Improvements in the Manufacture of Hollow Cylinders, Rollers, or Tubes of Copper or Suitable Alloys of Copper.
Year: 1889

page_text: Date of Application, 8th Nov., 1889
Complete Specification Left, 10th July, 1890-Accepted, 16th Aug., 1890
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Hollow Cylinders, Rollers, or
Tubes of Copper or Suitable Alloys of Copper.
I, WILLIAM SUMNER, of 2 Brazennose Street, Manchester in the County of
Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
In constructing a hollow cylinder according to my invention I take a solid disc of
copper or what is termed in commerce "a cake of copper" preferably circular in form
which may be cast forged or otherwise prepared. In the centre of this cake when in
a red hot condition I drift a hole of the required size by means of a taper plug and a
hammer or press actuated by hydraulic steam or other power in such a manner that
practically no metal is removed from the cake. Although I prefer to drift the hole in
a solid disc or cake as described I might cast the hole in the cake or the hole might
be made by boring or punching the solid cake.
It would be possible in one or more of the operations above indicated to make
the hole of the full diameter but I prefer to make the hole smaller than the full
diameter and proceed by hammering pressing or similarly treating the cake on a
mandrel or centre piece of steel or other suitable material to enlarge the hole
therein to the required diameter and simultaneously elongate the metal in the direction
of the axis.
I now proceed by taking the annular piece or short hollow cylinder produced
from the cake of copper as described and by any of the ordinary well known
processes elongate the metal into a cylinder of the required dimensions which
cylinder can then be finished in the usual way.
By the processes described I am enabled to produce hollow cylinders rollers or
tubes of copper or suitable alloys of copper free from flaws as the metal is by the said
processes rendered dense and homogeneous.
DLI
JN 1000
H. B. BARLOW,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Hollow Cylinders, Rollers, or
Tubes of Copper or Suitable Alloys of Copper.
I, WILLIAM SUMNER, of 2 Brazennose Street, Manchester in the County of
Lancaster, 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 :-
.
In constructing a hollow cylinder according to my Invention I take a solid disc of
copper or what is termed in commerce "a cake of copper" preferably circular in form
which may be cast forged or otherwise prepared. In the centre of this cake when in
a red hot condition I drift a hole of the required size by means of a taper plug and a
hammer or press actuated by hydraulic, steam or other power in such a manner that
practically no metal is removed from the cake. Although I prefer to drift the hole in
a solid disc or cake as described 1 might cast the hole in the cake or the hole might
be made by boring or punching the solid cake.
It would be possible in one or more of the operations above indicated to make
the hole of the full diameter but I prefer to make the hole smaller than the full
diameter and proceed by hammering pressing or similarly treating the cake on a
mandrel or centre piece of steel or other suitable material to enlarge the hole

page_text: therein to the required diameter and simultaneously elongate the metal in the direction
of the axis.
I now proceed by taking the annular piece or short hollow cylinder produced from
the cake of copper as described and by any of the ordinary well known processes
elongate the metal into a cylinder of the required dimensions which cylinder can then
be finished in the usual way.
By the processes described I am enabled to produce hollow cylinders rollers or tubes
of copper or suitable alloys of copper free from flaws as the metal is by the said
processes rendered dense and homogeneous.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what 1
claim is :-
The herein described improvements in the manufacture of hollow cylinders rollers
or tubes from discs or cakes of copper or suitable alloys of copper, which improve-
ments consist in preferably first drifting a hole in each disc and then hammering or
otherwise applying pressure so as to form a roller in the rough substantially in the
manner and for the purposes specified.
Dated this 9th day of July 1890.
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicant.