AN IMPROVED JOINTING FOR THE COUPLING PIPES OF RAILWAY BRAKE APPARATUS WORKED BY FLUID PRESSURE
Year: 1883

page_text: LETTERS PATENT to John Imray of N° 28 Southampton Buildings Chancery
Lane in the County of Middlesex for an Invention of "AN IMPROVED
JOINTING FOR THE COUPLING PIPES OF RAILWAY BRAKE APPARATUS WORKED
BY FLUID PRESSURE" communicated to him from Abroad by Armand Camille.
Benoit-Duportail of Paris, France, Engineer
PROVISIONAL SPECIFICATION left by the said John Imray at the Office
of the Commissioners of Patents on the 31st August 1883.
JOHN IMRAY of N° 28 Southampton Buildings Chancery Lane in the county of
Middlesex AN IMPROVED JOINTING FOR THE
"
"
COUPLING PIPES OF RAILWAY
BRAKE APPARATUS WORKED BY FLUID PRESSURE [communicated to him from
Abroad by Armand Camille Benoit-Duportail of Paris, France, Engineer]
For connecting from carriage to carriage of a railway train the pipes for
communicating fluid pressure to work the brakes, pieces of flexible tubing are
usually employed, but these, at their bends from the upright pipes at the ends of
the carriages, become rapidly damaged owing to the continual to and fro flexure
which they have to sustain.
The object of this invention is to avoid this action on the flexible tubing by
connecting it in each case, not to the upright pipe itself, but to an elbow jointed
thereto in such a manner as to have freedom of lateral play. For this purpose,
the upright pipe at the end of the carriage has fixed to it an elbow presenting its
face outwards and the piece of flexible tubing is attached to and hangs down from
a corresponding elbow which is placed face to face with the elbow on the pipe and
held to it by a bolt on which it can turn as on an axis, the bolt itself being
secured by a nut and having a square part fitting a square hole to prevent it from
turning. The meeting faces of the two elbows are made, the one with an annular
projecting rib and the other with a corresponding groove which the rib enters, or
both may be made with annular grooves, so as to enclose between them a ring of
packing material.
According to a modified construction, the one elbow is made with a projecting
hollow boss, tapered like the plug of a stop-cock, entering into a corresponding
tapered socket formed in the other elbow, there being a passage for fluid through
the side of the socket elbow corresponding with a passage through the side of the
plug.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Imray in the Patent Office on the 29th February 1884.
JOHN IMRAY of N° 28 Southampton Buildings Chancery Lane in the County of
Middlesex "AN IMPROVED JOINTING FOR THE COUPLING PIPES OF RAILWAY
BRAKE APPARATUS WORKED BY FLUID PRESSURE A communication to me from
Abroad by Armand Camille Benoit-Duportail of Paris France, Engineer
"
For connecting from carriage to carriage of a railway train the pipes for
communicating fluid pressure to work the brakes, pieces of flexible tubing are
usually employed, but these, at their bends from the upright pipes at the ends of
the carriages, become rapidly damaged owing to the continual to and fro flexure
which they have to sustain.
The object of this invention is to avoid this action on the flexible tubing by
connecting it in each case, not to the upright pipe itself, but to an elbow jointed
thereto in such a manner as to have freedom of lateral play. For this purpose,
the upright pipe at the end of the carriage has fixed to it an elbow, presenting its
face outwards and the piece of flexible tubing is attached to and hangs down from
a corresponding elbow which is placed face to face with the elbow on the pipe, and
held to it by a bolt on which it can turn as on an axis, the bolt itself being
secured by a nut, and having a square part fitting a square hole to prevent it from
turning. The meeting faces of the two elbows are made, the one with an annular
projecting rib and the other with a corresponding groove, which the rib enters, or
both may be made with annular grooves, so as to enclose between them a ring of
packing material.
According to a modified construction, the one elbow is made with a projecting
hollow boss, tapered like the plug of a stop-cock, entering into a corresponding
tapered socket formed in the other elbow, there being a passage for fluid through
the side of the socket elbow corresponding with a passage through the side of the
plug.
The accompanying drawings shew details of the construction that may be
adopted for the joint by which the flexible hose pipe is connected to the upright
pipe at the end of a carriage, so as to allow for lateral oscillation without flexure
of the hose pipe. Fig. 1 is a longitudinal section shewing part of the upright
metallic pipe R and of the hose S with the joint connecting them, Fig. 2 is a
section through R, Fig. 3 is a front view, Fig. 4 is a section through S, Fig. 5
is a sectional plan of the joint and Fig. 5bis is a front view of the nut. The joint
consists of two parts facing each other, along the line B H, with a projecting
annular rib M on the one face entering a groove in the other face. One of the
parts is screwed at NO to the pipe R and the other part has the hose S secured
to it at PQ by wiring on or otherwise. The two parts are held together by a
bolt T and nut A, the bolt being square under the head to prevent it from turning.
The rib M may be rounded as in Fig. 1 or tapered as in Fig. 6, or instead of a
metallic rib, a ring of packing may be employed, as shewn in Figs. 7, 8 and 9, or
the one part of the joint may have a tapered boss entering the other part as
shewn in Fig. 10, and this boss may be extended like the plug of a stop cock as
shewn in Figs 11 and 12, the plug having a lateral passage at L and having a
screw on its end to receive a nut a over a washer A. The junction of the faces of
the joint and the bolt head may be covered by rings to prevent access of dust or
grit as shewn in Figs. 13, 14 and 15 or in Figs. 16, 17 and 18, the outer part of
the joint being made with a handle A B or C D by which it can be turned by
hand. The bolt employed in the joints shewn in Figs. 13 to 18 inclusive is made ne

page_text: shewn by Figs. 19 and 20, its nut being set up by a wrench such as is represented
by Figs. 21 and 22 or by Figs 23 an 1 24, with a hole A or a hook N to suspend a
definite weight for tightening the nut. In cases where mobility of the joint is
not required, the hose may be secured to a bend or elbow of suitable form as shewn
in Figs. 25 and 26 or in Figs. 27 and 28 or in Figs 29 and 30, but no claim is made
to these constructions.
Having thus described the nature of this invention and in what manner the
same is to be performed, as communicated to me by my foreign correspondent, I
claim :-
For the coupling of pipes of railway brake apparatus worked by fluid pressure,
connecting the flexible hose pipe to the upright metallic pipe at the end of a
carriage by a joint allowing lateral oscillation, substantially as and for the purpose
herein set forth.
In Witness whereof I the said John Imray have hereunto set my hand and
seal this twenty-ninth day February in the year of our Lord One thousand eight
hundred and eighty-four.