An Improved Tube suitable for Cycle Frames and such like and other purposes, and in the Manufacture of the same.
Year: 1896

page_text: Date of Application, 21st Feb., 1896
Complete Specification Left, 18th Sept., 1896-Accepted, 21st Nov., 1896
PROVISIONAL SPECIFICATION.
An Improved Tube suitable for Cycle Frames and such like and
other purposes, and in the Manufacture of the same.
I, CHARLES HENRY. BRAMPTON of the Firm of F. Brampton & Co. of
14 Oliver Street Nechells, Birmingham in the County of Warwick Manufacturers
do hereby declare the nature of my said invention to be as follows:-
My invention has for its object an improved tube or construction suitable for
cycle frames and such like and other purposes and in the manufacture of the same,
and which are easily manufactured and are remarkably strong.
My new tube construction or member is made from sheet metal such for instance
as Siemens steel or strips of any suitable kind of metal or material or rolled strips
of a suitable width may be used for the purpose. The strips whether so rolled or
cut from sheets have one edge turned upwards and the other edge turned down-
wards. Then a straight flat portion is reserved at the centre about the width of
the internal diameter of the tube. From this line one edge is curved or turned
backwards to form a semicircle and the other forward to form a semicircle when
the two bent edges will be found to abut against the straight flat centre web piece
where they are secured by soldering, brazing cement, or in any other convenient
manner. By these means I obtain a tube with an entire central division
strengthened at each junction or side by a stiffening piece which greatly
strengthens the tube without seriously interfering with the external configuration
whether round or eliptical.
Dated this 20th day of February 1896.
GEORGE BARKER,
77 Colmore Row, Birmingham, Agent for Applicant.
COMPLETE SPECIFICATION.
An Improved Tube suitable for Cycle Frames and such like and
other purposes, and in the Manufacture of the same.
1, CHARLES HENRY BRAMPTON of the Firm of F. Brampton Bros, of
14 Oliver Street, Nechells, Birmingham in the County of Warwick, Manu-
facturers, do hereby declare the nature of my said 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 has for its object an improved tube or construction suitable for
cycle frames and such like and other purposes and in the manufacture of the same
which are easily manufactured and are remarkably strong.
My new tube, construction or member, is made from sheet metal, such for
instance, as Siemen's steel or strips of any kind of suitable metal or material or
rolled strips of a suitable width may be used for the purpose. The strips whether
rolled or cut from sheets have one edge turned upwards and the other edge turned
downwards. Then a straight flat portion is reserved at the centre about the width
of the internal diameter of the tube. From this line one edge is curved or turned
backwards to form a semicircle and the other forwards to form a semicircle when
ID 013

page_text: the two bent edges will be found to abut against the straight flat centre web piece
where they are secured by soldering, brazing cement or in any other convenient
manner. By these means I obtain a tube with an entire central division
strengthened at each junction or side by a stiffening piece which greatly
strengthens the tube without seriously interfering with the external configuration
whether round or elliptical.
In order that my invention may be clearly understood and more easily carried
into practical effect I have appended hereunto a sheet of drawings illustrating
some examples of tubes or double chambered members which may be used in the
construction of vehicle and other frames and for other useful purposes and which
will enable others to apply the same as required in practise.
Figure 1 is a cross section of a divided round tube A made according to my
invention from one strip of metal.
Figure 2 is a cross section of a divided eliptical tube made according to my
invention the tube having in the example shown the division a' across the short
diameter which I prefer though the division may cross the large diameter if so
desired.
Figure 3 is a cross section of another round divided tube with the division
gathered up at each side to make a stronger junction.
Figure 4 is a modification of a round divided tube with the division a' so formed
that the tube may be bent into various shapes after it is made.
Figure 5 is another modification of a possible shape either upou first formation
or by a squeezing, rolling or drawing process after its formation.
Figure 6 shows a section in shape like the figure 8 which may be so formed on
account of the flexible condition of the division a' when bent in the first place as
seen at Figures 4 and 5.
My new tube A which in all cases has a division a' across its centre or one of its
centres is manufactured from one strip of metal the simplest form being shown at
Figure 1 which is round, and Figure 2 which is elliptical. The strip is bent at a
leaving the flap a and then again at a thence passing across and forming the
division a' and then turning at a³ curving around to a and terminating with the
flap a. This explanation so far applies to both Figures 1 and 2. The flaps are
now soldered brazed or cemented or otherwise fastened to the web or division a
which completes the member or double chambered tube A. The junction may
however be effected in a such like locking fashion as is shown by Fig. 3 where the
bends a and a of the web or division a forms channels for the reception of the
flaps as and a where they may be soldered, cemented, or otherwise fastened.
Sometimes I may form the web a' with curves as seen at Figures 4 and 5 so that
when it is required to bend the tube. the web will give and either allow it to be
bent like an elbow or to a curve or curves or to be crushed inwards into various
shapes such for instance as that shown at Figure 6 which is suitable for many
purposes where a girder section is required. It will be clearly understood that the
shapes herein shown are simply examples of what may be done but the configura-
tion in section may be greatly varied without departing from the principle of my
invention.
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 :-
The new or important tube construction A formed from strips of metal or cut
from sheets and bent, drawn, or worked round into such like sections as those
shown upon the accompanying drawings and substantially as herein set forth.
Dated this 17th day of September 1896.
GEORGE BARKER,
77 Colmore, Row, Birmingham, Agent.