Improvements relating to Vessels for Containing Gas under Pressure.
Year: 1894

page_text: Date of Application, 18th May, 1894
Complete Specification Left, 18th Feb., 1895-Accepted, 23rd Mar, 1895
PROVISIONAL SPECIFICATION.
Improvements relating to Vessels for Containing Gas under
Pressure.
I, WILLIAM WALLER POPE, of Gotha Iron Works, Slough, in the County
of Bucks, Engineer, do hereby declare the nature of this invention to be as
follows:-
:-
My invention relates to vessels for containing gas under pressure.
The object of my said invention is to construct for such vessels an improved
automatic valve adapted to be placed in the outlet passage therefrom. The said
automatic valve is so arranged that it will permit the flow of gas through the said
passage at such speeds as it would possess under normal conditions of working, but
will close the passage in the event of the rate of exit of the gas being suddenly
increased, as, for instance, by the breakage of the pipe through which the gas
travels immediately after passing the valve, serious leakage at the joints of the
same, or by any other cause.
According to my invention I so arrange that the outlet passage shall pass
through a valve-seating, and in proximity to the said seating I place a ball-
valve or other valve adapted to close the said passage by bearing upon the said
seating.
The valve is so arranged that it will normally leave the passage in the seating
open, and will rest upon an adjustable support in a part of the passage through
which the gas flows towards the seating, which is in suitable contiguity to the valve.
The valve and the said part of the passage are so proportioned, relatively to each
other that the cross-sectional area of passage available for the flow of gas past
the valve is less than the cross-sectional area of the aforesaid passage through the
seating.
The said support is so arranged that it is readily adjustable at any time, from the
exterior of the valve casing or shell, for the purpose of determining the distance from
the seating at which the valve shall ordinarily rest. The said support may take the
form, for example, of a screw plug, adjustable in the screwed hole in the shell or
casing.
Leakage of gas from the said hole is prevented by a second plug screwed
thereinto externally to the first-named plug, and having flanges which hear upon a
ring of packing placed in a groove in the said shell or casing.
The valve, as long as the ordinary efflux of gas is not exceeded, remains upon its
support and away from the seating, but immediately upon the occurrence of any
improper increase of flow the valve will be forced against the seating to close the
passage, which it will keep closed until a pressure approximating to that existing
in the vessel is caused to force the valve off its seating, when it will resume its
former position on its support.
Dated this 18th day of May 1894.

page_text: Improvements relating to Vessels for Containing Gas under
Pressure.
I, WILLIAM WALLER POPE, of Gotha Iron Works, Slough, in the County
of Bucks, 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 vessels for containing gas under pressure, and has for its
object to construct for such vessels an improved automatic valve adapted to be
placed in the outlet passage therefrom. The said automatic valve is so arranged
that it will permit the flow of gas through the said passage at such speeds as it
would possess under normal conditions of working, but will close the passage in
the event of the rate of exit of the gas being suddenly increased, as, for instance,
by the breakage of the pipe through which the gas travels immediately after
passing the valve, by serious leakage at the joints of the same, or by any other
cause.
In the accompanying drawings, I have illustrated my invention.
Figure 1 is a vertical section of the end of the gas cylinder, pipe connection au:1
valve.
Figure 2 is a plan of the pipe connection and valve, and
Figure 3 is an end elevation of the same.
A is the gas cylinder; B is the outlet pipe; C is a valve between said outlet
pipe and the cylinder. I prefer to use a ball c for the valve proper which ball is
introduced through an opening e¹ in the valve casing and is supported by an
adjustable screw plug c². A plug is provided to close the opening c' and prevent
leakage of gas thereat, the said plug being flanged and packed as shown. is the
valve seat above the valve.
The valve is thus arranged to normally leave the passage through the seat open,
and to rest in a part of the passage through which the gas flows towards the
seating, and in suitable contiguity to the seat. The valve and the said part c³ of
the passage are so proportioned, relatively to each other that the cross-sectional
passage available for the flow of gas past the valve is less than the cross-
sectional area of the passage through the seating.
area of
The support may be readily adjusted at any time by removing the plug and
then turning the plug e in the proper direction. By this means the distance from
the seating at which the valve rests may be adjusted to suit requirements.
As long as the ordinary efflux of gas is not exceeded the valve remains upon
its support and away from the seating, but immediately
upon the occurrence of any
improper increase of flow of gas the valve will by the rush of gas be forced against
the seating and will close the passage to the outlet pipe B. The passage will
remain closed until the pressure within the pipe B approximates to that existing in
the vessel A whereupon the valve will fall away from its seat and will resume its
former position on the support c².
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
claim is :-
1. The combination with a gas vessel of a valve chamber such as c³ and a valve
adjustably supported therein in proximity to a valve seat, substantially as, and for
the purpose, specified.

page_text: 2. The apparatus constructed as described with reference to the drawings, and
operating as specified.
Dated this 18th day of February 1895.
:
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.