or Air under Pressure.
Year: 1885

page_text: or Air under Pressure.
I ALBERT FEIST of 95 Tachbrook Street Pimlico in the County of Middlesex
Mechanical Engineer do hereby declare the nature of the said invention for " AN
IMPROVED SWING JOINT FOR PIPES CONTAINING STEAM WATER OR AIR UNDER
"
PRESSURE 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 universal swing joint and stop valve for
pipes containing steam water or air under high pressure and it consists in the
construction and combination of parts hereafter described.
My improved universal swing joint may or may not be combined with a stop
valve as may be required. The swing joint itself is constituted by two conical
plugs fitted to rotate in corresponding seats in a pair of shells, the axes of the
plugs being at right angles to one another and the stop valve (if one be combined
with the swing joint) is seated in and works through one of the said plugs, the
parts being constructed combined and arranged as hereafter more fully described
and illustrated in the drawings.
Figure 1 represents an elevation of the combined swing joint and stop valve, the
plug and shell in which the stop valve is fitted being represented in section.
Figure 2 represents a plan of the same. Figure 3 shows a half sectional elevation
of the swing joint without the stop valve and having the inlet and outlet at the
smaller ends of the plugs instead of at the larger ends, as in figures 1 and 2.
The same letters of reference indicate similar parts in all the figures.
a, b, are the two conical plugs and c, d are the shells into which they are
ground.
These plugs are tubular and project at one end from their respective shells and
are provided with threaded nipples for connection with the inlet and outlet
pipes fg respectively, the opposite ends of the plugs being closed. Each plug is
provided with lateral thoroughfares h and with an external circumferential groove i,
the shell having a corresponding internal circumferential groove k, the two
grooves i, coinciding and forming an annular thoroughfare about equal in area to
the bore of the tubular plug and communicating there with by the lateral thorough-
fares h before referred to. The annular thoroughfares i, k of the two shells c, d,

page_text: are in communication with each other by a tubular connection the shells being
connected by a screw joint formed by a screw nipple m screwed into threaded
sockets in either part to be united and further secured by bolts. Or the two
shells might be cast in one.
If the nipples e be at the larger ends of the plugs as in figures 1 and 2, their
smaller ends are hexagonal and project from the shells for the purpose of enabling
the plugs to be held by a spanner when screwing up the pipe connections to the
larger ends and the plugs are held in their seats by gland caps n screwing into
the larger ends of the shells and bearing against springs o interposed between
them and washers p which in turn compress packings q between them and
shoulders on the plugs in order to keep the plugs tight in their seat.
ris a stop valve fitted in one of the plugs. It is carried by a screw spindle 8
working through a guide tube t having a stuffing box and gland at its upper end
and a screw thread cut in the lower end of its bore corresponding to the thread
of the spindle s, this guide having an external threaded flange of sufficient diameter
to screw into and close the aperture in the smaller end of the plug at which the
valve is introduced.
This valve closes against a seat u formed by an internal web situated in the
bore of the plug and at the inlet side of the thoroughfares h. Although I have
shown the stop valve spindle as inserted at the small end of the plug and the inlet
connection at the large end, it will be readily seen that the arrangement may be
reversed.
If the nipples e of the plugs are at their smaller ends, as in figure 3, a part of
made of greater
the projecting portion of the plug behind the threaded nipple
diameter and hexagonal or of other suitable form for holding it from turning
when screwing up the pipe connections f, g thereto, and the larger ends of the
shells are closed by screw caps n, and the plugs are held in their seats by springs o
confined between said caps and the larger closed ends of the plugs.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
1st A universal swing joint (for pipes containing steam, water, or air under
pressure) constituted by two tubular conical plugs having their axes at right
angles to one another and fitted in corresponding shells, the plugs and shells having
thoroughfares and the plugs projecting from one end of the shells for attachment
of the inlet and outlet pipes substantially as described and illustrated in the
drawings.
2nd A combined universal swing joint and stop valve (for pipes containing
steam, water, or air under pressure) constituted by two tubular conical plugs
having their axes at right angles to one another and fitted in corresponding
shells, and provided with thoroughfares as described and by a screw down valve
closing against a seat in the one plug, the parts being constructed and combined
substantially as described and illustrated in figures 1 and 2 of the drawings.
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