Year: 1887

page_text: I, FRIEDRICH WILHELM AUGUST KIRSTEN, of 4" Simeonstrasse Berlin, in the
Empire of Germany, Chemist, 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 stop valves and has for its object to prevent the escape of
carbonic acid or other gas under high pressure when the valve cone does not ensure
tightness, or when it is not completely upon its seat.
For this purpose a channel or groove is so arranged in the spindle carrying the
valve cone, that when the latter is upon or nearly upon its seat, the discharge
orifice in the spindle is within or below the packing placed above the valve cone,
and is kept closed by the said packing, whilst, when the valve is fully open, the
discharge orifice is above this packing and the admission orifice below the same.
In the accompanying drawing
Figure I is a longitudinal section of a stop valve constructed according to this
invention and in its closed position.
Figure II is a similar view but showing the valve in its open position.
Figure III is a section on the line A, B, Figure I.
Figures IV, V and VI illustrate modifications of the spindle.
Figure VII is a longitudinal section illustrating a modification of the stop valve.
Figure VIII is a section of the same on the line C, D.
Figure IX is a longitudinal section illustrating another modification, the valve
being closed.
Figure X is a section on the line E F Figure IX.
Figure XI is a section on the line G H Figure IX.
a is the valve casing, and is the valve spindle which is adjustable by means of a
hand wheel, and is hollow below, carrying the movable prolongation c with the valve
cone d. The valve cone d is as inclined as possible for the purpose of more easily
obtaining a tight joint, and the prolongation is made very thin.
In the prolongation c is formed a channel e, the admission orifice and the discharge

page_text: orifice of which must be far enough from each other for the discharge orifice, when
the valve is open, to be above the packing that ensures a tight joint around the pro-
longation, while the admission orifice below the packing remains open; whereas,
when the valve cone is upon or in proximity to its seat, the admission orifice below
the packing remains open, whilst the discharge orifice is within or below the
packing Therefore the passage for the fluid is closed, so that even when the valve
seat is injured the carbonic acid or other
gas cannot pass out.
The packing is firmly tightened by means of the nut 9: The prolongation c,
suspended in the known manner from the spindle b and can then turn therein.
The spindle is provided with screw-threads, and, when the hand wheel / is turned,
is screwed up and down in the nut i, and thus causes the valve to open or close. In
order that the nut i shall not be screwed out should the spindle become fixed it is
provided below with projections which engage with suitable notches, in the bearing
surface (Figures I and II).
Above this nut is arranged the packing for the spindle in the known manner.
The channel in the prolongation according to Figure I is made by boring
through this prolongation from above as far as the point for the admission orifice,
and, after the admission and discharge openings are formed, closing the bore down
to the discharge orifice.
In Figure IV a steel tube is employed, into the lower end of which the valve
cone d is screwed, whilst it is completely and tightly closed at its upper end by
a plug.
The wall of the tube is bored through at suitable points to form the admission and
discharge orifices. The arrangement shown in Figure IV has the advantage that
the valve can, if necessary, be easily renewed.
As shown in Figure VI the prolongation is supposed to be made of metal which
does not rust, and a valve cone of steel being screwed into it. In this arrangement
the channel e is bored from below. The rusting or fixing of the prolongation c
in the packing is thus obviated, and the valve cone can be easily exchanged as in
Figure IV.
The arrangement of a groove as shown in Figure V in lieu of the channel e is not
so advantageous in practice as the channel but it will fulfil its object.
In the modification of my invention shown in Figures VII and VIII the packing is
placed below the spindle carrying the prolongation c with the valve cone d; and the
packing below the discharge orifice as well as the packing" above the same are firmly
tightened by means of the nut g. Between the packings and is a metallic bridge =
which, when the valve is open, permits the carbonic acid to pass out, and it serves at
the same time as a cover for the packing f, and transmits the pressure exerted by the
nut upon the packing to the lower packing f
With this modification the packing of the valve spindle can be altogether dispensed
with, and the safe construction and permanently good action of the stop valve are
obtained. Moreover, the valve can be mounted much more easily, as here the head of
the prolongation c and the nut g are free.
The modification of my invention represented in Figures IX, X, XI differs from
the arrangement shown in Figures VII and VIII, the nut g being dispensed with,
and the packings and f¹ compressed directly by the nut i which acts upon the
follower 7.
The bridge, however is provided as in the arrangement shown in Figures VII
and VIII.
The head of the prolongation c of the spindle is introduced into groove or
recess m arranged at the lower end of the said spindle band having
a lateral
opening n. The part c can in this manner be safely fixed to the spindle so that it can
turn. Above the valve cone d is arranged a projection o which prevents the spindle
being screwed out when the valve is opened.
By the use of these modifications the packing f and f1 can, by turning the nut i be
tightened from outside; and the groove or recess for fastening the prolongation c of the
spindle b is prevented from being torn off or out; and the spindle 6 is prevented from

page_text: being quite turned out as above described. Furthermore, it is possible to tighten the
packings at any time without being obliged to previously remove the upper part
of the valve.
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 in
respect of my improvements in high pressure stop-valves is:-
First. The employment of a prolongation carrying the valve cone and provided
with a channel or a groove, the admission and discharge orifices of which are so
arranged that when the valve is open, the discharge orifice is above and the admission
orifice below the packing that ensures a tight joint around the said prolongation,
whereas, when the valve cone is open or in proximity to its seat, the discharge opening
is within or below the packing, so that the passage for the fluid is closed while the
admission orifice remains open, for the purpose of preventing, when the valve is not
quite closed on the valve seat or valve cone has been injured, the carbonic acid or
other gas under high pressure from escaping.
Second. The arrangement of the packings," for the prolongation c, which
packings are separated by a hollow bridge or intermediate piece in such a manner
that both packings can be tightened by means of one nut g, the carbonic acid, when
the valve is open, being permitted to pass out between the packings through the said
hollow intermediate piece.
C
Third. In the modification characterized in the second claiming clause the employ-
ment of a nut i which is moved from outside and by means of the follower q, presses
upon the packings, the valve rod c being carried at its upper end in an annular
groove m on the lower part of the spindle, and provided at its lower end with a
projection o, for the purpose of enabling the packings to be tightened at any time and
preventing the spindle from being entirely screwed out.
Dated this 10th don në Manch 1037
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.