Improvements in and relating to the Manufacture of Steel, Iron, and other Metallic Tubes.
Year: 1891

page_text: Date of Application, 15th June, 1891
Complete Specification Left, 11th Feb., 1892-Accepted, 19th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in and relating to the Manufacture of Steel, Iron, and
other Metallic Tubes.
I, FREDERICK HUGGINS of the Britannia Tube Works, Glover Street, City of
Birmingham in the County of Warwick, Manufacturer do hereby declare the nature
of this invention to be as follows:-
My invention consists of the improvements hereinafter described in and relating
to the manufacture of steel, iron, and metallic tubes.
My said invention consists principally in the manufacture of steel tubes having a
closed consolidated joint by which I am enabled to use steel of much less thickness
than generally used, the said tubes being particularly useful in the construction of
cycles and the like where lightness combined with strength is required, but my
invention is applicable to any kind of iron steel or metallic tubes. In the manu-
facture of steel tubes according to my invention I take a strip of sheet steel of a
suitable thickness and width to form the tube of a required strength and diameter,
the longitudinal edges of the said strip I bend inwards into the form of a U shaped
channel. I then by means of a rolling or drawing process bend the said strip into
a semi-tubular figure, the U shaped edges being turned inwardly.
I likewise take a narrow strip of sheet metal the longitudinal edges of which I
bend forming corresponding U shaped edges to those formed on the strip-intended
to form the tube. The said strip I place inside the semi-tubular shaped strip from
the end thereof, the U shaped channels of which engage in the corresponding
U shaped channels, on the semi-tubular strip, forming a kind of shell a mandril of
the size of the internal diameter of the finished tube is introduced into one end of
the shell intended to form the tube, after the mandril has been placed in position the
shell is drawn through a die or draw plate attached to an ordinary draw bench, the
result of which is to close up the Ushaped channels and to form a strong and
perfect consolidated longitudinal joint of the tube having an internally projecting
rib through its entire length thus at the same time making a cylindrical tube which
is much lighter than a lap or butt welded tube of ordinary manufacture.
Or I may apply my invention to tubes of large diameter by making the said tube
in segments and connecting them together by means of the aforesaid Ụ shaped
channels, which I may place either on the inside or outside of the said tube. My
invention may also be applied in the manufacture of any kind of ductile metallic
tubes in the aforesaid manner by slightly modifying the form of the channel without
departing from the nature or object thereof.
Dated this 15th day of June 1891
RAYNER & CASSELL,
37, Chancery Lane, London, W.C., Agents for the Applicant.

page_text: Improvements in and relating to the Manufacture of Steel, Iron, and.
other Metallic Tubes.
I, FREDERICK HUGGINS, of the Britannia Tube Works, Glover Street,
Birmingham, 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 :-
My invention consists of the improvements hereinafter described in the manu-
facture of steel, iron and metallic tubes.
My said invention consists principally in the manufacture of steel tubes having a
closed consolidated joint by which I am enabled to use steel of much less thickness
than that in general use, the said tubes being particularly useful in the construction
of cycles and the like where lightness combined with strength is required, but my
invention is applicable to any kind of iron steel or metallic tubes.
In the manufacture of steel tubes I take a strip of sheet steel of a suitable
thickness and width to form the tube of a required strength and diameter; the
longitudinal edges of the said strip I bend inwards into the form of a U shaped
channel, and then by means of a rolling or drawing process I bend the said strip
into the form of a split tube, the U shaped edges being turned inwardly.
I likewise take a narrow strip of sheet metal the longitudinal edges of which have
corresponding U shaped edges to those on the strip intended to form the tube.
This narrow strip I place inside the tubular shaped strip, the U shaped channels
of the former engaging in the corresponding U shaped channels on the semi-tubular
strip thus forming a kind of shell: a mandril of the size of the internal diameter of
the finished tube is introduced into one end of the shell intended to form the tube,
and the shell is then drawn through a die or draw plate attached to an ordinary
draw bench, the result of which is to close up the Ushaped channels and to form a
strong consolidated joint, having internally a projecting rib through its entire
length thus at the same time making a cylindrical tube which is much lighter than
a lap or butt welded tube of ordinary manufacture.
may apply my invention to tubes of large diameter by making the said tubes in
segments and connecting them together by means of the before mentioned U shaped
channels or strips which may be placed either on the inside or outside of the said
tube.
My invention may also be used in the manufacture of any kind of ductile metallic
tubes, in the aforesaid manner by slightly modifying the form of the channel without
departing from the nature or object thereof.
I will describe my said invention with reference to the accompanying drawings:
Figure 1, represents a strip of sheet steel in width equal to the diameter of the
tube about to be formed.
Figure 2, represents the same strip with the longitudinal edges bent inwards
forming the U shaped channel b, c.
Figure 3, shows the same strip bent in the form of a split tube with the edges b
and c turned inwardly.
Figure 4, represents a narrow strip of sheet steel, which I bend into the form
shown at Figure 5, the U shaped edges d and e I turn outwards.
Figure 6, shows the complete tube with the U shaped edges d and e Figure 5
engaging in the similar shaped edges b and c of the tube which having been passed
through a die or draw plate produces the consolidated joint f.
Figures 7 and 8, show modifications of my invention applied to tubes of large
diameter made up in segments g, h, k and m the same being connected together by
strips similar to that represented in Figure 5, and locked together in like manner
to the joint Figure 6.

page_text: 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 :-
(1.) The improvements in and relating to the manufacture of steel, iron and other
metallic tubes from a strip Figure 1, with a consolidated longitudinal joint formed
by the interlocking edges b, c and d, e, substantially as above described, and shown
in the drawings, and for the purpose set forth.
(2.) The modifications of the consolidated joint claimed above applied to tubes
constructed and arranged substantially as herein described and shown in Figures 7
and 8, of the accompanying drawings and for the purpose set forth.
Dated this 11th day of February 1892.
RAYNER & CASSELL,
37, Chancery Lane, London, W.C., Agents for the Applicant.