Year: 1886

page_text: Date of Application, 9th Sept., 1886.
Complete Left, 2nd June, 1887.
Complete Accepted, 5th July, 1887.
I WILLIAM POOLE SINGLETON of 38 Smith Terrace, Smith Street, Chelsea, in the
county of Middlesex, Engineer do hereby declare the nature of this invention to be
as follows:-
My invention relates to improvements in what are known as screwdown valves or
cocks and the invention consists in the means hereinafter described for holding or
mounting the material known as vulcanite or ebonite which is sometimes employed
to form the face of such valves or cocks.
In carrying out my invention I employ a ring or plate of vulcanite moulded or
turned to the form of a truncated cone in cross section, annular grooves being moulded
or cut in the wider face of the ring and transverse grooves being also cut therein if
required. The ring or plate so prepared is placed in the metal foot of the valve which
foot is recessed to fit the larger diameter of the ring or plate and is provided with
holes through the sides or top; similar grooves to those in the vulcanite ring or plate
can be made in the metal foot which holes and grooves serve to allow of the vulcanite
being relieved of any internal pressure between the faces of the ring and recess that
might tend to force the ring or plate out of the recess.
The part of the metal foot surrounding the sides of the ring or plate is pressed or
closed onto the vulcanite by pressure in a lathe with a suitable tool or by the use of a
punch or die of the required form thereby holding the vulcanite in position; between
the end of the screw spindle and foot of the valve is placed a curved spring plate inade
of sheet metal which exerts a continuous and elastic pressure of the vulcanite on the
seating of the valve.
Dated the 0th
1000
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicant.

page_text: I, WILLIAM POOLE SINGLETON, of 38 Smith Terrace, Smith Street, Chelsea, in the
county of Middlesex, 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 what are known as screw-down valves or
cocks, and the invention consists mainly in the means hereinafter described for holding
and mounting the material known as vulcanite or ebonite.
In carrying out my invention I employ a ring or plate of vulcanite moulded or
turned to the form of a truncated cone in cross section one or more annular grooves
being moulded or cut in the wider face or upper surface of the ring and one or more
transverse grooves being also formed therein if required. The ring or plate so
prepared is placed in the metal foot of the valve which foot is recessed to receive the
ring or plate and is provided with relief holes through the sides or top; similar
grooves to those in the vulcanite ring or plate can be made in the metal foot which
holes and grooves allow the vulcanite ring or plate being relieved of any internal
pressure between the faces of the ring or plate and recess that might tend to force the
said ring or plate out of the recess.
When the ring or plate is moulded or turned as above named and placed in the
recess the parts of the metal foot adjacent to the sides of the ring or plate are pressed
or closed on the same by pressure with a suitable tool or by the use of a punch or die
of the required form so as to hold the vulcanite in position; or instead of fixing the
vulcanite ring or plate as described, the recess in the foot of the valve can be formed
of the required shape and the vulcanite or ebonite ring or plate moulded in it while in
the soft state. Instead of grooving the vulcanite ring or the foot of the valve a ring
or plate of wire gauze can be placed at the bottom of the recess which wire gauze with
the holes in the valve foot serves to relieve the internal pressure hereinbefore
described.
Between the end of the valve spindle and foot of the valve I place a curved spring
plate made of sheet metal which exerts a continuous and elastic pressure on the
vulcanite and seating of the valve.
In order to enable my invention to be fully understood, I will proceed to describe
how the same can be carried into practice by reference to the accompanying drawing
in which figure 1 represents a vertical section of a screw-down valve or cock
constructed according to my invention the vulcanite or ebonite used for forming the
face of the valve being in the form of a ring which is turned or moulded to the
required form before being placed in the foot of the said valve and the relief holes
being formed in the top of the valve foot. Figure 2 represents a detached plan of the
foot of the valve. Figures 3 and 4 represent a sectional elevation and a plan
respectively of the foot of the valve shewing the same provided with horizontal relief
holes. Figure 5 is a similar view to figure 3 but shewing the foot of the valve before

page_text: the sides of the recess are closed to hold the vulcanite or ebonite ring in place.
Figures 6 and 7 represent a central section and a plan respectively of the vulcanite or
ebonite ring. Figures 8 and 9 are similar views to figures 3 and 4 but shewing the
vulcanite or ebonite in the form of a plate. Figure 10 is a central section and
figure 11 a plan of the said plate. Figures 12 and 13 are similar views to figures 3
and 4 but shewing the arrangement I adopt when moulding the vulcanite or ebonite
ring in the recess in the foot of the valve. Figures 14 and 15 represent a central
section and a plan respectively of the curved spring plate which I insert between the
end of the valve spindle and the foot of the valve. Similar reference letters indicate
similar or corresponding parts throughout the several figures of the drawing.
Referring to figures 1 to 7 a, is the vulcanite or ebonite ring moulded or turned
into the form of a truncated cone in cross section as shewn clearly in the detached
views at figures 6 and 7; b, b, represent the annular groove or grooves moulded or
cut in the upper or wider face c, of the ring a; 61, 6, represent transverse grooves
which I sometimes form therein; d, is the metal foot of the valve and e, figure 5, is
the recess in the underside of the same large enough to receive the ring a; f,f, are
the holes provided in the foot d, the said holes being formed through the top as in
figures 1 and 2 or through the sides as in figures 3 to 5; 9, 9, are the annular grooves
in the foot of the valve d, which may correspond with the annular grooves b, b, in the
ring or plate a; the grooves b, b¹, 9 g, and holes f, f, allowing for the relief of any
internal pressure between the faces of the ring a, and recess e, that might tend to force
the ring out of the recess. It will be obvious that either the grooves b, b³, or
the grooves g, g, may be dispensed with.
The foot d, of the valve being formed with a recess as hereinbefore described the
ring a, figures 6 and 7, is placed in the said recess e, as shewn in figure 5, and the
parts h, h, of the metal foot d, of the valve adjacent to the sides of the ring a, are
pressed or closed on the same by pressure in a lathe with a suitable tool, or by the use
of a punch or die of the required form, thereby holding the said ring or plate in
position as shewn in figures 1 and 3.
Figures 8 and 9 shew the foot d, of the valve formed to receive, and provided with
a plate a, of vulcanite or ebonite instead of a ring as illustrated in figures 1 to 5, f,
representing the transverse relief hole formed half in the plate a, and half in the foot d,
of the valve; the construction otherwise is the same as that hereinbefore described
when referring to figures 1 to 7.
In figures 12 and 13, a is the vulcanite or ebonite ring which as before mentioned I
sometimes form by moulding it in the recess e, in which case the recess is formed in
the metal as shewn in figures 12 and 8; i, is the ring or plate of wire gauze
which I place at the bottom of the recess e, and which with the holes f, f, in the valve
foot serves to relieve the internal pressure hereinbefore referred to.
It will be obvious that when I use wire gauze no grooves are required in the
vulcanite or in the foot of the valve.
7, is the curved spring plate made of sheet metal (shown detached in figures 14
and 15) which I place between the end of the valve spindle A and the foot d, of the
valve, as shewn in figure 1, which spring plate causes the ring or plate a, when the
valve is screwed down, as in figure 1, to exert a continuous and elastic pressure on
the valve seating B.
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. Mounting the vulcanite or ebonite faces of screw-down valves or cocks in the
metal foot of the valve substantially in the manner hereinbefore described and
illustrated in figures 1 to 13 of the accompanying drawing.
2. Providing the upper surface of the vulcanite or ebonite employed to form the
faces of screw-down valves or cocks or the surface of the valve foot with grooves in
communication with openings in the valve foot for relieving the vulcanite face from
internal pressure substantially as hereinbefore described and illustrated in figures 1
to 11 of the accompanying drawing.

page_text: 3. The use in place of grooves in the vulcanite face or the foot of the valve, of wire
gauze substantially as hereinbefore described and illustrated in figures 12 and 13 of the
accompanying drawing.
4. In a screw-down valve or cock the use of an elastic or spring plate, such as that
shewn in figures 14 and 15, in the manner and for the purpose hereinbefore described
and illustrated in figure 1 of the accompanying drawing.
5. The improved valve or cock hereinbefore described and illustrated in figure 1 of
the accompanying drawing, and the modified forms of the foot for valves or
cocks described and shewn in figures 3, 4, 8, 9, 12, and 13, of the accompanying
drawing.