IMPROVEMENTS IN STOP-COCкs
Year: 1884

page_text: I, HERBERT JOHN ALLISON, of 52 Chancery Lane, London, in the County of
Middlesex, Patent Agent, do solemnly and sincerely declare that I am in possession
of an Invention for "IMPROVEMENTS IN STOP-COCкs"; and I do hereby declare
the nature of my Invention for " IMPROVEMENTS IN STOP-COCKS," and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :—
Figure 1, is a side elevation of a stop-cock containing my improvements.
Figure 2, a longitudinal section of the same.
Figure 3, a horizontal section of same, showing the plug turned to close the
openings.
Figure 4, a like section with the plug turned to open the passages through the
cock; and,
Figure 5, a side elevation of the skeleton-cage of the turn-plug.
My Invention consists in providing stop-cocks, and other similar appliances, with
turn-plugs having removable and renewable segmental sections, or gibs, that are
adapted to form tight joints with the bore of the casing, or shell, of the cock.
As illustrated in the Drawing, A is the casing, or shell, of the cock, made in
cylindrical form, and provided with lateral branches, a, for receiving the connecting
pipes; the lower end of said casing is permanently closed, and the upper end-
which is made open-is closed by means of a cap, B, that is screwed thereinto;
said cap has a central hole formed therein for the stem of the turn-plug, and is
provided with a stuffing-box, b, for forming a tight joint around said stem.
The turn-plug consists of a skeleton-cage composed of two circular disks, C,
arranged one above the other and connected together by means of vertical bars, c,
so as to form two passages which cross each other at right angles: Extending
upward from the centre of the uppermost one of the disks C, there is a hollow
stem, c', which contains an upper chamber c², a screw-threaded portion c³, and a
lower chamber c', for purposes hereinafter explained.
The stem c¹ passes through the stuffing-box b, and has, on its outer end, a
handle, or lever C, by which the turn-plug is operated. S-gmental gibs D are
loosely fitted into two of the oppositely located passages that are formed between

page_text: the-vertical bars c and have their convex surfaces closely fitted-by grinding or
other means to the bore of the casing A so as to form a tight joint therewith; a
spring E, fixed in the chamber c, exerts its pressure against the top of the
uppermost one of a pair of angle frames F which are arranged in reversed positions
between the gibs D, so as to press the said gibs outward and keep them in close
contact with the bore of the casing A
For the purpose of grinding-in the turn-plug-whenever this operation is
required a screw G is fitted into the threaded portion c³, of the steni, and is so
arranged that it can be screwed down to bear, with any required degree of
pressure, upon the uppermost one of the angle-frames F, and rigidly hold the
gibs D during the operation of grinding; the head of the screw G is contained in
the upper chamber c, and is provided with a slot, or other means, for receiving a
driver, or other tool, for turning said screw when occasion requires.
A screw plug H, inserted in the upper end of the hollow stem c¹, is provided
with a flange h which overlaps on to the eye of the handle C¹ and secures the
latter in place on the stem of the turn-plug.
When preferred the casing A may be made with a coniform body, instead of a
cylindrical one, for receiving the turn-plug, which latter will then be made in a
corresponding form, with segmental gibs D to fit therein; but in such case a single
angle-frame, made in the form of a key-stone, may be employed for wedging
apart the segmental gibs D substantially in the manner herein described.
•
It is manifest that in this form of stop-cock the greatest wear will come upon
the segmental gibs D, which, being removable from the turn-plug, can be readily
renewed at a very slight cost.
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. In a stop-cock, the combination, with a casing A provided with branches a,
of a turn-plug consisting of a skeleton-cage provided with expansible gibs D, one
or more angle-frames F, and spring E, substantially as and for the purpose herein
specified.
2. In a stop-cock, the combination, with a casing A, of a turn-plug consisting of
a skeleton-cage provided with expansible gibs D, mechanism for forcing said gibs
outward, and a set screw G as and for the purpose herein specified.
3. In a stop-cock, the combination, with a turn-plug consisting of a skeleton-cage
provided with a hollow stem substantially as, described, of the expansible gibs D,
one or more angle-frames F, and set screw G, substantially as and for the purpose
specified.
Dated this 6th day of May 1884