Improvements relating to Tubes for Cycle Construction and like purposes.
Year: 1897

page_text: Date of Application, 13th Mar., 1897
Complete Specification Left, 10th Dec., 1897-Accepted, 5th Feb., 1898
PROVISIONAL SPECIFICATION.
Improvements relating to Tubes for Cycle Construction and like
purposes.
I, WILLIAM WILKINSON, of Wordsworth House, Highfield Road, Saltley, in
the City of Birmingham, Metal Wire and Tube Manufacturer, do hereby declare
the nature of this invention to be as follows:-
This Invention relates to the manner in which I strengthen or stiffen tubes
of aluminium or white metal composed chiefly of aluminium, and adapt them for
cycle construction and for like purposes.
In the application of my invention I insert within each tube a core of elm or
other suitable wood, extending the whole length of the tube. I then draw the
tube and its core together through a die of such dimensions as to compress both
the tube and the core, thus consolidating each and effectually securing them to-
gether. In this manner I strengthen or stiffen the light metallic tube without
unduly adding to its weight.
In the construction of cycle frames and the like with my stiffened tubes, I pre-
ferably secure the ends of the tubes to the lugs or brackets by means of jointing
pins or pegs passing through the lug or bracket and also through the tube with
its wood core, and I employ such a method of jointing either with or without brazing
or soldering.
MARKS & CLERK.
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant.
Improvements relating to Tubes for Cycle Construction and like
Purposes.
I, WILLIAM WILKINSON, of Wordsworth House, Highfield Road, Saltley, in
the City of Birmingham, Metal Wire and Tube 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 relates to the manner in which I strengthen or stiffen tubes
of aluminium and other metals, and adapt them for cycle construction and for like
nurposes.

page_text: In the application of my invention I insert within each tube a core of elm or
cther suitable wood, extending the whole length of the tube, or in the case of soft
metals beyond the same. I then draw the tube and its core together through
a die of such dimensions as to compress both the tube and the core, and in the
case of a soft metal tube to elongate the latter to the full length of the core, thus
consolidating each and effectually securing them together. In this manner I
strengthen or stiffen the light metallic tube without unduly adding to its weight.
In the construction of cycle frames and the like with my stiffened tubes, I pre-
ferably secure the ends of the tubes to the lugs or brackets by means of jointing
pins or pegs passing through the lug or bracket and also through the tube with
its wood core, and I employ such a method of jointing either with or without brazing
or soldering.
In the two accompanying sheets of explanatory drawings
Figure 1 on Sheet 1 is a sectional end elevation and Figure 2 a sectional side
elevation of a cycle bottom bracket with wood core aluminium frame tubes
jointed thereto.
Figure 3 on Sheet 2 is a sectional elevation and Figure 4 a plan showing the
arrangement of the steering head socket or ball head of a cycle frame con-
structed from wood core tubes. The views on Sheet 2 Figures 3 and 4 are drawn
to a rather larger scale than those on Sheet 1.
Referring to Figures 1 and 2 the bottom bracket A is formed from a length
of aluminium tube having a wood core such as hereinbefore described. I drill
or form an aperture within the bracket for the reception of the seat pillar or
tube B, and at the required angle thereto I drill another aperture in the bracket,
which passes right through the seat tube or pillar B for the reception of the bottom
tube C. In like manner the back stay tubes D) are inserted within suitable aper-
tures formed in the bottom bracket. The central tube E inserted within the
bracket passes right through the two back stay tubes D and also the tubes Band C
as illustrated, and the ends of such central tube are secured to the steel socket
pieces F which receive the ball bearing cups. Each of the tubes is forced tightly
into the required position in the wood core bottom bracket A, but to further secure
the parts together I employ bolts, pins, or rivets as G with end plates H.
Referring to Figures 3 and 4 I preferably employ for the steering head socket
or ball head an aluminium tube J of the section shown which is drawn with a
wood core as with the tubes hereinbefore described. The steering tube is carried
through the central aluminium tube K which is fitted in an aperture which
passes right through the top and bottom tubes as illustrated.
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:
1. The strengthening or stiffening of aluminium or other metal tubes substan-
tially as described.
2. The use of aluminium or other tubes having wood cores in the construction
of cycle frames and for like purposes, substantially as described.
3. The jointing or connection of wood core aluminium or other tubes in the con-
struction of cycle frames, substantially as described and as illustrated.
Dated this 9th day of December
100%
COCI 1001
MARKS & CLERK.
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant.