An Improved Tap, Cock, or Valve, Applicable for use with Water, Steam, Gas, Air, or other Fluid.
Year: 1890

page_text: Date of Application, 3rd Mar., 1890-Accepted, 12th Apr., 1890
COMPLETE SPECIFICATION.
An Improved Tap, Cock, or Valve, Applicable for use with Water,
Steam, Gas, Air, or other Fluid.
1, ALFRED HENRY BARTON, of 36, Radcliffe Road, Northam, Southampton,
Hampshire, Mechanical Engineer, 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 :-
This invention has for its object the construction of an improved tap, cock or valve,
which is designed mainly with a view to render unnecessary shutting off the supply
of the water, steam, gas, air or other fluid from either the main, or the cistern or
receiver, supplying the tap, cock or valve, during the carrying out of necessary
repairs. The tap, cock or valve is also designed to prevent waste, if the thread strips,
by the automatic action of the lower valve.
In order that my invention may be thoroughly understood I have appended the
accompanying drawing, which represents the said construction of tap, cock or valve
in section.
According to my invention I cast in the body A of the tap or cock a bridge
piece B, such as usually obtains in this type of tap or cock. The bridge piece B is
provided with the ordinary circular aperture C to allow of the passage of the water,
steam, gas, air or other fluid. A valve D. is screwed down on to the upper face of the
bridge piece B, when it is desired to stop the flow or passage of the water or the like
through the mouth of the tap or cock. The lower end of the spindle of the valve D is
screwed and engages with a corresponding screw cut in the upper portion A' of the
body of the tap or cock. A part A² of the upper portion of the body of the tip or
cock preferably so cast as to act as a stop to limit the upward movement of the
valve D. I provide below the bridge piece B a valve E which moves in a guide F in
the lower part A³ of the body of the tap or cock. The spindle of the upper valve D
is prolonged and the extension D¹ rests upon the centre of the upper face of the lower
valve E. The upper face of the valve E is provided with three or more projections or
guide pieces G, which move in the aperture C of the bridge piece B. Two of these
projections are shown in the annexed drawing. The valve E might be of a wing, ball
or cone form. The valve E is urged or pressed upwards by means of a spiral
spring H. The valve E is thus always tending to stop the passage of the water or
the like through the mouth of the tap or cock, but is prevented therefrom by the
extension D¹ of the spindle of the valve D resting upon its upper face..
The method of using the tap or cock is as follows:-
If it is desired that no water or the like shall pass through the mouth of the tap or
cock the valve D is screwed down on to the upper face of the bridge piece, as shown
in the accompanying drawing. Directly the valve D is moved from the upper face of
the bridge piece the water or the like will pass between the projections or guide
pieces G and through the mouth of the tap or cock. The lower valve E auto-
matically follows the upward movement of the valve D, owing to the combined action
of the spring H and the pressure of the water or the like, and the passage of the latter
will continue until the valve E comes against the lower face of the bridge piece. The
valve E thus automatically stops the passage of the water or the like, and the upper
part of the tap or cock can then be removed for repairs. The valve E might, if
desired, also be used to stop the flow or passage of the water or the like when the tap
or cock is in use.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is.
The improved tap, cock or valve, consisting of the valve D screwed down on to the
upper face of the bridge piece B and governing the upward movement of the valve E
which automatically presses against the lower face of the bridge piece B and closes
the passage through the tap or cock by the combined action of a spring and the
pressure of the water, steam, gas, air or other fluid, substantially as described herein
and illustrated by the accompanying drawing.
Dated this 25th day of February 1890.
JAMES STEVENSON,
Gray's Inn Chambers, 20, High Holborn, London, W.C., Agent for Applicant.