Improvements in and relating to Valves.
Year: 1891

page_text: Date of Application, 1st Sept., 1891-Accepted, 10th Oct. 1.91
COMPLETE SPECIFICATION.
Improvements in and relating to Valves.
I, ADOLF LUDWIG HEINRICH KNOOP, of Minden, Westphalia, in the Empire
of Germany, Manufacturer, 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 valves.
The valve constructed according to the said invention serves for the outlet as
well as for the inlet of liquids or gases under pressure, and for the regulation of
the same.
Several forms or modifications of the same are represented in the accompanying
drawing. It is more especially designed to be applied to vessels for carbonic acid,
in order to introduce the carbonic acid or enable it to be gradually discharged.
For this purpose the plate shaped valve a is in all cases guided in the valve box
by means of the rods a' and a² so as to move vertically.
The lower of these rods is adapted to slide in a central opening of the disc b
whilst the upper rod extends through the valve opening.
Holes in the disc band
the cross shaped section of the rod permit the passage of the liquid.
The plate-shaped valve a is provided with a packing ring in order that it shall
shut off tightly.
By means of the spring the valve is pressed against its scat.
For using the valve the nozzle c is connected to the vessel for the liquid under
pressure. When the liquid under pressure is let out it opens the valve auto-
matically passing in the direction of the arrow 2 and leaving the valve through the
nozzle d.
When the liquid is let in it must pass in the direction of the arrows 1. As
however in this case the liquid under pressure acts in the same direction as the
spring and therefore tends to close the valve it is necessary that the latter shall
be opened by mechanical means which is effected very simply in the manner
represented by Figure 5. In this case I arrange in the upper part of the valve
box a spindles provided with a hand wheel and adapted to be screwed up and
down in the stuffing box h. When the said spindle is screwed down it presses
against the rod a' thereby keeping the valve open. The inlet can then take place.
After screwing the spindle s backwards the valve is again ready for the outlet of
the carbonic acid.
Such a valve may be employed in combination wit's a cock which is provided in
the pipe connected with the nozzle /. In the case of a carbonic acid apparatus
this cock may be made accessible from the bar. With a valve adjusted for the
discharge this is closed as soon as the pressure behind the valve plate reaches a
certain height which is less by the pressure exerted by the spring than the pressure
in the vessel for the carbonic acid.
In the modification represented in Figure 2 the spindles does not act directly
upon the valve rod a¹ but upon the diaphragm held between two flanges and
separating the spindles from the spindle. The latter strikes against the upper
end of the valve rod a'. The operation of this device is similar to that of the
device shown in Figure 5. For many purposes this arrangement is advantageous
because the stuffing box is dispensed with.
The tightly fitted diaphragm i prevents the carbonic acid acting on the screw
thread and thus rendering the operation more difficult.
A. further modification is shown in Figure 1. In this case the diaphragm i is
pressed downwards by the spring k. On the plate is fastened a bolt against
which the spindle s acts. When turning back this spindle the spring k tends to
open the valve a. As however the power of the spring k is weaker than that of

page_text: the spring it cannot open the valve but only diminish the effect produced by the
pressure of the spring f. The spring & can be more or less compressed through the
medium of the screw cap p so that the pressure exerted against the diaphragm i is
correspondingly changed and the valve a is forced with greater or less pressure
against its scat. In this manner a convenient adjustment of the pressure with
which the carbonic acid shall be discharged is rendered possible. The acid passes
in the direction indicated by arrows 2.
If this valve is to be used for admission the spindles is screwed down so that
the diaphragm i is also pressed downwards and the bolt y opens the valve a. The
spindles is placed in the screw cap p.
As shown in Figure 4 the adjusting device may be modified by substituting for
the screw cap p of Figure 1 a screw-threaded tube q. which for enabling the con-
venient adjustment of the pressure is provided with the hand wheel q'. The
spindles is in this case in the aforesaid tube y and is turned by means of a key
which is placed on the spindle s presenting a square at the top. "Very convenient
is the arrangement represented in Figure 3 in which the spindles and also the
tube for compressing the spring / may each be turned by a hand wheel. In this
case the tube which surrounds the spring is arranged to move up and down in the
tubular extension m on the valve body, but is prevented from turning by the
screw n. Accordingly by turning the socket o which is adapted to turn on
the extension m through the medium of the hand wheel o' the tube is moved up
and down so as to effect the adjustment of the spring k.
v
As regards the arrangements illustrated in Figures 1 and 3 it may be observed
that they are particularly suitable for the inlet of liquids under pressure on the
under side of the diagram i being arranged a valve which on screwing down the
spindle s is pressed against the seat w. By reason of this arrangement the carbonic
acid on being admitted in the direction of the arrow 1 cannot act upon the
diaphragm and cause injury to the same.
Instead of the spindle s use may be made of a pressing spindle which is forced
against the diaphragm or the bolt ¹ either by adjustable weights or by means of
a hand lever or other adjusting device. Such a device is especially advantageous
when it is desired to be able to quickly stop or establish the action of the valve.
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 for the inlet and outlet of liquids or gases under pressure, in
which an adjustable spindle s can be forced, either directly (Figure 5) or through
the medium of a diaphragm i (Figure 2) which tightly closes the valve casing,
against the rod a¹ of the valve a in such a manner that the latter remains con-
tinually open, thereby enabling the liquid to be admitted in the direction of the
arrows 1.
Second. In the valve having a diaphragm i, characterized in the first claim, the
arrangement of a spring k which presses against the diaphragm, and acts against
the pressure of the spring pressing the valve a so that by putting the spring k
under tension through the medium of the screwing devices p (Figure 1),
loo (Figure 3) or 9 q' (Figure 4) the pressure-regulating action of the valve a is
controlled.
Third. In the valves (Figures 1-4) characterized in the first and second claims
the arrangement of a valve v w below the diaphragm i which is closed by screwing
down the spindle s for the purpose of admitting the carbonic acid (in the direction
of the arrows 1,) thereby keeping the pressure of the liquid from the diaphragm i.
Dated this 1st dove of Contamhan 1001
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.