IMPROVEMENTS IN THE MODE OF CONNECTING LARGE WELDED TUBES
Year: 1884

page_text: I, HENRY HARRIS LAKE of the firm of Haseltine, Lake & Co., Patent-agents,
Southampton Buildings, in the County of Middlesex do hereby declare the nature
of the said invention for "IMPROVEMENTS IN THE MODE OF CONNECTING LARGE
WELDED TUBES a communication to me from abroad by the firm of Schulz,
Knaudt & Co, of Essen, Prussia, to be as follows:―
This invention relates to the means for making the joints of large welded tubes
of wrought iron or steel, and it consists in providing the said tubes by a rolling
process with sockets of particular form.
Hitherto tubes of this kind have been connected together by means of flanged
rings, riveted or otherwise fastened to each tube, or by separate double sockets,
or by plain rings slipped over the ends of the tubes and secured thereto. Those
methods of connection, however, present certain inconveniencies with welded tubes,
inasmuch as it is in practice extremely difficult to make these tubes perfectly
round or of absolute uniform diameter. For this reason the inventors provide one
end of each tube with a socket produced by a process of rolling on any suitable
rolling-machine, and they make the bottom of the socket conical, so that the other
tube, though deviating from the round form, will adapt itself to the form of the
conical part of the socket when pressed against the same; or that, if the tube is
somewhat below or above the normal diameter, it will nevertheless form a close
joint with the said conical socket-part.
D'
2011
1
1004
HASELTINE, LAKE & Co.,
For the Applicant.

page_text: "
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake, & Co., Patent-Agents,
Southampton Buildings, London, do hereby declare the nature of the said inven-
tion for "IMPROVEMENTS IN THE MODE OF CONNECTING LARGE WELDED TUBES,"
and in what manner the same is to be performed, as communicated to me from
abroad by Messrs. Schulz,.Knaudt & Co. residing in Essen on the Ruhr, kingdom
of Prussia, German Empire, to be particularly described and ascertained in and
by the following statement :-
This invention relates to the means for making the joints of large welded tubes
of wrought iron or steel, such as are used as conduits for water and gas, and it
consists in providing each tube by a rolling process with a socket having such form
as that the plain end of another tube may be inserted thereinto.
Heretofore tubes of this kind have been connected together by means of flanged
rings, riveted or otherwise fastened to each tube, or by separate double, sockets,
or by plain rings slipped over and secured to the ends of the tubes. These means
of connection are, however, expensive, and moreover there is a certain difficulty in
their application to large tubes made by bending wrought iron or steel plates into
a cylinder and welding their opposite edges, inasmuch as it is practically impossible
to produce in this manner tubes which have throughout their length a perfectly
uniform diameter, and an absolutely circular form. These deviations are certainly
so small that they have no influence on the tubes as conduits of water or gas;
nevertheless they present the inconvenience of rendering difficult the exécution of
the connections by the aforesaid means.
In order to reduce the cost of the joints of the said tubes, wo form on one end
of each tube by means of a rolling process, a socket adapted to receive the plain
end of another tube. On the annexed sheet of drawings Fig. 1 shows two tubes,
a and b connected by a socket d formed upon the tube b. The rolling of the
socket may be carried out on any rolling-machine by which the end of the tube
may be widened by the desired amount and upon the requisite length. A pair of
rolls suitable for this purpose is shown by Fig. 2, e and f being the rolls profiled
according to the form to be given to the socket, and b the tube with the finished
socket d.
.
For the purpose of obtaining by means of these sockets a perfect joint between
the tubes in spite of their not being quite round or uniform in diameter, we make
the bottom end of the socket in form of a cone, the sides whereof are inclined to
each other at an acute angle, as shown at c, Fig. 1. In the connection of two
tubes a and b not corresponding exactly with each other in form and diameter,
this arrangement has the effect that the end of the tube a, which is not as stiff as
the conical part of the socket d, will yield in being pressed against the latter, and
adapt itself to the form of the cone, so as to come upon its whole periphery in
contact therewith. The conical portion of the socket also ensures a close joint
between two tubes differing slightly in diameter, or which are to be connected
together at an obtuse angle.
The tubes to which the invention is applicable, may be made of any kind of
wrought iron (ie ductile or malleable iron) or of steal that can ho welded

page_text: The joints of the tubes within the sockets are tightened in any suitable known
manner.
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
1. As an article of manufacture, a welded tube of wrought iron or steel on which
a socket is formed by a process of rolling, substantially as and for the purpose
described.
2. In a welded tube of wrought iron or steel, provided with a socket produced
on the tube by rolling, the conical form of the bottom of the socket, substantially
as and for the purpose specified.
HASELTINE, LAKE & Co.,
For the Applicant.