Improvements in the Construction of Metallic Tubes to be Used in the Manufacture of Umbrellas, Bedsteads, Bicycle-tubes and Rims, and for other purposes.
Year: 1893

page_text: Date of Application, 14th June, 1893
Complete Specification Left, 10th Oct., 1893-Accepted, 11th Nov., 1893
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Metallic Tubes to be Used in
the Manufacture of Umbrellas, Bedsteads, Bicycle-tubes and
Rims, and for other purposes.
1 JAMES HUDSON, of 187 Monument Road, Edgbaston, in the City of
Birmingham Tube Manufacturer, do hereby declare the nature of this invention to
be as follows:-
In my improved method of drawing tubes to be used for the purposes described
in the title I first draw fiom a strip of steel, or other suitable metal a tube having
its two edges turned outwards to a suitable distance. I then pass this tube through
another die which forces the said outer edges outwards thus forming them into
a V. next provide a second narrow strip of metal, and pass it through suitable
dies, and by this means turning its edges inwards, and of such a size that it shall
take over and closely fit upon the outward turned edges of the first described tube.
I then place the last described strip of metal over the outward turned edges of the
first described tube. These are then placed upon a suitable maundiel and are then
drawn through a die of the required size. This operation firmly closes the two
sections of the tube together and a strong and perfect tube is thus formed.
Dated this Thirteenth day of June One thousand eight hundred and ninety-
JAMES HUDSON..
COMPLETE SPECIFICATION.
Improvements in the Construction of Metallic Tubes to be Used in
the Manufacture of Umbrellas, Bedsteads, Bicycle-tubes and
Rims, and for other purposes.
I, JAMES HUDSON, of 187 Monument Road, Edgbaston, in the City of
Birmingham, Tube Manufacturer, do hereby declare the nature of my invention
for IMPROVEMENTS IN THE CONSTRUCTION OF METALIC TUBES TO BE USED
IN THE MANUFACTURE OF UMBRELLAS, BEDSTEADS, BICYCLE TUBES, AND
RIMS, AND FOR OTHER PURPOSES, and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:-
In my improved method of drawing tubes to be used for the purposes described in
the title 1 first draw from a strip of steel, or other suitable metal, a tube having its
two edges turned outwards to a suitable distance. I then pass this tube through
another die which forces the said cuter edges outwards, thus forming them into
a V. I next provide a second narrow strip of metal, and pass it through suitable
dies, and by this means turning its edges inwards, and of such a size that it shall
take over and closely fit upon the outward turned edges of the first described tube.
I then place the last described strip of metal over the outward turned edges of the
first described tube. These are then placed upon a suitable mandrill and are then
drawn through a die of the required size. This operation firmly closes the two
sections of the tube together, and a strong and perfect tube is thus formed. This
joint may be either on the convex, or in the concave of the rim.
As a modification of my invention I sometimes solder the joint of the tube and
the before mentioned strip of metal and this may be done either on the outside or
inside of the said tube in any convenient manner.
That my invention may be

page_text: better understood I have annexed drawings thereof which I will now proceed to
describe.
The same letters of reference denote the same parts in every figure in which they
occur.
Every figure in the drawings represents a cross section of the tube made
according to my invention, or of the separate parts thereof, either in one of the
stages of manufacture, or as a complete article.
a represents a tube which I forme in a well known manner by drawing a flat strip
of metal, preferably steel, through a die or dies.
The tube a as shaped in the first stage of manufacture shewn in Figure 1 is not
perfectly closed, but has the edges of the strip of which it is formed turned out-
wards at B B to a distance proportionate to the size of the tube. I then pass the
tube of the section shewn in Figure 1 through another die which bends the
edges B. B down and also forces them outwards somewhat in the shape of
the capital letter V as shewn in Figure 2. 1 next provide a flat strip of metal,
much narrower than that from which the tube a was formed and I
pass it through
dies which are shaped so that when the strip has passed through them it shall have
its edges turned inwards and shall have a cross section of the shape shewn in
Figure 3. It is also of such a size as to fit closely on the edges B B, as shewn in
Figure 2.
I then place the strip on the tube a so that the parts c 1 c 1 overlap and closely
fit the edges B. B on the tube as shewn in Figure 4. I then pass the tube a
having the strip c upon it, through dies which bend down the edges B. B closer to
the tube, and at the same close down the strip c upon the edges B B as shewn in
Figure 5.
The final process in making the tube is to pass it through a die which is so
shaped as to make the outer surface of the tube smooth, and to transfer the
inequality caused by the extra thickness of metal to the inside of the tube as shewn
in Figure 6.
The two latter operations may sometimes be effected in one pass through the
dies, thus the tube entering the dies having the cross section shewn in Figure 4 and
leaving them with that shewn in Figure 6.
In the drawings for the sake of clearness the space between the edges B B see
Figures 1. 2.4 and 5 is shewn wider in proportion than it really is.
Figure 7 shews the rim of the wheel of a bicycle, or other light vehicle con-
structed according to my invention. Here the rim is tubular, and the joint is shewn
at the thickened portion, the difference in the section of the tube being crescent
instead of circular, is caused in a well known manner by the drawing or passing of
the tube through appropriate dies.
Figure 8 shews a tube such as is used in the manufacture of bedsteads made
according to my invention.
Tubes for umbrellas are similar in cross section, but smaller than bedstead tubes.
In a modification of my invention 1 solder the joint in the tube which is made as
herein before described either on the outside or on the inside. I use tubes made
with soldered joints principally, though not exclusively, for such purposes as wheel
rims as shewn in Figure 7 where much work has to be put upon the tube to bring
it to its final cross section after the joint has been made, as I have found that
without the use of solder the joints of tubes so treated would open.
Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed I declare that what I
claim is
1. The manufacture of a metalic tube suitable for umbrellas, bedsteads, bicycle
tubes, wheel rims and other purposes by drawing a strip of metal through dies which
form it into a partially closed tube having its edges turned outwards, and placing
over such edges a narrow strip of metal having its edges turned inwards and over-
lapping the edges of the first named partially closed tube then passing the tube

page_text: through dies which close the joint in the manner herein before described and
illustrated in the accompanying drawings.
2. The manufacture of tubes in the manner described in my first claim, but with
the joints soldered either on the outside or on the inside in the manner hereinbefore
described and illustrated on the accompanying drawings.
3. The manufacture of metalic tubes suitable for umbrellas, bedsteads, bicycle
tubes, wheel rims and other purposes in the manner hereinbefore described, and
illustrated in the accompanying drawings.
Dated this 9th day of October 1893
JAMES HUDSON.