IMPROVED MACHINERY FOR MAKING METAL TUBES."
Year: 1874

page_text: LETTERS PATENT to George Bourne, of Birmingham, in the County
of Warwick, Tube Manufacturer, for the Invention of "IMPROVED
MACHINERY FOR MAKING METAL TUBES."
PROVISIONAL SPECIFICATION left by the said George Bourne at the
Office of the Commissioners of Patents, with his Petition, on the
4th April 1874.
I, GEORGE BOURNE, of Birmingham, in the County of Warwick,
Tube Manufacturer, do hereby declare the nature of the said Invention
for "IMPROVED MACHINERY FOR MAKING METAL TUBES," to be as follows:-
My Invention specially refers to taper tubes, and consists of a series
of tools or dies suitably set in an upright frame. The lower tool has a
longitudinal groove or depression upon its face; the upper die when
fixed presents a convexed face, and between these dies I place a strip of
metal designed for a taper tube, in order that when pressure is exerted
upon the upper die and motion imparted to it downwards it forces the

page_text: strip of metal into the longitudinal groove in the lower die and is
gradually shaped for the second process.
In another pair of tools set in like manner the face of the upper and
lower dies is concaved for the reception of the part formed tube with
the first pair of tools. When this piece of metal is placed in the lower
die an immediate pressure is brought to bear upon the sides and edges
by forcing the upper concaved die into the concave of the lower die.
By these means a taper tube is formed with facility of various length
and diameter, and the use of cup rolls superseded.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Bourne in the Great Seal Patent Office on
the 3rd October 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
BOURNE, of Birmingham, in the County of Warwick, Tube Manufacturer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of April, in the
year of our Lord One thousand eight hundred and seventy-four, in
the thirty-seventh year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said George Bourne, Her
special licence that I, the said George Bourne, my executors, adminis-
trators, and assigns, or such others as I, the said George Bourne, my
executors, administrators, and assigns, should at any time agree with,
and no others, from time to time, and at all times thereafter during
the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention for "IM-
PROVED MACHINERY FOR MAKING METAL TUBES," upon the condition (amongst
others) that I, the said George Bourne, my executors or administrators, by
an instrument in writing under my, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and cause.
the same to be filed in the Great Seal Patent Office within six calendar

page_text: Patent.
3
NOW KNOW YE, that I, the said George Bourne, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement in writing, and on reference being had to the.
accompanying Drawings, that is to say:-
The object of this Invention is to facilitate the manufacture of metallic
taper tubes generally.
In carrying my Invention into practical effect I construct a machine
with a horizontal-beam working in the sides of the frame, and to this
beam I connect one of a series of tools, and below it in a sliding rest or
other arrangement I fix a bed or die. The tool in the beam and also
the bed or die have grooved surfaces, or the bed may be slotted.
In order to produce a taper tube I place a strip of sheet iron upon
the face of the bed or die, and (motion being communicated as usual or
in any suitable manner to the machine) cause the beam with the tool in
it to descend so as to exert direct pressure upon the strip of metal, and
force it into the groove or slot of the bed. or die, and shape it for a
succeeding operation. To perform which I remove the tool first placed
in the beam.and replace it by a tool analogous to a taper mandril, and
also remove the bed or die and substitute for it another grooved bed or
die, and in the said groove I place the sheet iron partly shaped in the
first process as above described, and (actuating the beam as before
mentioned) cause the tool now in it to be fed into the partly formed
tube in the bed or die, and with pressure to assume such shape as is
necessary for the concluding operation. To perform which I substitute
for the tool and the bed used in the lastly described operation a tool and
a bed or die having grooved surfaces, the groove in the tool in the beam
being wider than that in the bed or die below it, in order that the beam
when in motion shall force its tool upon the upper sides of the partly
formed tube in the grooved bed, so as to cause the edges to close
gradually until they meet, forming the tapering tube, which is then
finished in the ordinary manner; thus according to my improved method
metallic taper tubes are made with great ease and facility.
On the accompanying Drawings Figure 1 represents a perspective
view of a machine adapted for working my Invention. 1 is the beam;
:

page_text: 2, the grooved tool; and 3, the grooved bed or die in the sliding rest 4,
the said tools being those used in the first of the above described
operations.
:
Figure 2 represents the tool, having a taper bolt or mandril 5; and
Figure 3, the bed or die with the groove 6 used in the second of the
above described operations; and Figure 4 represents the grooved tool 7;
and Figure 5, the bed or grooved die 8 used in the concluding operation.
The said tools may be screwed or otherwise connected or attached
to any suitable machine or framework capable of carrying out my said
Invention.
Having now particularly described and ascertained the nature and
object of my said Invention, together with the manner in which the
same is to be or may be performed or carried into practical effect, I
would remark in conclusion that I do not restrict myself to the precise
details as shewn on the accompanying Drawings and described herein,
as regards the exact shapes or sizes of the tools and beds or dies, or the
series thereof, nor do I restrict myself to or claim the particular form
of machine shewn in the said Drawings and described herein; but what
I claim as of my Invention is, the use of a series of upper tools and
lower dies or beds substantially as in the manner and for the purposes
herein described and specified, and as illustrated on the accompanying
Drawings, and the application thereof for the purposes specified to any
suitable machine or framework capable of working in connection there-
with, so as effectively to carry the said Invention into practice.
In witness whereof, I, the said George Bourne, have hereunto set
my hand and seal, this First day of October, in the year of our
Lord One thousand eight hundred and seventy-four.
Witness,
ALFRED GEORGE WRIGHT.
GEORGE BOURNE. (L.S.).