Improvements in Push Water Cocks.
Year: 1895

page_text: Date of Application, 1st Oct., 1895
Complete Specification Left, 28th May, 1896-Accepted, 4th July, 1896
TCommunicated from abroad by ALFRED ERNEST MARKWICK, of Karachi, in the
Province of Sind, in the Empire of India, Engineer.]
Improvements in Push Water Cocks.
I, HENRY HARINGTON LEIGH, Assoc. M. Inst. C.E., Fel. Ch. Iust. P.A.,
F.I. Inst., practising as Phillips & Leigh of No. 22 Southampton Buildings,
Chancery Lane, in the Administrative County of London, Engineer and Patent
Agent, do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in push water cocks.
In carrying the invention into effect, the ordinary push piece is discarded and
one is adopted that is incorporated with its spindle and by the latter with the
valve. The latter has also a guide spindle which is continued through a suitable
guide in the tail of the cock.
The valve may be leather or rubber faced or may be of solid metal without any
non-metallic facing. Further, any suitable cross section for the valve as well as
for its seating may be adopted.
The closing spring is arranged between the valve and the tail end.
There is or may be a cavity or an air vessel in the top of the cock body which
the valve shuts off, whenever the cock is opened, from the main, opening it to the
nozzle. The water in it thereupon flows out through the nozzle. Air refills the
chamber, the valve closes, and the water rushes into the body of the valve behind
the valve and the air in the air-chamber without shock.
Dated this 1st day of October 1895.
HENRY H. LEIGH, C.P.A.

page_text: 1
It is fully illustrated in the accompanying figures which are to be taken as part
of this specification and read therewith.
Figure 1 is a longitudinal section of a cock made according to the present
invention for use on a high pressure service, shewing it shut.
Figure 2 is an end elevation looking at figure in the direction of the arrows.
Figure 3 is a longitudinal section of the same cock shewing it held open.
Figure 4 is a vertical section taken along the line 4-4 of Figure 1.
Figure 5 is a plan corresponding with Figure 1.
Figure 6 is a longitudinal section of a cock made according to the present
invention for use on a low pressure service, shewing it shut.
Figure 7 is a plan corresponding therewith.
a is the push piece and b, the spindle. Both of these are, it will be observed in
one piece. Heretofore it has been the practice to make them in two pieces, the one
screwed to the other. Such a construction always left the push piece liable to
being unscrewed from the spindle and perhaps lost. It has been proposed to
obviate rotary motion in the push piece by making a flat on the side of its guide a¹
fitting up to a corresponding flat on the side of the push piece, but even then
separation of spindle and push piece was possible, by reason of the water pressure
on the valve and which gradually turned the latter and its spindle with it, they two
being in one piece with each other.
'
c'is the backward continuation of the spindle a and d is its guide through which
it works. Both spindle a, continuation c and the valve are in one piece. This
guide'd is held in the extreme end of the screwed tail e by any suitable means,
e.g., by arms d' and a screw d'. The said guide and arms are in one piece and their
removal is adapted to give free access to the interior of the cock. is the closing
spring. It surrounds the backward continuation c of the valve spindle, and
consequently has the arms d¹ as a base of operation against the back of the
valve gis'the valve seat. There may be inserted between the two, a packing
ring of any suitable material, fixed either to the valve g as shewn or on the
'seating: Other details, such as the cross section of both valve and valve seat, may
be modified as may be required.
i is an air chamber. The object of it is to prevent concussion in the cock and
the service pipe of a high pressure service. It is formed in the upper part of the
body of the cock, and opens into the barrel of the latter through a port . The
latter is as long as the thickness of the valve 9 plus the travel of the latter, the top
segment of the valve projecting up into it. The air chamber prevents concussion
in the following way.. On pressing the push piece a into its guide a' as far as it
will go, the back of the valve g opens a communication between the air chamber i
and the nozzle whereupon the water then in the said chamber flows down the
nozzle. On the push being released, the spring f assists to close the valve g up
to its seat h. At the moment the valve reaches its seat, water from the service
pipe rushes into the air chamber where the rush is cushioned by the volume of air
pocketted therein.
The faculty possessed by the guide and arms of giving access to the interior of
the cock has been already explained. Sufficient access being thereby provided
for, it becomes practicable, as a result of the construction described, to make the
body of the cock in one casting.
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 :-
1. The combination of push piece, guide, valve and valve spindle, as and for the
purpose set forth.
2. The combination of push piece, valve, valve spindle, backward continuation
thereof and guide for the latter, as set forth.
3. The combination of air chamber, port, valve and cock body, as set forth.

page_text: 4. The combination of cock body; push piece, valve, valve spindle and
backward continuation of the latter, all in one piece, and guide for the said
continuation, as set forth.
DL: 69th dow of Max 1896
HENRY H. LEIGH, C.P.A.