An Improved Method of and Means for Making Joints in Metallic Tubes or Pipes.
Year: 1897

page_text: Date of Application, 19th Mar., 1897-Accepted, 22nd May, 1897
COMPLETE SPECIFICATION.
An Improved Method of and Means for Making Joints in Metallic
Tubes or Pipes.
I, REINHARD FELSCHE, of 3 Victoriastrasse, Magdeburg, in the German.
Empire, Engineer, do hereby declare the nature of this invention 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 improvements in means for effecting the junction of one-
length or piece of metallic tube or piping with that of another, which has hitherto
been accomplished by the means of hard soldering or brazing, which is expensive,
tedious and to some extent uncertain, and it frequently happens that by the filing
or otherwise removal of the slag of such a joint, the substance of the tube or pipe
itself becomes materially reduced, to the detriment of the strength or stability of
the same, and my said invention is designed with a view to make such joints.
more expeditiously, at less cost and with greater strength and certainty than has
hitherto been possible by the means above referred to, and although the method.
and means of making such joints according to my invention are applicable for use
with any joint not afterwards exposed to an intense dry heat, the same is.
particularly adapted for effecting the joints of cycle frames and the like.
The principle of my invention consists in expanding or slightly enlarging the-
mouth of the socket or orifice into which the end of a length of tubing has to be
inserted and fixed, and the contraction of the diameter of the said end, so that when.
so inserted a space or cavity exists between the one and the other, and into this space-
I pour molten metal, and directly this sets the joint is made.
In order to explain the system constituting my invention, let it be assumed that.
a cycle frame is in course of construction, and that the end of a length of tubing is
to be connected to a socket, say, forming part of the bottom bracket, it is usual.
that such socket is of such diamater as to barely admit the insertion of the end of
the said length of tubing. For the purposes of my invention, in such a case, I
insert within the mouth of the said socket any form of tool by which I can expand.
the diameter of the said mouth, and by means of a vice or other suitable tool.
I contract or lessen the diameter of the end of the tube to be connected thereto, so..
that when the latter is placed within the former an appreciable space exists.
between the one and the other, and while the two said parts are held together with
the mouth of the socket uppermost I pour into, and fill up the said space with any
suitable molten metal, or may be some other material adaptable for the purpose,.
and when this is cold and set the joint is made, and if the inner surface of the socket
piece and the outer surface of the end of the said length of tube have been previously
roughened or jagged so as to form a key for the said molten metal the strength of
the said joint would be enhanced.
In cases where two parts of dissimilar dimensions have to be joined together, it
may not be necessary to expand the larger or embracing part, or to contract or
lessen the diameter of the smaller part, but to simply place the one within the other
and fill up the space between them in the manner stated. By the same rule if twc
lengths of tubing of equal diameter have to be joined together, it would only
be necessary to expand the one and contract or lessen the other in the manner
stated, and fill with molten metal or other hard setting substance the space between
them as set forth.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, declare that what I
.claim is.
As an improved means for making joints in metallic tubing or piping, the use and
application of the herein described system of enlarging or expanding the diameter
of the one or embracing part, and contracting or lessening the diameter of the
smaller or lesser part, and inserting the one within the other and filling up the space
between them with molten metal or other suitable material, substantially as herein.
-set forth.
GEO. THOS. HYDE,
1 Broad Street Buildings, London, E.C., Agent for the Applicant.