Cut-off Cock or Valve with Separate Closing Device.
Year: 1899

page_text: Date of Application, 12th June, 1899-Accepted, 13th Jan., 1900
COMPLETE SPECIFICATION.
Cut-off Cock or Valve with Separate Closing Device.
We, WILHELM SCHLÖSSER, trading as Kammgarn Spinnerei Eitorf, KARL
SCHÄFER AND COMPANY, and HERMANN MOERES, Electrical Engineer, both of Eitorf
on the Sieg (Rhine Province) 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:-
As is well-known, it is a very great drawback that especially in the case of
service water cocks or valves a leakage of the packing or of the plug or valve piece,
or even the carrying out of repairs, necessitates the shutting off of the entire main
service which leads to many inconveniences, especially in large households. Now
the present invention has for its object to remove these drawbacks by means of
the arrangement between the service pipe and the water cock or valve, of a fur-
ther and separate closing device, which in such cases can be operated by a simple
manipulation, and thus prevents the further flow of water, and in which case
the pressure existing in the water pipe itself effects a good and tight closure by
means of the closing part.
According to this invention the object is not the provision of an additional
cock plug or the like, but the invention consists in providing a device which
can be applied in a very unnoticeable manner, and without appreciable increase of
the total cost to every hydrant or water valve, and even to steam or gas cut-off
valves and cocks. The means employed for effecting this purpose are extremely
simple, and consists as shown in one construction by way of example in Figures 1
to 4 of the annexed drawings, in various sections and in elevation, first of a tubular
piece a, which is fixed by means of a screw thread to the closing part, in the present
case to a service water cock H, in the interior of which there is provided a ball
valve c for the purpose of closing temporarily the aperture 6 of the pipe. This
ball valve c, which is preferably made of rubber, caoutchaouc, vulcanised fibre,
or in the case of steam pipes may be made of metals or other suitable material, is
fixed to a pin d, which is formed at its lower end with a spherical extension .
This extension engages in a corresponding hemispherical recess in a vertically
movable spindle e in such a manner that the balle can within certain limits move
freely in all directions, and can rotate in a circle. The pin d and the ball e are
however prevented from falling out of the mounting in the spindle e, by means of
a cap f, which is slipped over the upper end of the spindle e, and the spherical
extension d', and which also limits exactly the rotary motion of the ball. On
the tubular piece a there is provided at the lower part a tubular portion a¹ over
which there is slipped a nut with a locknut, which serve in this manner partly to
guide the spindle e in a straight line, and partly by means of an inserted packing
to produce a tight joint against the periphery of the spindle e. If the packing in
the tubular part should become defective then the ball e in this case also forms a
closure by bearing upon the hole in the stuffing box seat, and thus prevents the
pressure fluid from passing out along the spindle e. Normally, that is to say
when it is not necessary to shut off the cock H for the purpose of effecting repairs,

page_text: the balle is situated in the lower part of the tubular part a, as indicated in Figure 1
in which position the pressure fluid surrounds the ball on all sides, so that the
several pressures upon the same balance one another mutually. If however the
cock H has to be screwed out, the spindle e is pressed up with the thumb (after
the cock has been opened a short time before) to about the extent shown in
Figure 3. In this position the valve piece e is situated just in front of the outflow
passage b, and the water flowing through the pipe consequently exerts a pressure
upon the ball c, which is not balanced by any other oppositely directed pressure in
front of the aperture 6. Consequently the rod d swings in obedience to the pres
sure towards the left hand, and the ball e bears against the aperture b which forms
a valve seat with its edges, so as to produce at once a cutting off of the flow of
water by its own pressure. When the repair of the cock H is finished, a slight
downward pressure exerted upon the spindle e is sufficient to throw the shutting
off device out of operation again.
C
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed, we declare that what
we claim is:
,
(1) A device for cutting off the flow of water steam or gas in pipes, which
is to be inserted between the pipe and the closing part (cock or valve) characterised
by the fact that the pressure existing in the pipe is made to press automatically
a valve piece c against the outflow aperture b, and thus render any further How
of the pressure fluid impossible, for the purpose of enabling the closing devices
(cocks or valves) to be removed for the purpose of repair or cleaning without pre-
viously shutting off the pressure fluid contained in the pipe.
(2) A form of construction of the shutting-off device, specified in Claim 1,
characterised by the fact that the shutting-off of the pressure fluid is effected by
means of a valve part c which is connected in a pendulating manner by means
of a ball joint d', d, f, with a spindle e which is capable of movement in a vertical
direction, said valve part e being adapted to bear against the outflow opening b, and
to close the latter by such means, after the spindle e has been shifted and the
shut-off device H has been opened.
Dated
1041
1000
ROBERT E. PHILLIPS, Assoc. M. Inst., C.E., M. I. Mech. E.
Chartered Patent Agent,
70, Chancery Lane, London, W.C., Associate Agent.