through the casing is of the ordinary
type having a flat seating surface formed by a leather packing washer H. The
ulet branch I is put in communication with the chamber J underneath the
valve cover, by means of a passage K formed within the valve body. This passage
communicates with the valve chest under the piston C by an opening K¹ con-
trolled by a valve L, the spindle of which passes through the removable stuffing
box L, and is fitted with an operating handle M.
When the valve L is closed, water passes from the inlet branch I through the
passage K into the chamber J, and, as the piston C is of greater area than the
valve opening, the valve H is thus held automatically to its seat. When it
is desired to allow water to flow through the casing the valve L is opened, thus
relieving the pressure upon the upper side of the piston, through the passage K¹.
The water pressure under the main valve H then raises the said valve from its

page_text: seat. The travel of the valve is limited by a ring stop B formed on the lower
side of the cover.
In the construction shewn in Figure 2, the valve H is provided with a remov-
able bushed seat A carrying a guide ring A2 for the downwardly projecting
part D of the valve stem. Instead of constructing the communicating passage
between the inlet I and chamber J, within the body of the casing it is formed
by separate pipe connections K and K³, which are coupled to a three-way cast-
ing K, one of the branches of which screws into the valve body and communi-
cates with the interior thereof through the opening K³. At the junction of
the casting is fitted a three-way plug cock N by means of which the passage
of the fluid is controlled. With the cock in the position shewn the pressure
of water operates on the piston C to hold the valve H upon its seat; and when
the cock is turned so as to put the chamber J into communication with the
valve-chest, the pressure on the piston C is relieved and the main valve H opens
as before.
I find that by suitably controlling the amount of opening of the auxiliary
valve or plug cock, the opening of the main valve H can be perfectly regulated.
By constructing a valve as above described it can be used with great advantage
in exposed situations in which it is subjected to the action of dust and dirt
such as for instance in connection with coke ovens as it has no exposed screw
threads or glands in which the dust can accumulate. The frequent renewals
or re-fitting of the working parts which are necessary with the ordinary screw
down valves, under such circumstances, are thus avoided.
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. A valve in which the main fluid passage controlling part and its operating
connections are enclosed entirely within the valve casing the operation of said
part being effected by means of the fluid pressure and controlled by an auxiliary
valve, substantially as, and, for the purposes, hereinbefore described.
2 The improved construction and arrangement of valve, substantially as
herein before described and illustrated in the accompanying drawings.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester,
Agents.
VITTO
ट
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester,
Agents.