Improvements in Pressure-regulating Valves.
Year: 1891

page_text: COMPLETE SPECIFICATION.
Improvements in Pressure-regulating Valves.
I, ADOLF LUDWIG HEINRICH KNOOP, of Minden, Westphalia, in the Empire
of Germany 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 intended for the regulation of the pressure of
gases or liquids passing therethrough.
In the accompanying drawings I have shown how my invention may be
conveniently carried into practice.
Figure 1 shows a valve partly in central section constructed according to my
invention.
'
Figure 2 is another view of the valve also partly in section.
Figure 3 is a detail hereinafter described, and
Figure 4 illustrates in central section a modified form of my improved valve,
Like letters represent corresponding parts throughout the drawings.
The outlet valve represented in Figures 1 and 2 has for its object the discharge
of liquid carbonic acid. It is attached to the receptacle or reservoir of such gas by
means of the screwed nozzle x.
a is a three-way cock by operating which the passage to the valve is opened or
closed. The tap or cock a also provides an inlet for the air. The arrangement of
this tap does not require further comment.
passage
Referring to Figure 1, the carbonic acid can pass through the
b into a
chamber c, and from thence through a passage d into a receptacle e, from which
the carbonic acid is conducted away by means of an outlet f Figure 2.
such valve being
The regulation of the pressure is effected by means of a valve 99
movable in the chamber c and provided with a spring which operates to con-
tinuously press the valve towards its seat in the end of the chamber c in which is
situated the opening d. The valve is however prevented from closing the
aperture d, except as hereinafter described, by means of a pin k' which protrudes
through the said aperture d.
C
The valve g has free play in the chamber and the carbonic acid can pass either
in front or behind the same.
The pin moves simultaneously with a piston k, which takes the pressure of the
carbonic acid drawn off. This pressure tends to force the piston back against the
pressure of a spring o, such spring acting through the head n of a screw 'm carried
by the piston k.
Should the pressure rise sufficiently to force back the piston k and with it the
pin the spring would then press the valve g against its seat. The flat spring o
against which the piston k, with the sorew m is pressed, opposes the pressure of the
carbonic acid. In order to force back the piston k the carbonic acid must overcome
a pressure equal to the difference between the pressure of the spring o and that of
the spring h. The arrangement of the spring his not absolutely necessary but is a
convenient plan possessing the advantage of allowing the valve to move freely
while the parts are easily put together. The piston k is movable within a cylinder i
which is air tight within the case e but can be turned within the same. Rotary
movement is imparted to the said cylinder by means of a hand wheel L operating
through a shaft and worm A (Figure 3) which said worm gears with a worm
wheel' fixed on or formed with the cylinder i. By operating the hand wheel L
which
the gear is set in motion. Then the cylinder i revolves and a screws,
through the latter compels also the piston k to turn with the cylinder. The
passes

page_text: screws projects into a slot t, in such a manner that longitudinal play of the piston
is not prevented.
When the piston revolves the screw m turns in or out of the same its square
head n being able to slide through a plate g, but not able to revolve.
If the hand wheel L is turned so that the screw m, works itself out of the
piston k, the latter makes a forward movement and presses the valve g, further
back from its seat, and compresses the spring. The consequence is that the
valve a, cannot now so easily reach its seat, as before it can do so the spring o, must
be more strongly bent or forced further back than before by the pressure of the
carbonic acid. The carbonic acid is emitted therefore with a greater pressure.
Should the handwheel L be turned in the opposite direction, the screw. m will be
screwed further into the piston k. The valve g is thus brought nearer its seat and
the carbonic acid is emitted with less pressure.
e
The chamber and the casing e, must be made quite tight so as not to allow any
евсаре of gas.
This valve can be used also for emitting other liquids or gases under presstire
and allowing the same to pass at a fixed pressure. The advantage of such a valve
consists in its adaptability to emit liquids or gases under pressure at any fixed
pressure.
Figure 4-shows an outlet valve which also serves the purpose of an inlet for the
carbonic acid, i.e. it is adapted for filling bottles or other receptacles. When used
as an inlet valve the carbonic acid goes then in the opposite direction. In con-
sequence of the pressure which however acts upon the piston the valve g would
be closed. In order to prevent this, a pressing disc y is placed over the elastic
spring disc o, and so arranged that it can be pressed against the said disc O by
means of a screw y'. When this takes place, the valve g is thereby opened the
piston k being pressed against the valve rod g of the said valve. The elastic disco
has now however a bearing against the pressing disc y and cannot therefore spring
back under the force of the pressure. Thus the valve when used in this manner
does not regulate the pressure.
As soon as the pressing diso y is sorewed back again the valve can once more be
used as a pressure regulator.
A further modification of the arrangement shown in Figure 1 consists in amitting
the tap or cock a, the outlet valve not being placed directly over the receptacle or
réservoir containing the liquid or gas to be delivered but at a distance therefrom as
for instance in the case of cupboard apparatus for serving beer the valve may be
placed either on the buffet or on the beer barrel.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
First. A valve with pressure-regulator for liquids or gases under pressure, in
which the pressure of a spring o against a piston (*) causes the pressure-
regulating play of a valve g which is placed outside the cylinder and bears against.
à pin connected to the piston k, such valve being loaded by means of a spring
acting in the reverse direction to the spring and having means for regulating the
distance of the valve g from the spring o, substantially as set forth and for the
purpose specified.
Second. In combination with the valve (described in Claim 1), the pressing diso
arranged above the spring plate o (Figure 4) which, when screwed forward,
prevents the play of the spring plate, thus enabling the valve to be used for the
purpose of admitting liquids or gases, all substantially as described and illustrated.
Dated this 15th day of July 1891.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.