Improved Flanged Pipe Joint.
Year: 1898

page_text: :
PROVISIONAL SPECIFICATION.
Improved Flanged Pipe Joint.
We, ELMORE'S GERMAN & AUSTRO-HUNGARIAN METAL Co. LD., of Broad Street
Avenue, in the City of London, do hereby declare the nature of this invention
(as communicated to us from abroad by Paul Ernst Preschlin, of Schladem a/d Sieg,
Rhenish Prussia, Factory Manager,) to be as follows:
—
This invention relates to an improved construction of flanged joint for com-
paratively thin copper and brass pipes, whereby the various disadvantages that
arise from the existing modes of forming such flanged joints are obviated.
According to this invention the end of the pipe is conically enlarged somewhat,
and into such enlargement is then fitted a metal ring, preferably of phosphor
bronze, the outer surface of which is tapered so as to fit the internal taper of the
end of the pipe, while the internal surface is cylindrical and of about the same
diameter as the internal diameter of the pipe. The end of the pipe is then bent
inwards so as to embrace the outer end of the inserted ring, which is by preference
rounded for this purpose, and over the tapered enlarged end of the pipe is fitted a
ring having an internal taper more or less corresponding to the taper of the
enlargement, which ring has a flange for the reception of screw bolts.
The ends of the two pipes to be joined having both been prepared and provided
with flanged rings as above described, they are brought together with the inter-
position of a suitable packing ring, such as a copper or other soft metal ring of
a cross-shaped section, and the two ends are then drawn tightly together by screw
bolts passed through the flanges. For insuring the accurate juxtaposition of the
pipe-ends and flanged rings, the latter may be formed with annular projections
on their meeting faces, so formed as to slide over each other when drawn
together. In order to avoid the possibility of the comparatively thin metal of the
pipe cracking at the point where it is nipped between the flanged ring and the
internal tapered ring of the pipe, the outer surface of the latter and the internal
surface of the former are slightly rounded so that the internal surface of the
flanged ring only nips the pipe at about the middle of its width and gradually
recedes therefrom at the other parts, so that all more or less sharp nipping edges
are avoided.
Dated this 13th day of January 1898

page_text: (as communicated to us from abroad by Paul Ernst Preschlin, of Schladem a/d Sieg,
Rhenish Prussia, Factory Manager) and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:-
This invention relates to an improved construction of flanged joint for com-
paratively thin copper and brass pipes, whereby the various disadvantages that
arise from the existing modes of forming such flanged joints are obviated,
as will be described with reference to the accompanying drawing which is a
longitudinal section of parts of two pipes joined together according to this inven-
tion.
Each pipe A has its mouth conically widened as at B and within this mouth is
fitted a metal ring C preferably of phosphor bronze, or like metal, this ring having
externally a taper nearly fitting that of the pipe mouth and internally a cylindrical
face parallel to the axis of the pipe and about the same as its internal diameter;
the front. end of the ring is semicircularly rounded at 1) and over this rounded
end the end of the pipe is bent.
Outside the two pipes thus prepared are fitted flanged rings E and F these.
having been strung on the pipes before their ends were widened.
In order to centre these rings relatively to one another, it is preferred to make
them with projecting lips e and f the one fitting within the other. Between the
rounded ends of the pipes is interposed a packing ring which may be as shewn of
cruciform section; the two rings E and F are then drawn together by screwing
up nuts on bolts G passing through their flanges, the rounded ends of the pipes
being thus strained against the packing ring so as to form a tight joint. In order
to impose the pressure of the rings upon the metal of the pipes where it is least
liable to be injured by pressure the rear parts of the rings Care
shaped at C so as to be somewhat less in diameter than the parts
of the pipe facing these parts, and the front and rear parts of the
rings E and F are shaped respectively at e¹ and f¹ and 2 and 7 so as to be
somewhat larger in diameter than the parts of the pipes facing them. Thus the
pressure of the rings is imposed chiefly on the metal of the pipes where there is
little or no bending of the metal.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
A flanged pipe joint formed by widening the mouths of the pipes, fitting
within the widened mouths, rings having rounded ends, bending the edges of the
pipe mouths over these rounded ends fitting outside the widened parts of the pipes
flanged rings provided with bolts and nuts, interposing a suitable packing ring
between the rounded ends of the pipes, and drawing together the flanged rings by
screwing up the nuts on the bolts, substantially as described.
Dated this 3rd day of September 1898
ABEL & IMRAY,
Agents for the Applicants.