Year: 1897

page_text: I, CHARLES WILLAN COCKBURN, of 17, Blenheim Crescent, Notting Hill, in the
County of London, Book-keeper, do hereby declare the nature of this invention
to be as follows:-
My invention relates to an improved tap or valve which may be advantageously
employed for controlling the flow of water and other liquids.
To ensure fluid-tightness of the tap for a longer period than is practicable with
the ordinary narrow-seated screw-down valves or taps, I make my improved tap
with a long conical seat, and with a conical plug of about the same length, which
is adapted to fit into the said seat and is moved into and out of the same by suitable
devices hereinafter mentioned, without rotating it, a conical ring or washer of
leather, india-rubber or other suitable material being arranged between and
secured to one or other of the conical metal surfaces, so that but little force is
required to tightly close the tap.
In carrying my said invention into practice, I sometimes form or mount the said
conical plug on a square, hexagonal or other stem adapted to slide, without turn-
ing, in a correspondingly-shaped guide in the casing, or I otherwise so arrange
the said stem as to prevent rotation thereof, and I provide either on or in the other
end of the said stem, a screw-thread adapted to engage with a nut or with a screw-
threaded spindle formed in or on a rotary cap or cover, which is secured upon the
end of the casing so that it can be turned about its axis but is restrained from end-
wise movement.
To permit of the said cap or cover working fluid-tight on the end of the casing,
I sometimes provide suitable packing between a flange on the said casing and the
said rotary cap or cover, or a flanged ring secured thereto by screws or other suit-
able means.
The said cap or cover is made with a milled edge, or with arms or
the like whereby it may be readily turned.
The improved means above described for moving the conical plug into and out
of its conical seat, can also be used for moving an ordinary mushroom-valve to
and from a flat seat.
In some instances, instead of the arrangement above mentioned, I attach the
aforesaid conical plug to a rotary screw-threaded spindle working in a tapped hole
in the casing, in such a manner that, as soon as the said plug comes in contact
with its seat, it will cease to rotate during the further rotation of the spindle to
force it into its seat.
I can, if desired, so attach the said conical plug to its stem or spindle that it will
rotate therewith; it is, however, more advantageous to force it into and draw it
out of its conical seat without rotating it.

page_text: The said conical seat is preferably formed in the inlet of the tap;
it
may,
how-
ever, be formed in the outlet thereof if desired.
Dated the 13th day of December 1897.
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant..
I, CHARLES WILLAN COCKBURN, of 17, Blenheim Crescent, Notting Hill, in the
County of London, Book-keeper, do hereby declare the nature of this invention
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 an improved tap or valve which may be advantageously
employed for controlling the flow of water and other liquids.
To increase the durability of the valve or tap and ensure its effecting a fluid-tight
closure for a longer period than is practicable with the ordinary narrow-seated
screw-down valves or taps, I make my improved tap with a long conical seat, and
with a conical plug of about the same length which is adapted to fit into the said
seat and is moved into and out of the same by suitable devices, such as are herein-
after described, without rotating it while in contact with its seat, a conical ring
or washer of leather, india-rubber or other suitable material being arranged
between and secured to one or other of the conical metal surfaces, so that but little
force is required to tightly close the tap.
In the accompanying drawing I have shown how my said invention may be con-
veniently and advantageously carried into practice.
Figure 1 is a longitudinal central section, and
Figure 2 a transverse section on the liner, c, Figure 1, showing one form of
my improved tap.
Figure 3 is a similar view to Figure 1 showing another form or modification of
my improved tap.
Like letters indicate corresponding parts throughout the drawing.
A is the shell or casing of the tap or valve, which is provided with the usual
inlet A and delivery nozzle A².
The said casing is provided internally with a long conical seat B. A conical
plug or valve C, of similar pitch to the seat B, is adapted to engage therewith,
and is provided with a circumferential groove or recess C¹ to receive a conical
packing-ring or washer D, which, when pressed against the seat B, will form a
Huid-tight joint. The said packing-ring or washer may consist of leather, india-
rubber, ebonite, vulcanized fibre or other suitable material.
In the arrangement shown in Figures 1 and 2, the plug C is made with a
cylindrical stem C2 having a flattened surface C so that it can slide to and fro, with-
out turning, in the casing A, which is formed with a corresponding flat surface A³.
The said plug C is provided with a tapped hole C+ into which is inserted a screw-
spindle E extending through a cap or cover F screwed upon one end of the casing A.
This spindle is provided with a hand-wheel E' and with a collar E2 working in a
recess in the cap F, in which it is held by a screw-plug F¹ so as to take the end
thrust of the spindle E. Therefore, by rotating the spindle E in one or the other
direction, the plug C can be moved longitudinally into or out of contact with its
seat B, and the valve or tap thus opened or closed.

page_text: A' is a passage through which the space behind the plug C is put in communica-
tion with the delivery passage A2, to carry off any water that may enter the said
-space.
I sometimes make the stem C3 of the plug C of square, hexagonal or other suit-
able cross-section, so as to prevent it from rotating in the casing A, part of which
is made of corresponding shape to serve as a guide.
In the arrangement shown in Figure 3, the conical plug C is suitably attached
to a rotary screw-spindle E working in a tapped hole F2 formed in a cap F screwed
upon one end of the casing A, in such a manner that, as soon as the said plug comes
in contact with its seat, the friction between the parts will prevent rotation of the
plug C during the further rotation of the spindle to force the said plug into its
seat. In this arrangement, the packing-ring D is secured to the surface of the
plug C by means of a removable disc and screw B².
My improved tap is not so liable as the narrow-seated screw-down taps or valves
hitherto employed, to be prevented from properly closing by grit coming between
the valve and its seat, as the long conical packing-ring, being of comparatively
yielding material, can be easily forced into fluid-tight contact with the valve-seat
notwithstanding the presence of grit, and is not liable to be thereby damaged so
as to cause leakage. The tap will, therefore retain its capability of closing in a
fluid-tight manner for a longer period than the screw-down valves or taps hereto-
fore constructed.
I can, if desired, secure the conical packing-ring D in the seat B instead of
on the plug C.
It is obvious that other suitable means can be employed for effecting the longi-
tudinal movement of the plug or valve C. For instance it can be provided at its
rear end with a screw-threaded extension adapted to engage with a nut formed in
or on a rotary cap or cover rotatably mounted on the end of the casing but pre-
vented from endwise movement, suitable means being provided for preventing
escape of water at the joint between the said cap or cover and the casing.
I can, if desired, so attach the said conical plug to its stem or spindle that it will
rotate therewith; it is, however, more advantageous to force it into and draw it
out of its conical seat without rotating it.
The said conical seat is preferably formed in the inlet of the tap; it may, how-
ever, be formed in the outlet thereof if desired.
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. A tap or valve constructed with a long conical plug adapted to be moved
longitudinally into and out of a corresponding seat, between which and the said
plug there is a conical ring or washer of leather, india-rubber or like material,
substantially as herein before described.
2. The improved tap or valve constructed, arranged and operating as above
described with reference to Figures 1 and 2, or to Figure 3 of the accompanying
drawing.
Dated the 13th dow of MAN
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.