Improvements relating to the Manufacture of Steel Tubes.
Year: 1896

page_text: Date of Application, 14th Mar., 1896
Comolete Specification Left, 26th Nov., 1896-Accepted, 13th Feb., 1897
PROVISIONAL SPECIFICATION.
Improvements relating to the Manufacture of Steel Tubes.
I, WILLIAM STARLEY of St. John's Works Coventry in the County of Warwick,
Cycle Manufacturer do hereby declare the nature of this invention to be as
follows:-
This invention consists of improvements relating to the manufacture of steel tabes,.
my object being to produce by a series of simple operations a strong and durable tube
from sheet steel for cycle construction and for other purposes.
In carrying my invention into effect I cut the tube strips to the required width
from sheet steel and roll the same through a series of rolls into the tubular shape.
During the rolling process I bend out each edge of the strip, preferably to a trough
shape and in such a manner that on the completion of the rolling operations such
edges shall be caused to overlap each other, and to form a projecting rib along the
tube, thus strengthening the saine and enabling the edges to be readily and effectually
brazed together.
I form the tube with the projecting rib to the finished shape preferably by
drawing the same through a suitable die, thus closing the edges on to each other, prior
to the operation of brazing them together.
I preferably form the tube to the completely finished shape without heating the
strip other than for annealing the metal as may be required, and for the ordinary
brazing operation.
The tubes are arranged with the projecting rib on the under side in their application
to cycle frames and also to the construction of hollow rims for cycle and other vehicle
wheels, thus affording additional strength without causing inconvenience or detracting
from the appearance of the machine or vehicle.
I do not limit the application of my invention to any particular form of tube,
but adapt it to the construction of tubes of varying sections, in all cases arranging
the over-lapping or abutting edges in the form of a projecting rib as hereinbefore
described.
Improvements relating to the Manufacture or
I, WILLIAM STARLEY, of St. John's Works, Coventry in the County of Warwick,
Cycle 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 steel

page_text: tubes, my object being to produce by a series of simple operations a strong ani
durable tube from sheet steel for cycle construction and for other purposes.
In the accompanying sheet of explanatory drawings to be hereinafter
referred to;-
Figure 1 is an elevation representing a short length of a completed tube constructed
in accordance with my invention.
Figures 2 to 5 inclusive are sectional views of tubes illustrating four forms of
my longitudinal rib joint.
In carrying my invention into effect I cut the tube strips to the required width
from sheet steel and roll the same through a series of rolls into the tubular shape.
During the rolling process I bend out each edge of the strip, preferably to a trough
shape and in such a manner that on the completion of the rolling operations such
edges shall be caused to overlap each other, as shown at Figure 2, and to form a
projecting rib as A, Figure 1, along the tube, thus strengthening the same and enabling
the edges to be readily and effectually brazed together.
I form the tube with the projecting rib to the finished shape preferably by drawing
the same through a suitable die, thus closing the edges on to each other, prior to
the operation of brazing them together.
I sometimes form a bead along one of the edges of the tube strip which is
embraced by the trough or groove formed in the opposite edge, as shown at
Figure 3. Or instead of the two edges overlapping each other as hereinbefore
described, I sometimes cause them to abut as shown at Figure 4, in some cases
employing a trough shaped cover strip B as shown at Figure 5.
I preferably form the tube to the completely finished shape without heating the
strip other than for annealing the metal as may be required, and for the ordinary
brazing operation.
The tubes are arranged with the projecting rib on the under side in their
application to cycle frames and also to the construction of hollow rims for cycle
and other vehicle wheels, thus affording additional strength without causing
inconvenience or detracting from the appearance of the machine or vehicle.
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 ;-
The improved sheet steel tubes having an outwardly projecting rib formed from
the tube strip substantially as described and as illustrated.
Dated this 25th day of November 1806
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.