An Improved Cock or Valve.
Year: 1899

page_text: Date of Application, 10th June, 1899-Accepted, 15th July, 1899
An Improved Cock or Valve.
I, MICHAEL MARY BROPHY, of the Firm of James Slater & Co., 251, High
Holborn, in the County of London, Engineers, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement;-
-
My invention relates to an improved cock or valve, the valve proper of which
is designed to be opened by an eccentric or cam the rod carrying which has a
brake arranged in connection with it for preventing the rod carrying the said
eccentric, after it has been moved to open the valve, from being again moved
to close the valve under the pressure of the valve against it.
In the accompanying drawing,-
Figure 1 is an elevation partly in longitudinal section of a cock or valve con-
structed according to my invention; and
Figure 2 is a central transverse section of the same.
is the shell or casing of the valve, having the branch for the attachment
of the inlet pipe and the branch c for the attachment of the discharge pipe, and
provided with an opening on the top (closed by a cap ) for the introduction
of the valve into the casing and another opening at the side (closed by the cap e)
for the introduction of the spindle carrying the cam.
f is the partition in the casing between the inlet and discharge ends of the
cock and having the opening g formed in it, and is the valve which is arranged
to close the said opening, the said valve, as shewn, having a packing ring i
located in a recess therein and resting upon a seat introduced into the opening g.
The said valve is also provided with guiding feathers which work through the
aperture and with an upward tubular shank which works upon a guide pin m
on the cap d.
n is a spring which surrounds the stem and serves to constantly tend to press
the valve on to its seat. o is the cam by means of which the valve is raised from
its seat; this cam, as shewn, is formed by a flat surface upon one end of a
spindle which passes through the cap e and has at its outer end a lever q by
means of which the said spindle 2 can be moved to lift the valve, the said lever
having at its lower end a horn r adapted to impinge against a stop s on the
casing a for arresting the movement of the lever when the valve is in its closed
position. The brake which I use in conjunction with this spindle p comprises
a collar having formed in one face a channel for receiving a ring u of suitable
packing material, such as asbestos, which is also in contact with a rib on the
casing of the cock. wo is a spring which surrounds the spindle p and presses
against the collar with sufficient force to press the packing ring u into fric-
tional contact with the rib to produce the required brake action upon the
spindle p.
The said ring also serves as a packing to prevent the escape of
liquid around the spindle p.
With the construction hereinbefore described it will be obvious that the move-
ment of the lever q in the direction of the arrow Figure 1 will cause the cam o
to come into contact with the bottom of the portion of the valve and lift the

page_text: said valve to allow the fluid to flow through the opening g, the pressure of the
fluid upon the valve, and which tends to press the valve on to its seat and so
move back the cam to its original position, being counteracted by the friction
between the ring u and the rib v.
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
1. A cock or valve the valve proper of which is held upon its seat by a spring
and designed to be lifted by means of a cam or eccentric upon an operating
spindle, the said spindle having combined with it a brake for checking the move-
ment of the said spindle under the pressure of the spring and of the fluid acting
upon the valve proper, substantially as described.
2. The manufacture and use of cocks or valves, substantially as hereinbefore
described and illustrated in the accompanying drawing.
Dated this 9th day of June 1899.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.