An Improved Method of Forming Sockets on Tubes or Pipes of Wrought Iron, Steel, and the like.
Year: 1895

page_text: Date of Application, 23rd Apr., 1895-4ccepted, 24th May, 1895
COMPLETE SPECIFICATION.
An Improved Method of Forming Sockets on Tubes or Pipes of
Wrought Iron, Steel, and the like.
A communication by RUDOLF CHILLINGWORTH, of No. 1, Fabrikstrasse,
Nuremberg, in the Empire of Germany, Metal Stamper.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street,
Manchester, both in the County of Lancaster, 118, New Street, Birmingham,
in the County of Warwick, and 31, High Holborn, in the County of Middlesex,
Civil 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 :—
This invention has for its object the formation of sockets on iron, steel, or the
like, tubes or pipes, which sockets are formed in one piece with the tube. The
production of such a socket is shown in the accompanying drawings in its various
stages of development.
On a section of pipe or tuber, Figure 1, whilst in a heated condition; there is
first formed a swelling or protuberance c of suitable height by means of a core a
which passes through the tube and is supported outside the same, which core has a
suitable projection 6 (see Figure 2).
This is effected by means of a suitable press, the stamp of which is provided
with suitable recesses, and bears against the tube so as to form the same over the
projection b, the rounded shape of the tube however being preserved owing to the
shape of the core a and the recess in the stamp. If it be desired to proceed
further, and by the introduction of another core a with a larger projection b to
increase the protuberance c up to the desired extent and height, the material
would usually become ruptured and a useless article would be produced.
The essential part of this invention consists in boring or stamping a hole (as
shown in Figure 4) in the end of the protuberance obtained by the previous
treatment.
By this means, on the tube being further pressed over a core with a larger
projection, the perforated end of the protuberance is raised up and may be formed
into the desired socket as shown in Figure 5.
For this further pressing a core is preferably employed which consists of two
parts as shown in Figure 5, one part a which is provided with a projection band is
kept somewhat thin resting upon the other part a², which as far as possible fills up
the sectional area of the tube which is to be treated.
The most varied articles may be made with the process hereinbefore described
from one piece of tube, such articles being hitherto only obtainable by casting,
such for instance as branch sockets or joints for water mains, etcetera. Figures 6
and 7 show a bottom bracket for bicycles, which is made of one piece of tube and
has four sockets in close proximity.
In the manufacture of the sockets the centre of the tube becomes somewhat
drawn in, but this comparatively small narrowing or reduction in size may be
removed after the completion of the above treatment.

page_text: Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated
to me by my foreign correspondent, I declare that what I claim is :—
1. An improved pipe or tube of wrought iron, steel or the like having sockets
formed in one piece therewith by pressing substantially as described.
2. An improved method of forming sockets on wrought iron, steel or the like,
tubes or pipes, consisting in first raising on the tube or pipe, a swelling or
protuberance by pressing (Figures 2 and 3), forming a hole (Figure 4) in the end
of said protuberance, and then by further pressing raising up and broadening said
protuberance to form a socket (Figure 5) substantially as described.
Dated this 22nd day of April 1895.
WM. P. THOMPSON & Co.,
Agents.