Year: 1887

page_text: We FRANZ HEINRICH JOSTEN, FERDINAND GUSTAV BERNDT and FRIEDRICH
WESTIP all of Uerdingen am. Rhein in the Kingdom of Prussia, German Empire
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:—
The stop cocks or valves heretofore employed for stopping or regulating the flow of
steam or water or other fluids or liquids are liable to become leaky after being in use
for a short time and require regrinding or fitting. This is due to the circumstances
that the steam for example presses in between the plug or valve and its case, or that
the valve or plug sticks or jams in its bearings or that the valve or plug is pressed by
the spindle more to one side than to the other causing it to wear unequally. When
an ordinary plug valve sticks in its bearings and it is necessary to open the spindle
packing in order to make the spindle work easily the steam or other fluid blows or
escapes through the opening. In order to obviate all these disadvantages we employ
a stop cock constructed and operating as hereinafter described.
This stop cock is so arranged that the plug is entirely free and independent and can
yield to the pressure to which it is exposed without being impeded by the spindle.
Moreover the stop cock is also so arranged that the steam or fluid enters the hollow
conical plug from one end or from above and escapes through lateral openings therein
whereby the plug is pressed against its seat and leakage is prevented. In addition to
this the spindle is so arranged that no leakage can take place around it.
And in order that the said Invention may be fully understood we shall now proceed
more particularly to describe the same and for that purpose shall refer to the several
figures on the annexed sheet of Drawings the same letters of reference indicating
corresponding parts in all the figures.
Figure 1 of the accompanying drawings represents a longitudinal section of a stop
cock according to our invention. Figure 2 is a transverse section of the same and
Figure 3 is a plan with the upper part removed.
The fluid enters at a and is delivered at b. The plug c is hollow and open at the
top (see plan figure 3) and is provided with two diametrically opposite openings or

page_text: orifices d which correspond with similar orifices or ports e in the seating. The ports e
are arranged at right angles with the inlet orifice a and outlet orifice .
The plug and its sockets are made taper or conical and the former is preferably
made of brass or red metal, and the latter of cast steel being accurately ground
together. The inlet orifice.a and the outlet orifice b communicate with the plug in
such a manner that the incoming steam or fluid enters the hollow plug c from above
and by the pressure which it exerts upon the bottom maintains the said plug fluid
tight in its seating. When the stop cock is open the fluid entering at a passes through
the hollow plug c, orifices d ports e and through lateral passages or chambers
outlet b as indicated by the arrows.
g
to the
In order that the plug c and its spindle or handle h may be held fluid tight to
their bearings without constraining the spindle in its stuffing box i the following
arrangement is employed. The spindle or handle h by which the stop cock is
worked is not rigidly connected with the plug c but is simply provided with a
key in the form of a square or angular socket which engages with a square or
correspondingly angular stem k formed on the said plug. A helical spring n
placed in a deep recess in the key bears against the extremity of the stem k and
tends to force the key upwards thus maintaining a shoulder on the spindle pressed
fluid tight against a packing ring o and preventing any escape of steam or other
fluids or gases through the stuffing box i. The latter is consequently of merely
secondary importance and does not require to be so tightly packed as in the case of
ordinary stop cocks. The plug is pressed into its socket or seating partly by the
action of the steam and partly by the action of the spring n and leakage at this point
that is to say around the plug is thus effectually prevented.
By means of this arrangement the plug is enabled to be very easily rotated and is
never liable to stick being located wholly and completely within the case. To close
or open this stop cock it is simply necessary to move the plug through an angle of
ninety degrees.
Having now particularly described and ascertained the nature of our said Invention
and in what manner the same is to be performed we declare that what we claim is :—
A stop cock wherein the plug is open at the top or one end and is provided with
lateral orifices (d) which are capable of coinciding with corresponding ports (e) in such
a manner that the fluid or steam can flowing through the cock enters the plug from
one end or above and wherein the spindle or handle (h) for operating the plug is
loosely connected with the plug by means of an angular key (1) and a shoulder on the
said spindle is pressed against a packing ring (o) on the case or body of the cock by
means of a spring (n) all substantially as hereinbefore described and illustrated in the
accompanying drawings.
Dated this 12th day of May 1887.