Improvements in Valves.
Year: 1889

page_text: COMPLETE SPECIFICATION.
Improvements in Valves.
I, NEWNHAM BROWNE, of 73, Cheapside, in the City of London, Fellow of the
Institute of Patent Agents do hereby declare the nature of the said invention
for "IMPROVEMENTS IN VALVES," which invention has been communicated to me by
Alfred Vater, of Flora Strasse 6, Dresden-A, in the Empire of Germany, Mine
Agent, to be as follows:-
This invention relates to a valve to be used chiefly for such liquids as tond, by
their movement through such valves (when these latter are connected with a screw-
spindle) to injure the valve spindle and valve.
The accompanying drawing shows a vertical section through such a valve.
Upon the end of a pipe A a cylinder a is secured by screw-threads as shewn in
the drawing or otherwise. The cylinder has a male screw on the outside and it's
lower surface is turned true. b is the valve chamber the female screw thread
whereof engages with the male thread, or cylinder, a. In the chamber or casing b,
lugs carry an annular valve support c. In this the mushroom-valve d is mounted,
it's hemispherical head being so adapted to the rounded upper edge of the support
that it will readily fall into proper position for closing the valve. The lower part d
of the valve projects downward and limits the movement of the valve d in the
support c. The flat top or face of the valve may be covered with a thickness of
suitable material such as leather, rubber, or the like. When the valve-casing b is
screwed up this washer of leather, India-rubber, or the like is forced against the level
face of the cylinder a and this closes the valve.
Between the casing b and the valve support c there is a free space obstructed only
by the lugs c, and through it the liquid passes when the valve is open.
A shoulder on the casing 6 bearing against the upper edge of the cylinder a
limits the movement of the chamber 6 and thus determines the furthest extent to
which the valve can be opened.
The drawing shows the valve arranged for application in a vertical position, with
trifling modification it may be used in horizontal position also.
A special advantage claimed by the inventor for this arrangement over those
wherein the valve is actuated by a scrow spindlo loosely connected therewith is that
the mobility of the valve, requisite to enable it to close tightly, can not be impeded
by the deposit of solid particles in and at the connection, this can the less take place
with this valve as no deposits can form at the critical point. Moreover it has to be
noted that in valves with spindles the connection with the latter is gradually destroyed
so that ultimately the valve can not be lifted and hence not opened.
A further feature is that it requires but little "fitting" as only the closing surfaces
and the connection with the pipe require to be true, so that it becomes so cheap as
to permit, is's use in many cases where economy hitherto compelled the use of less
satisfactory and durable devices.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed as communicated to me by my
foreign correspondent I declare that what I claim is:
A valve-arrangement arranged (for the purpose of maintaining free play of the
valve) in such manner that the hemispherical lower face of the valve head loosely
rests in an annular support ce provided in and concentric with the chamber 6 wherein
it is supported by lugs c², the space between the casings or chamber band the annular
support o serving for the passage of the liquid.
Dated the 17th day of December 1889.