Improvements in Taps or Stopcocks.
Year: 1894

page_text: Date of Application, 26th Apr., 1894
Complete Specification Left, 22nd Jan.; 1895-Accepted, 23rd Feb., 1895
PROVISIONAL SPECIFICATION.
Improvements in Taps or Stopcocks.
We, JOHN SHANKS, Junior, of Tubal Works, Barrhead, in the County of
Renfrew, North Britain, Sanitary Engineer, and ROBERT BURNSIDE, of the same
place, Brass Finisher, do hereby declare the nature of this invention to be as
follows, that is to say :-
Our said invention has for its object to simplify and improve the construction of
taps or stopcocks, to dispense with springs, and with washers or diaphragms of
rubber or other flexible material, and, to insure equal wearing of the contact
surfaces of the valve piece and its seat.
In carrying out our invention we have a disk-shaped or annular valve piece
arranged to close with the pressure upon an aunular seat, and fixed on a spindle
which opens and closes it with a screwing motion. A screw thread on the spindle
works in an internal screw thread in a small block which is fitted loosely but so
that it cannot turn in the body of the tap. The internally screwed block can move
to a limited extent in the direction in which the valve piece opens and closes, in
consequence of which arrangement the valve piece has to be turned with its
bearing surface in contact with the valve seat when beginning to open it, if it has
been screwed up tightly, and this contact turning produces equal wear.
There is
also similar contact turning after the valve is closed if the screwing is continued
until tightness is attained.
Dated this Twenty-fourth day of April 1894.
EDMUND HUNT,
Applicants' Agent.
Improvements in Taps or Stopcocks.
We, JOHN SHANKS, Junior, of Tubal Works, Barrhead, in the County of
Renfrew, North Britain, Sanitary Engineer, and ROBERT BURNSIDE, of the same
place, Brass Finisher, 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, that is to say :-
Our said invention has for its object to simplify and improve the construction
of taps or stopcocks, to dispense with springs, and with washers, or diaphragms of
rubber or other flexible material and to insure equal wearing of the contact surfaces
of the valve piece and its seat.
In carrying out our invention we have a disk-shaped or annular valve piece
arranged to close with the pressure and formed or fixed on a spindle. A screw
thread on the spindle works in an internal screw thread in a small block which is
fitted loosely but so that it cannot turn in the body of the tap though it can
move to a limited extent in the direction in which the valve piece opens and closes.
And in order that our said invention and the manner of performing the same may
be properly understood we hereunto append a sheet of explanatory drawings to be
hereinafter referred to and showing our improvements.c

page_text: Figure, 1, on the sheet of drawings is a side elevation, and Figure, 2, a vertical
section of our improved tap.
As shown in the drawings we have a disk-shaped or annular valve piece, A,
arranged to close with the pressure up against an annular seat, B, formed in the
body of the tap. The valve piece, A, is formed in a piece with (or it might be
fixed on) a spindle, C, which opens and closes the valve piece with a screwing
motion, the head of the spindle, C, being square and entered into a square socket
in a piece to which a handle, D, is fixed. A screw thread, E, formed on the lower
end of the spindle, C, works in an internal screw thread in a small square block, F,
which is fitted loosely in the body of the tap being retained by a screwed cap, G.
The internally screwed block, F, and its socket being square it cannot turn but it
can move to an extent limited by a flange, H, towards and from the valve seat, B,
in consequence of which arrangement the valve piece has to be turned with its
bearing surface in contact with the valve seat, B, when beginning to open it, if it
has been screwed up tightly, and this contact turning produces equal wear. There
is also similar contact turning after the valve piece, A, is closed if the screwing is
continued until tightness is attained.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what
we claim is:-
The improved tap or stopcock the valve piece of which closes with the pressure
and has formed on its spindle a screw thread working in an internally screwed
non-turning block which has a limited movement towards and from the valve
seat, the parts being combined and operating substantially as hereinbefore
described.
Dated this Twenty-first day of January 1895.
EDMUND HUNT,
Applicants' Agent.