Improvements in Valves and Cocks.
Year: 1898

page_text: Date of Application, 2nd Feb., 1898-Accepted, 26th Mar.,
1898
Improvements in Valves and Cocks.
I, PAUL SCHOU, of 22, Walbrook, in the, City of London and County of Middlesex,
Engineer, do hereby declare the nature of this invention which has
been communicated to me by Heinrich Kamp, of Cape Town, and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement:―
This invention relates to valves and cocks and it consists essentially in the com-
bination with a screw down valve of an automatic ball valve, the object being to
enable repairs to be made to the screw down valve without either cutting off the
supply, or allowing an escape of the fluid.
In the accompanying drawing which illustrates this invention;
Figure 1 is a view in longitudinal section, and
Figures 2 and 3 are broken views in transverse section, the former showing the
valve or cock open, and the latter showing it closed by the screw down valve.
Throughout the views similar parts are marked with like letters of reference.
According to this invention, the case A of the valve is provided with an ordinary
seating a for the screw down valve B to bed against the underside of the said seating
being shaped to form a seat a¹ for a ball C of rubber or other suitable flexible
material. To provide for the introduction of the said ball, a cap D is threaded into the
case A, the said cap being hollowed out to form a chamber d for the ball to rest in
when the valve B is screwed down on to its seating a.
The outlet a² of the case A
may be either shaped for a draw off valve as shown by Figure 1, or as a connecting
stop cock as shown by dotted lines in Figure 1.
The screw down valve consists of a plate b carrying a washer 6' of any suitable
material and a projecting plug 62 which is adapted to come into contact with the
flexible ball C and is preferably provided on its lower face with a recess to engage the
said ball. The plate b preferably connected to the screw stem E adapted to
operate the valve by means of a stem 63 engaging with a recess in the base of the
stem E so that it is not rotated by the said stem, but this construction is not
obligatory.
The other parts of the valve or cock to which no reference has been made present
no novel features and may be of the usual type.
It will be seen that when the valve B is lifted from its seating by the pressure of
water beneath it when the stem E is screwed upwards the flexible ball C will be forced
against the seating a¹ by reason of the pressure of fluid behind it and thus auto-
matically closes the valve.
To open the valve or cock the stem E is screwed down which causes the projecting
plug b² to engage with the ball C and force it from its seating a¹ which allows the
fluid to pass by as shown by arrows in Figure 2. To permanently close the valve or
cock, the valve B is screwed down on to its seating a as shown by Figure 3, when
the ball C is forced down into the chamber d in the cap D by the pressure of the
fluid.

page_text: 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 is :-
I
(1) The improvements in valves or cocks, substantially as herein, specified and
illustrated by the accompanying drawing.
(2) In a valve or cock the combination of a screw down valve and an automatic ball
valve as and for the purpose specified.
(3) The combination with a screw-down valve or cock, of an automatic ball valve,
the construction being such that when the screw-down valve is bedded on its seating
it forces the ball valve out of engagement with its seating, when it is a little way
clear of its seating it engages the ball and prevents it seating itself
on its seating and thereby closing the valve, and when it is further lifted
from its seating it allows the ball valve to operate, as and for the purpose set
forth.
2000
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.