IMPROVEMENTS IN SELF-CLOSING VALVES
Year: 1884

page_text: JAMES NEVILLE SPERRYN 6 Park View Kidderminster Road Croydon in the
County of Surrey, Gentleman. I do hereby declare the nature of my Invention.
for IMPROVEMENTS IN SELF-CLOSING VALVES 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 push cocks or valves for controlling the supply of
liquids or fluids and it has for its object to provide a non-concussive cock closing
automatically with the pressure and, cut off the supply immediately the spindle is
released thereby preventing waste, an essential feature consisting in establishing
an equilibrium or partial equilibrium of the liquid itself within the cock, the fluid
acting upon and governing the spindle, the water in the upper chamber acting as
a counterpoise and enabling the spindle when closing upon its seat to do so
silently.
DESCRIPTION OF DRAWINGS,
Figure. 1. The body may be of any suitable form and having the inlet A and
outlet B in any convenient position relatively to the valve Cand valve seat D
according to the purpose for which the cock or valve is intended. The barrel is
bored cylindrically and the lower part preferably of a larger diar., a seat is
formed in the barrel at the junction of the upper E with the lower chamber F. A
stem or spindle G with a water way through it for a certain distance and finding
an exit at J carrying a pair of cupped leather plungers or pistons which are secured
to the spindle a certain distance apart one above and the other below the seat and
below the outlet and move up and down therewith within the barrel of the cock,
the plungers being so arranged and the barrel so constructed that when the spindle
is pushed in to open the supply a free passage will be given to the fluid, which
acting upon the plungers will close the supply immediately the spindle is released,
both plungers are so urranged that the fluid will expand them and ensure a tight
closure and under any pressure preventing waste and leakage the spindle G may
be solid and without a water way, the fluid may pass through K or any other
route to the top chamber, or the fluid may pass through the spindle G and
passage K both combined, in the event of a very low pressure of water a spiral
spring L may be added for the purpose of assisting the spindle to rise.
Figure 2 is shewn with a space between the upper and lower chamber.

page_text: Figure 3 is shewn with a solid bottom, in all other respects the working parts
correspond with Figure 2.
Figure 4 is a horizontal cock upon the same principle with respect to the
working parts.
.
The plungers or pistons may be made of india rubber, vegetable fibre or any
suitable material.
Having described the nature of my Invention and the manner of performing
the same I declare that what I claim as my Invention to be protected is;- ་
A spindle free to move up and down in the barrel of the cock passing through
the seat and controlled by the pressure of the fluid.
A cock made with a chamber or chambers to suit a double piston spindle.
Carrying the fluid into the upper chamber and thence downwards through the
seat and over the face of the valve.
Lastly. The combination of these parts for the purpose substantially as set
forth in this Specification.
Dated this First day of April 1884