Improvements in Valves known as "Non Return Valves" Employed in Machinery or Apparatus for Raising and Forcing Fluids and in Water Supply Service Systems and for Analogous Purposes.
Year: 1887

page_text: Date of Application, 7th May, 1887
Complete Left, 7th Feb., 1888
Complete Accepted, 16th Mar., 1888
Improvements in Valves known as "Non Return Valves" Employed
in Machinery or Apparatus for Raising and Forcing Fluids and
in Water Supply Service Systems and for Analogous Purposes.
1, ASPLAN BELDAM, of 77 Gracechurch Street, in the City of London, in tho
County of Middlesex, Engineer do hereby declare the nature of my said invention to
be as follows:-
This Invention has for its object to improve metal valves employed in, or in
connection with pumps injectors and other like machines for raising and forcing
liquids and fluids, such as feed, bilge and other pumps, injectors and like machines, or
apparatus, so as to render them more useful, durable, and reliable than heretofore and
to prevent them beating against their seats and guards, or stops to an injurious
degree.
A valve with my Improvements applied thereto consists of a portion of a sphere at
that part where it rests upon its seat, that is, it is of spherical form at and near its
bottom and side. The valve is guided when rising off and coming to its seat by a
stem, or stalk of annular formation which works in a corresponding annular space,
or recess or recesses, which is, or are formed in the guide of the valve stalk. The
central and annular spaces, or recesses and the corresponding central and annular
metallic formations of the stalk and guide provide the means for a gentle settling, or
cushioning of the valve when coming to its seat, or against its guard, or stop and so
the valve is prevented from beating against its seat and guard and is rendered free
from injury through such causes.
The guiding of the valve being effected from above no lower stem, guide or wings
are required, or provided and consequently a free and unobstructed passage is
provided for the liquid, or fluid to flow by the valve, and the liability of solid
matter, or particles to lodge on the valve and prevent it coming to its seat is
obviated. This result is aided by the spherical configuration of the under side of
the valve.

page_text: Improvements in Valves known as "Non Return Valves" Employed
in Machinery or Apparatus for Raising and Forcing Fluids and
in Water Supply Service Systems and for Analogous Purposes.
I ASPLAN BELDAM, of 77 Gracechurch Street, in the City of London, in the
County of Middlesex, Engineer, do hereby declare the nature of my said 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 has for its object to improve metal valves employed in, or in
connection with pumps, injectors, and other like machines for raising and forcing
liquids and fluids, such as feed, bilge and other pumps, injectors and like machines, or
apparatus, and analogous purposes, so as to render them more useful, durable and
reliable than heretofore and to prevent them beating against their seats and guards, or
stops, to an injurious degree.
A valve with my Improvements applied thereto consists of a portion of a sphere at
that part where it rests upon its seat, that is it is of spherical form at and near its
bottom and side. The valve is guided when rising off and coming to its seat by a
stem, or stalk of annular formation, which works in a corresponding annular space, or
recess, or recesses which is, or are formed in the guide of the valve stalk. The central
and annular spaces, or recesses and the corresponding central and annular metallic
formations of the stalk and guide, provide the means for a gentle settling or
cushioning of the valve when coming to its seat, or against' its guard, or stop and
so the valve is prevented from beating against its seat and guard and is rendered
free from injury through such causes.
The guiding of the valve being effected from above no lower stem, guide, or wings
are required, or provided and consequently a free and unobstructed passage is pro-
vided for the liquid, or fluid to flow by the valve, and the liability of solid matter, or
particles to lodge on the valve and prevent it coming to its seat is obviated. This
result is aided by the sperical configuration of the underside of the valve.
It will be observed the word "valve" when used herein in its broader sense,
namely as an engineering term includes also the body of the valve, its stem and the
stem guide and guard.
Having thus specified generally the nature and objects of this Invention, its
description will first be proceeded with, with reference to the accompanying
Drawings, by way of explaining more fully the object, construction and effects of
the Invention.
The Drawings and the following description of them set forth special apparatus
designed to apply the features of construction and operation of valves according to
this Invention, the general nature of which has been above explained.

page_text: The letters and figures of reference marked on the Drawings correspond with those
used in the following explanation and like letters and figures are used in the views to
denote the same parts where they occur.
"
Figure 1 is a sectional elevation of a valve box of, say, an ordinary "feed pump'
of a steam generator provided with suction and delivery valves according to this
Invention.
Figure 2 is a cross section at the line X X through the valve box and valve stem.
Referring to the Drawings a designates the body of the valve, the annular stem,
C the annulus in which the stem works, and e and d the metal guides forming the
annulus c.
g is the valve seat and the valve box which it will be at once seen is of
the ordinary kind; i being the suction passage ¹ the passage communicating with the
plunger cylinder and the delivery passage. f designates the valve covers upon
which the guides d and e are formed. The lower end of the guide d serves as the
valve guard, that is when the valve lifts it strikes the lower edge and consequently
regulates the limit of lift of the valve.
The under surface, or face of the body a of the valve is of spherical form and
hollowed out as shown at its upper surface, the whole valve partaking of the form of
an inverted mushroom.
The operation of the valve and the effects of the construction described and
illustrated are as follows: When the valve is lifted off its seat by the fluid being
pumped, or forced, the annular stem brises in the annulus c, hence the fluid existing
in the annulus above the stem and in the space between the valve body a and the
guide e is compressed and is forced out, but the time taken to force out such fluid will
be of such a length, that the beat of the valve upon its stop (namely in the example
illustrated the guide d) will not be severe, or of such a nature as to injure either the
valve, or the stop; or in other words the valve is "cushioned on its upward
movement, or "lift." In a precisely similar, but converse manner, the valve is
prevented from beating too severely upon its seat, namely as the valve falls to its seat
the annular valve stem falls in the annulus c and thus a certain volume of the fluid.
has to pass into the annulus and the space between the valve and the guide e and the
time taken in admitting this quantity of fluid is the measure of time taken by the
valve in coming to its scat. The length of time the valve will actually take in either
of its two movements may be governed by the distance allowed to exist between the
sides of its stem b and the sides of the guides d and e, or by providing holes in the
guides e and d so that the fluid can pass into and out of the cushioning spaces, or by
equivalent means.
Regarding the feature of spherical formation of the face, or under side of the valve,
this formation affords a free and unobstructed passage for the liquid flowing by the
valve, and immunity from the liability of lodgment of solid matters existing in
connection with valves having lower stems, wings, or the like is secured. A further
effect is that whatever portion of the valve face comes to rest on its seat a true contact
of the face and seat is made, and hence any irregularities as to the position of the
valve when settled upon its seat is of no moment, no leakage past it taking place such
as occurs when ordinary non return valves do not fall in one particular position.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed I declare that what I
claim is
First. A valve of the type herein described consisting of a body having a spherical
formation of face and a guiding stem upon its upper surface, substantially as set
forth.
Second. A valve of the type herein described consisting of a body a and an annular
stem 6 such stem being combined with and operating in a corresponding annulus,
substantially as set forth.

page_text: Third. A valve of the type herein described consisting of a body a having a
spherical forination of face and an annular stem b, such stem being combined with and
operating in a corresponding annulus substantially as set forth.
.
Fourth. The construction of valve by which it is "cushioned” in lifting and falling
substantially as described.
Fifth. The combination of parts consisting of the spherically formed valve body a,
annular stem b, guides d and e, and annulus e constructed arranged and operating as
set forth with reference to the Drawings.
Dated this 6th day of February 1888.
ASPLAN BELDAM.
By Cheesbrough & Royston,
15, Water Street, Liverpool,
Patent Agents.