An Improved Stop Valve.
Year: 1890

page_text: Date of Application, 1st May, 1890
Complete Specification Left, 2nd Feb., 1891-Accepted, 7th Mar., 1891
An Improved Stop Valve.
A communication to me from abroad by GUSTAV ADAM, Engineer, of Sebnitz,
in the Empire of Germany.
I, EDMUND EDWARDS, of the firm of Edwards & Co., Patent Agents and
Engineers, of 35, Southampton Buildings, Chancery Lane, in the County of
Middlesex, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved stop valve and it has for its object a
novel method of construction by which the wear and tear of the tightening surfaces
both of the valve itself and of the valve seat are reduced.
In the stop valves usually employed the said surfaces are very liable to wear and
tear by the steam or other fluid acting directly against their faces, and in order to
prevent this according to the present invention, suitable rings are arranged upon
the valve itself and further, in combination with the valve, a bell or sliding ring is
provided which closes the passage of the steam or fluid up to the moment when the
valve proper
has been fully opened or lifted from its seat.
The valve rod is provided with a screw thread passing through a tapped sleeve or
nut connected to a hand wheel by turning which the said rod together with the
valve is raised or lowered. To the lower end of the rod the valve proper is
secured, at or near the upper portion of which a cylindrical ring is formed and
round the guide webs or rings of the valve at or near their lower end a similar ring
is formed or secured. The said rings serve to prevent wear and tear of the valve
and seat, as also to steady the guiding of the valve within its seat. On the valve
rod at a short distance above the valve, a ring or bell is carried, its centre being
keyed to the rod. The said ring or bell rises and falls with the rod and closely fits
in a cylinder in the circumference of which a suitable number of apertures are pro-
vided which apertures form the passage for the steam or fluid to flow through the
valve.
When the valve is closed the apertures in the cylinder are also closed by the ring
or bell the upper edge of which extends beyond the said apertures. When the
valve is opening and rising with the rod, the apertures remain closed up to the
moment when the valve has reached the end of its course, the lower edge of the ring
or bell then moves past the said apertures and leaves them open. The steam or
fluid can now freely pass through the said apertures and through the open valve
seat. The steam or fluid entering through the apertures flows freely past the upper
portion of the valve and no injury is done to the tightening surface of the said
valve. When the valve is open the lower ring of the valve takes a position
opposite to the upper edge of the valve seat and the said rim or edge of the seat is
thereby protected against any injury from the direct action of the passing steam or
other fluid.
nis 1st day of May LOVE.
EDWARDS & Co.,
35, Southampton Buildings, Chancery Lane, London,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
An Improved Stop Valve.
A. communication to me from abroad by Gustav Adam, Engineer, of Sabnitz, in
the Empire of Germany.
1, EDMUND EDWARDS, of the firm of Edwards & Co., Patent Agents and
Engineers, of 35, Southampton Buildings, Chancery Lane, in the County of Middlesex,
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 and accompanying drawing, that is to say :—
This invention relates to an improved stop valve and it has for its object a novel
method of construction by which the wear and tear of the tightening surfaces both
of the valve itself and of the valve sent are reduced.
In the stop valves usually employed the said surfaces are very liable to wear and
tear by the steam or other fluid acting directly against them, and in order to prevent
this, according to the present invention, suitable rings are arranged upon the valve
itself, and further, in combination with the valve, a bell or sliding ring is provided
which closes the passage of the steam or fluid up to the moment when the valve
proper has been fully opened or lifted from its sent.
In the accompanying drawing, Figures 1 and 2 are respectively, a vertical section
of the valve in the closed and opened position, Figure 3 is a vertical section through
the valve box, and Figure 4 à cross section through the cylinder K above the
valve.
The valve rod A is provided with a screw thread passing through a screwed sleeve
or nut B connected to a hand wheel (by turning which the said rod together with
the valve is raised or lowered. To the lower end of the rod A. the valve proper D is
secured at or near the upper portion of which a cylindrical ring E is forined and
round the guide webs or wings I of the valve. at or near their lower end a similar
ring G is formed or secured. The said rings E and G serve to prevent wear and
tear of the valve and seat as also to steady the guiding of the valve D within its
scat H.
On the valve rod A at a short distance above the valve D a ring or bell dis
carried, its centre being keyed to the rol. The ring or bell rises and falls with
the rod A and closely fits in a cylinder K, in the circumference of which a suitable
number of apertures Lare provided which apertures form the passage for the steam
or fluid to flow through the valve.
When the valve is closed as shewn in Figure 1 the apertures in the cylinder K
are also closed by the ring or bell the upper edge of which extends beyond the
said apertures L.
When the valve is opening and rising with the rod A, the apertures remain
elosed up to the moment when the valve D has reached the end of its course. The
lower edge of the ring or bell then moves past the said apertures and leaves them
open as shown in Figure 2. The steam or fluid can now freely pass through the said
apertures and through the open valve seat 11.
The steam or fluid entering through the apertures L flows freely past the upper
portion of the valve D and no injury is done to the tightening surface of the said
valve.
When the valve is open, Figure 2, the lower ring G of the valve D takos a
position opposite to the upper edge of the valve seat F and the rim or edge of the
sent is thereby protected against any injury from the direct action of the passing
steam or other fluid.
Having now particularly described and ascertained the nature of the said
invention, and the manner in which the same is to be performed, I declare that what
I claim is
A valve D provided with cylindrical rings E and G and a bell or ring J carried

page_text: above the said valve by the valve-rod A, the said bell or ring being arranged to
slide in a cylindrical casing K provided with apertures L, through which the steam
or fluid is to pass, which apertures are kept tightly closed by the said bell J as long
as the valve is not fully opened, substantially as and for the purpose set forth, and
shewn.
D
...
1
1001
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicant.