IMPROVEMENTS IN COCKS OR VALVES
Year: 1885

page_text: I ALFRED GEORGE BROOKES of the firm of Wm Brookes & Son of 55
& 56 Chancery Lane in the County of Middlesex Fellow of the Institute of
Patent Agents do hereby declare the nature of my invention for IMPROVEMENTS
IN COCKS OR VALVES, to be as follows:-
The invention relates to improvements in cocks or valves and more especially to
that kind of cocks which are usually called bib-cocks and the object of the
improvements is to prevent the liquid from escaping through the opening, through
which the valve-rod passes, without using any stuffing-box.
To attain these objects I make use of an oval or allied form of ball of elastic
material which is pressed upon the valve seat by a screw or lever when the cock is
closed. The valve seat is placed somewhat below that place of the cock casing
where the bib channel begius but above the inlet opening for the liquid. The rod
by which the pressure is exerted upon the ball passes through the conical cavity of
the casing above the valve seat and above the bib channel and goes through an
opening in the cock shell without any special means for securing tightness.
The width of the said conical cavity of the casing corresponds at its lower end
with the shortest diameter of the oval ball and decreases toward the upper end.
When the pressure is released from the top of the ball by unscrewing the locking
screw or its equivalent or by lifting the hand lever the liquid entering through the
inlet opening raises the ball and presses it into the conical cavity thus barring the
opening wherethrough the valve rod passes, against the escape of liquid through
the same.
Simultaneously the raising of the ball opens the channel for the outlet
of the liquid flowing through the valve seat.

page_text: 及
I ALFRED GEORGE BROOKES of the firm of Wm Brookes & Son of 55
& 56 Chancery Lane in the County of Middlesex, Fellow of the Institute of
Patent Agents do hereby declare the nature of my invention for IMPROVEMENTS
IN COCKS OR VALVES and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:—
The invention relates to improvements in cocks or valves and more especially
to that kind of cocks which are usually called bib-cocks and the object of the
improvements is to prevent the liquid from escaping through the opening, through
which the valve-rod passes, without using any stuffing box.
To attain these objects I make use of an oval or allied form of ball of elastic
material which is pressed upon the valve seat by a screw or lever when the cock. is
closed. The valve seat is placed somewhat below that place of the cock-casing
where the bib channel begins but above the inlet opening for the liquid. The rod
by which the pressure is exerted upon the ball passes through the conical cavity
of the casing above the valve seat and above the bib channel and goes through an
opening in the cock shell without any special means for securing tightness.
The width of the said conical cavity of the casing corresponds at its lower end
with the shortest diameter of the oval ball and decreases toward the upper end.
When the pressure is released from the top of the ball by unscrewing the
locking screw or its equivalent or by lifting the hand lever the liquid entering
through the inlet opening raises the ball and presses it into the conical cavity thus
barring the opening wherethrough the valve rod passes, against the escape of liquid
through the same.
Simultaneously the raising of the ball opens the channel for the outlet of the
liquid flowing through the valve seat.
In the accompanying drawing figure 1 is a vertical section of a bib cock
constructed according to my invention the cock being shown in the closed position;
and fig. 2 is a top view of cover plate with the valve rod in section. Figure 3 is a
vertical section of the same cock in the opened position.
a is the oval ball; b is the valve rod and c the cover of the cock casing B, the
rod being provided with a screw-thread to fit into a female thread provided in the
cover. d is the conical chamber in the upper part of the cock casing, into which
the ball a is pressed by the pressure of the water, as soon as the rod b has been
lifted.
e is the seat of the ball, when pressed down by the valve rod, ƒ is the
inlet and g the outlet of the water towards the bib. Holes are provided in the
cover c to prevent any compression of air, when the ball a is raised by the pressure
of the water.

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
In cocks or valves the combination of the ball a of oval or allied form with the
valve rod b and the conical chamber d, substantially as and for the purpose
specified.