Improvements in or relating to Velocipedes.
Year: 1890

page_text: Date of Application, 3rd June, 1890
Complete Specification Left, 9th Mar., 1891-Accepted, 11th Apr., 1891
PROVISIONAL SPECIFICATION.
Improvements in or relating to Velocipedes.
We, CHARLES MONTAGUE LINLEY and JOHN BIGGS, trading as Linley
and Biggs, Cycle Manufacturers, of 29, Clerkenwell Road, in the City and
County of London, do hereby declare the nature of this invention to be as
follows:-
Our invention relates to the manufacture of tubes for the framework of velo-
cipedes, and it consists in building up the tubes from lengths of sheet steel. By
this construction we are enabled to so dispose the metal as to obtain increased
strength where it is most required, thereby effecting a saving of weight as compared
with weldless drawn tube, strength for strength, as these tubes are drawn with an
equal thickness of metal all round.
In the modern velocipede the greatest length of tube required in one piece
seldom exceeds two feet, so that the construction of built up tubes is materially
facilitated.
We construct our improved tubes in the following manner- We take a strip of
sheet steel of the necessary gauge to give the desired strength, and by means of a
folding press, or its equivalent, we set back one edge, and then turn up a portion
of this set back. We then by means of a suitable rolling mill, or its equivalent,
roll the sheet into a cylindrical form, the free edge of the sheet fitting on
to the set back on the other edge of the sheet, the turned up part forming
a central web inside the tube. The seam or joint is then brazed with a hard
solder.
To give increased strength to the tube we sometimes double in the sheet to form
an internal web opposite to the web formed by the joint.
It will be seen that by means of the web or webs inside the tube it is stiffened or
strengthened in one direction, and as the strains to which the members of the frames
of cycles are subjected to, are invariably in one direction only, we are able to get
the necessary strength where required without having excessive strength i.e. weight,
in the other parts of the tube.
Dated this 3rd day of June 1890
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in or relating to Velocipedes.
WC,
CHARLES MONTAGUE LINLEY and Jous BIGGs, trading as Linley and
Biggs, Cycle Manufacturers, of 29, Clerkenwell Road, in the City and County of
London, 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 :-
Our invention relates to the manufacture of tubes specially adapted for the frame-
work of velocipedes, and it consists in building up the tubes from lengths of sheet
steel by forming a double set off" on one edge of the sheet, which after being
rolled forms a double scat for the other edge of the sheet and gives a double joint
to braze, and also forms an internal web, the objects being, decrease of first cost,
and increased strength.

page_text: By this construction we are enabled to so dispose the metal as to obtain increased
strength where it is most required, thereby effecting a saving of weight as compared
with weldless drawn tube, strength for strength, as these tubes are drawn with an
equal thickness of metal all round.
Tubes made according to our invention are specially adapted for the frames of
the modern velocipede because the greatest length of tube required in one piece
seldom exceeds two feet.
We construct our improved tubes in the manner illustrated by the accompanying
drawing in which Figures 1, 2, 3, and 4 show the method of construction in its
successive stages from the plain sheet of metal to the finished tube, and Figures 5, 6,
and 7 show modifications. We take a strip of sheet steel or other suitable metal
of the necessary gauge to give the desired strength (Figure 1.) and by means
of a folding press, or its equivalent, we set back one edge, as shown by
Figure 2, and then turn up a portion of this set off" as shown by Figure 3.
We then by means of a suitable rolling mill, or its equivalent, roll the sheet into
a cylindrical form as shown by Figure 4, the free edge of the sheet resting
on the two edges of the "set off" as illustrated, the "set "off" forming a longitu-
dinal central web of a U or V shape in transverse section inside the tube.
The seam or joint is then brazed at the two points and a with a hard solder.
It is immaterial what shape the "set off" takes so long as it forms two distinct
points of support for the free end of the sheet. Figures 4, 5, and 6 illustrate some
forms the "set off" may assume. In that shown by Figures 4 and 5 the free edge of
the sheet is chamfered to allow it to make a clean joint with the "set off," but in
that shown by Figure 6 the free edge of the sheet may be left square to enable it to
bed up against the edge of the set off" which is made more acute, the double
set off giving the two points of support.
ラ
To give increased strength to the tube we sometimes double in the sheet to form
an internal web opposite to the web formed by the joint as shown by Figure 7 of
the accompanying drawing.
The method we adopt in brazing up the joints of the tubes is to run a length of
brass wire through the small orifice formed by the "set off" and to place the borax
in one end of the other part of the bore of the tube. The tube is then placed in a
long furnace with the joint underneath, and as soon as it is sufficiently heated the
tube is tilted by raising one end which allows the borax to flow along the interior of
the tube, thus ensuring the formation of a perfect joint. To keep the joints closed
during the process of brazing and to ensure an even gauge for the tubes we
pass on to the rolled tube a series of washers which are stamped out to one
gauge.
It will be seen that by means of the U or V shaped web inside the tube it gives
two points for brazing thus making a double joint, the separate parts of which
support each other and so give the joint great strength. The double web also
strengthens the tube in one direction, and as the strains to which the members of the
frames of cycles are subjected to, are invariably in one direction only, we are able
to get the necessary strength where required without having excessive strength,
i.e., weight, in the other parts of the tube, while the two points of support and
brazing make a thoroughly reliable joint.
We are well aware that prior to the date of our invention tubes have been made
from sheet metal, and we therefore do not broadly claim such as our invention,
but
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is
1. The improved method of constructing tubes, specially adapted for the
framework of velocipedes, as herein set forth and illustrated by the accompanying
drawing.
2. Constructing tubes specially adapted for the framework of velocinedes

page_text: out of lengths of sheet steel shaped, fashioned, and rolled, so as to form a
double point of support and attachment at the joint, as and for the purpose set
forth.
3. In a tube built up out of a length of sheet metal, forming a longitudinal
internal web of a U, V, or other suitable transverse section affording the free edge
of the sheet two distinct points of support, thus giving two separate points for
brazing, as and for the purpose set forth.
Dated this 4th day of March 1891.
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicants.