Improvements in and relating to the Making of Metal Tubes.
Year: 1896

page_text: Date of Application, 15th Oct., 1896
Complete Specification Left, 26th Oct., 1896-Accepted, 23rd Jan., 1897
PROVISIONAL SPECIFICATION.
Improvements in and relating to the Making of Metal Tubes.
1 THOMAS TAYLOR Tube Manufacturer of Empire Works Great Tyndal
Street Birmingham in the County of Warwick do hereby declare the nature of
this invention to be as follows:-
This invention consists in the production of a lap-jointed D shaped tube, a lap-
jointed oval tube, or a lap-jointed tube of any other desired transverse section
for use in the make up of cycles and for other purposes, direct from the
flat strip or skelp over and between an inner and an outer die of the required
form.
Hitherto D shaped tubes have been made by first producing a round tube and
then by a second process converting the round tube into a D shaped tube, in a
like manner oval tubes have been produced from round tubes.
In carrying out my invention in relation to the D shaped tube I provide a male
die the transverse section of which is D shaped, on the flat side of such die I
provide a sinking or groove the width of which would correspond with the width
of lap to be produced on the tube; I next provide the female-die in which is a
corresponding D shaped passage but of extra dimensions equal to double the
thickness of the skelp used in making the tube.
I next introduce the skelp within the dies in the manner usual in drawing tubes
and thus press one part of the skelp into male-die groove thus producing a
D shaped tube with a lap-joint at one operation, the lap-joint is next brazed
together in the usual manner.
In producing tubes of oval transverse section I proceed in the manner herein-
before described in relation to D shaped tubes, excepting that the male and female
dies would be oval, the lap-groove being formed on the edge, or on the face of the
male die, so as to produce the lap-joint on the edge, or on the face as may be
required.
In producing hexagonal or other polygonal shaped tubes the dies would be
formed of the required shape and the groove in the male die would be formed on
that face most suitable for use in forming the lap-joint.
The essential part of my invention consists of drawing a tube of a D shape, an
oval shape, or of any other shape, in each case at one operation with an open
lap-joint ready for brazing.
Dated this 10th dox of October 1896
ALFRED WILLIAM TURNER,
Cobden Buildings, Corporation Street, Birminghain,
Agent for the Applicant..

page_text: Improvements in and relating to the Making of Metal Tubes.
I THOMAS TAYLOR Tube Manufacturer of Empire Works Great Tyndal
Street Birmingham in the County of Warwick 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 in producing a lap-jointed D shaped tube or a lap-
jointed oval shaped tube, or a lap-jointed tube of any other desired transverse
section for use in the make up of cycles as a primary purpose, and for use in the
make up of other structures as a secondary purpose, such improved make of tubes
being produced direct from the flat strip or skelp at one operation over a male die
of the required form.
I will now proceed to describe in relation to the accompanying drawings the
manner in which my invention is carried out.
Figure 1 represents a broken-off side view of the male die.
Figure 2 represents a transverse section of Figure 1 on the line A. B.
Figure 3 represents a broken-off portion of female-die.
Figure 4 represents a side view of a tube produced by my improved method.
Figure 5 represents an end view of an Figure 4.
Figure 6 represents a plan of Figure 1.
Figure 7 represents an end view of an hexagonal tube produced by my improved
process.
Figure 8 represents an end view of a pentagonal shaped tube produced by my
improved process.
Figure 9 represents an end view of an oval tube produced by my improved
process.
Hitherto D shaped tubes have been made by first producing a round tube and
then by a second process converting the round tube into a D shaped tube, in a
like manner oval tubes and polygonal shaped tubes of various angles have been
produced from round tubes.
In carrying out my invention in relation to the D shaped tube I provide a male-
die as shewn at Figures 1-2 and 6, the transverse section of such male-die being
D shaped, on the flat side of the die I provide a sinking or groove a the width of
which would correspond with the width of lap to be produced on the tube; I next
provide the female-die as shewn broken-off at Figure 3 in which is the receiving
passage c, such passage being of extra dimensions to the transverse section of
male-die, such extra dimensions being equal to nearly double the thickness of the
skelp used in making the tube, the back-end of the male-die may be formed with
a projecting arm at d or in lieu of the projecting arm a rod or tube may be
screwed into the tapped end at e.
I next mount the female-die between or against the die-rest of draw-bench and
then introduce the skelp over the end of male-die within the female-die, ready for
drawing through in the manner usual in drawing skelps into open-jointed tubes
and by so drawing-through, press one edge part of skelp into the male-die-groove a,
thereby producing a D shaped tube with the edge lapping-strip fat one operation,
the lapping-stripfis next brazed over the other edge-face g to form a completed
D shaped tube."
In producing tubes of oval transverse section I proceed in the manner herein-
before described in relation to D shaped tubes excepting that the male and female
dies would be oval, the lap-groove a being formed on the face of the male-die so
as to produce the lapping-strip f', or on the edge of the male die so as to produce
the lapping-strip on either of the edges h or; of the oval tube.

page_text: In producing hexagonal, pentagonal or other polygonal shapes of tubing the
dies would be formed of the desired shape and the groove a in the male-die
provided on the face, so as to produce the lapping-strip on the face as shewn at f
Figure 7, and at f³ Figure 8 or so as to produce the lapping-strip at either
angle.
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 I
claim is
1st. A D-shaped lap-jointed tube produced at one tube-drawing operation, the
lapping-strip being formed on one edge-face of skelp to take over the other edge-
face of skelp, the lapping-strip being brazed to the other edge of open-tube. as
illustrated and described in relation to Figures 1, 2, 3, 4, 5, and 6.
2nd. An oval-shaped lap-jointed tube produced at one tube-drawing operation,
as illustrated and described in relation to Figure 9.
3rd. A polygonal shaped lap-jointed tube produced at one tube-drawing
operation, as illustrated and described in relation to Figures 7 and 8.
4th. In the making of lap-jointed tubes from the skelp at one operation, the
utilization of a male-die in which is formed a sinking or groove as illustrated at a
Figure 2.
Dated this 22nd day of October 1896
Witness-
A. W. TURNER,
Cobden Buildings, 67 Corporation Street,
Birmingham,
Patent Agent.
THOMAS TAYLOR.