Year: 1897

page_text: I, ARTHUR EDWARD BECK, of Aston Tube Works, Plume Street, Aston, in the
County of Warwick, Manufacturer, do hereby declare the nature of this invention
to be as follows:-
This invention consists of improvements relating to the manufacture of tubes,
my object being to readily produce seamless or solid drawn tubes with thickened
ends or with a varying thickness of metal.
In the production of seamless steel tubes with the one end thickened, in accord-
ance with my invention, suitable for the steering head of a cycle or for other
purposes, I employ a mandrel made up of a number of short lengthis jointed
Each of such
together by screwed ends or in any other convenient manner.
mandrel lengths or sections is of a conical or tapered configuration, the larger
end regulating the thickness of metal at the thin end of the tube whilst, the
smaller end of the section fixes the dimension at the thick end, the jointed mandrel
with the tube to be reduced is drawn through the die or dies of a drawbench or
like machine in the ordinary manner, and owing to the tapered form of the
mandrel sections the finished tube whilst parallel or of a uniform diameter exter-
nally will have an internal diameter. By cutting or dividing the tube into
lengths corresponding with the sections of the mandrel I obtain on disjointing
and removing the mandrel sections a number of short tubes of the same external
diameter but with the metal thick at one end than the other.
In the production of tubes with a greater thickness of metal at the centre or
middle portion than at the ends, I employ a joined or sectional mandrel having
each length or section with its maximum diameter at the centre of its lengths
and gradually tapering such diameter towards each end. After drawing the tube
upon such a mandrel in the ordinary manner, I cut or divide the tube at the
positions coinciding with the maximum, diameter of each mandrel section and
thus obtain a number of tubes of the same external diameter but with the metal
thicker at the central or middle portion than at the ends. By reeling the tubes
in a reeling machine, the diameter is sufficiently enlarged throughout to permit of
removal from the tapered mandrel.
In the production of tubes with each end having a greater thickness of metal than
the central or middle portion I employ a mandrel either in one length or in
sections, which is turned down at the required distances, corresponding with the
required tube lengths, to a diameter necessary. to give the additional thickness
of metal at the tube ends.
After the drawing process, the tube is cut or divided into lengths and subjected
to the action of a reeling machine to permit of its removal from the mandrel.
1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.

page_text: Improvements relating to the Manufacture of Tubes.
I, ARTHUR EDWARD BECK, of Aston Tube Works, Plume Street, Aston, in the
County of Warwick, Manufacturer, 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 consists of improvements relating to the manufacture of tubes,
my object being to readily produce seamless or solid drawn tubes with thickened
ends or with a varying thickness of metal.
In order that my invention may be the more readily understood, I append
hereunto a sheet of explanatory drawings to be hereinafter referred to.
Figure 1 is a sectional view illustrating the production of tubes thicker at one
end than at the other, whilst Figures 2 and 3 are similar views respectively illus-
trating the production of tubes with a greater thickness of metal at their central
portion than at the ends, and tubes with both ends thickened.
In the production of seamless steel tubes with one end thickened in accordance
with my invention, suitable for the steering head of a cycle or for other purposes,
I employ a taper mandrel preferably made up of a number of short lengths
as A, A, and A2, Figure 1, jointed together by screwed ends or in any other
convenient manner. Each of such mandrel lengths or sections is of a conical or
tapered configuration, the larger end regulating the thickness of metal at the
thin end of the tube whilst the smaller end of the section fixes the dimension at
the thick end. The jointed mandrel with the tube to be reduced is drawn through
the die or dies of a draw-bench or like machine in the ordinary manner, and owing
to the tapered form of the mandrel sections the finished tube whilst parallel or
of a uniform diameter externally will have a varying internal diameter. By
cutting or dividing the tube into lengths as B, B', and B², corresponding with
the sections of the mandrel I obtain on disjointing and removing the mandrel
sections, a number of short tubes of the same external diameter but with the
metal thicker at one end than at the other. The completed tube is detached
from its mandrel by drawing the latter through a die which is large enough to
permit the mandrel to pass through it but of less, diameter than the external
diameter of the tube; thus the tube is held back whilst the mandrel is withdrawn
from it.
In the production of tubes with a greater thickness of metal at the centre or
middle portion than at the ends, I employ a mandrel preferably of a jointed
or sectional type such as hereinbefore described having each length or section
as CC, and C, with its maximum diameter at the centre of its length and
gradually tapering from such diameter towards each end. After drawing the
tube upon such a mandrel in the ordinary manner, I cut or divide the tube at
the positions coinciding with the maximum diameter of each mandrel section
and thus obtain a number of tubes as DD', and 12 of the same external diameter
but with the metal thicker at its central or middle portion than at the ends. By
reeling the tubes in a reeling or releasing machine the diameter is sufficiently
enlarged throughout to permit of removal from the tapered mandrel.
In the production of tubes with each end having a greater thickness of metal
than the central or middle portion I employ a mandrel either in one length or
in sections which is turned down at the required parts as E and E¹ corresponding
with the required tube lengths, to a diameter necessary to give the additional
thickness of metal at the tube ends. After the drawing process the tube is cut or
divided into lengths as FF1 and F and subjected to the action of a reeling

page_text: machine until sufficiently expanded to permit of the thickened portions being
drawn over the larger diameter of the mandrel thus enabling the tube to be
readily detached from the mandrel.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. The production of seamless or solid drawn tubes with thickened ends or with
a varying thickness of metal, substantially in the manner described and as
illustrated.
2. In the manufacture of seamless or solid drawn tubes with thickened ends
or with a varying thickness of metal, the use of a mandrel made up from a
number of detachably connected parts or sections, substantially as described and
as illustrated.
3. In the manufacture of seamless or solid drawn tubes with thickened ends
or with a varying thickness of metal, effecting the withdrawal of the said tubes
from the mandrels by subjecting them to the action of a reeling or releasing
machine until sufficiently expanded to permit of the thickened portions being
drawn over the larger diameter of the mandrel, substantially as described.
1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant.