Improvements in the Manufacture of Rims for Cycle and other Wheels.
Year: 1892

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Rims for Cycle and other
Wheels.
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 :-
This invention relates to an improved method of manufacturing rims for cycle
and other wheels, and consists in adapting the invention described in the Specifica-
tion of Patent No. 10149 of 1891, granted to me, for this purpose.
This Specification describes a method of manufacturing metal tubes from sheet
metal, a strip of metal being taken and the edges bent over, forming a U shaped
channel. The strip is then bent into the form of a split tube. The edges are
connected together by means of a second strip of metal, with the edges bent over,
so as to engage with the U shaped channels in the split tube. This strip is placed
over the edges of the split tube, and a mandril of the size of the finished tube is
introduced into one end of the shell intended to form the tube, which is then drawn
through a die or draw plate, closing up the channels so as to form a strong
consolidated joint, having a projecting rib throughout the entire length of the tube.
According to this invention, a tube formed in the manner described is passed
through a die or draw plate attached to an ordinary draw bench, which produces
the desired sectional form for the rim. The spokes are attached to the thick part
or rib above mentioned, which is situated at the inner side of the rim, by screwing
or any other well known means. This rim is more especially applicable to
pneumatic-tyred cycles.
In order that the invention may be more clearly understood, reference is had to
the accompanying sheet of drawings, in which Fig. 1 is a cross section of the split
tube, before it is connected by the bent strip shown in Fig. 2. Fig. 3 is a section
of the completed tube and Figs. 4 and 5 of the rim, Fig. 5 showing a spoke screwed
into the rib, Figs. 6, 7 and 8 showing a modified form of tube and rim.
A is the main part of the tube having the bent over edges A', forming channels
on either side of the division. Into these channels fit the two sides of the
connecting piece B, shown separately in Fig. 2, the parts being connected as
described.
The tube is then formed into the hollow rim shown in Fig. 4, a rib C formed by
the parts A and B, extending all around the rim internally, the spoke D being
attached to this rib.
According to the modification shown in Figs. 6, 7 and 8, the tube and rim are
formed in a similar manner, but with the channelled part and connecting piece
external to the tube, instead of internal.
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) A rim for cycle and other wheels, made from a strip of metal A, bent into
the form of a split tube with bent over edges A', connected by a second strip B,
the tube so constructed being passed through a die or draw plate, causing it to
take the form of a hollow rim with a rib at its under side to which the spokes
are attached.
(2) A hollow rim formed as above described, with rib C to which the spokes
are attached, extending internally along its whole length, substantially as described
and shown in Figs. 4 and 5 of the drawings.

page_text: (3) A hollow.rim formed as above described, with rib C, to which the spokes
are attached, extending externally along its whole length, substantially as described
and illustrated in Figures 7 and 8 of the drawings annexed.
Dated this 5th day of November 1892.
GEO. H. RAYNER,
37, Chancery Lane, London, W.C., Agent for the Applicant.