Improvements in the Manufacture of Rims for Cycle and other such Wheels.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Rims for Cycle and other
such Wheels.
We, SAMUEL WALKER, of "Robin Hood" Hall Green, Warwickshire, and
SIDNEY STUART WALKER, of "Woodside," Knowle, in the County of Warwick,
Mechanical Engineers, do hereby declare the nature of this invention to be as
follows:
-
Our invention has for its object improvements in the manufacture of rims for
cycle and other such wheels by which we are enabled to produce a jointless
rim in a cheap and economical manner.
In carrying our invention into effect we take a thin strip of iron, steel, or
other suitable metal which in cross section is thicker in the centre than at the
edges and the ends of the strip may be sloped away to the same inclination as
the side faces. This strip is slit through along the whole length of the ridge
leaving the ends intact for a distance about equal to the width of one side after
which it is opened out by pressure or drifting in such a manner that the thickened
edges of the inner or slotted part are turned in one direction to form the one
edge of the rim and the outside or thinner edge turns in the reverse direction
to form the other edge the opened strip at this stage taking the form of a section
of an irregular cone the edge of the smallest diameter being the thicker one.
I then place this irregular cone between the rolls of an ordinary rolling machine
and roll the rim to the required section and size the thickened edge being thus
reduced in the enlargement of that edge of the cone which was of the smallest
diameter.
Improvements in the Manufacture of Kims for Cycle and other
such Wheels.
We, SAMUEL WALKER, of Robinhood Hall Green, and SIDNEY STUART WALKER,
of Woodside, Knowle, both in the County of Warwick, Mechanical Engineers, do
hereby declare the nature of this invention and in what manner the same is
Гр.. 21

page_text: to be performed, to be particularly described and ascertained in and by the follow-
ing statement;
Our invention has for its object improvements in the manufacture of rims for
cycle and other such wheels by which we are able to produce a jointless rim
in a cheap and economical manner without any waste of material.
We take a thin strip of iron steel or other suitable metal which in cross sec-
tion is thicker in the centre than at the edges and the ends of the strip may be
sloped away to the same inclination as the side faces.
This strip is slit through along the whole length of the ridge leaving the ends
intact for a distance about equal to the width of one side after which it is opened
out by pressure or drifting in such a manner that the thickened edges of the
inner or slotted part turn in one direction to form the one edge of the rim and
the outside or thinner edge turns in the reverse direction to form the other edge
the opened strip at this stage taking the form of a section of an irregular cone the
edge of the smallest diameter being the thicker one. We then place this
irregular cone between the rolls of an ordinary tyre rolling machine and roll
the rim to the required size and section the thickened edge being thus reduced in
the enlargement of that edge of the cone which was of the smallest diameter.
In order that our invention may be clearly understood and more easily carried
into practise we have appended hereto a double sized sheet of drawings upon
which we have fully illustrated the nature of our said improvements together
with the mode of carrying the same into effect.
Figure 1 is a view of the strip from which the rim is formed.
Figure 2 is an enlarged section through same on the 1-2.
Figure 3 is a view of the strip after being slit.
Figure 4 is an enlarged section through same on the line 3-4.
Figure 5 is a view of the strip after being drifted or pressed open.
Figure 6 is a diagram elevation of the rolls shewing the rim in section while
being rolled.
Figure 7 is a diagram section through the rolls shewing the rim in elevation
while being rolled.
Figure 8 is a section through the rim when rolled flat.
In carrying our invention into effect we take a thin strip of iron steel or other
suitable metal such as A which in cross section is thicker at the centre a' than
the edges a³ while the ends a³ may be sloped away likewise although this is not
essential.
This strip A is slit through at its centre at along the whole length of the ridge
but leaving the ends a³ intact after which it is opened out by drifting or pressure
in such a manner that the thickened edges a of the inner part turn in one
direction to form the one edge of the rim while the outside or thinner edge a³
turns in the reverse direction to form the other edge the opened strip at this
stage taking the form of an irregular cone as shewn by Figure 5 the edge a³ of
the smaller diameter being the thicker one.
We then place this irregular cone between the rolls B of an ordinary tyre
rolling machine whereby the thickened edge a is reduced in thickness and
the diameter of that edge enlarged until both edges are the same diameter and
thickness as shewn by Figure 8 upon which the rim may be rolled to the desired
section to suit the purpose for which it may be required.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
1st The improvements in the manufacture of rims for cycle and other such
wheels substantially as herein set forth and illustrated upon the accompanying
drawings.
2nd In the manufacture of rims for cycle and other such wheels the metal

page_text: strip A thickened and slit at or near the centre substantially as and for the
purpose herein set forth and illustrated upon the accompany drawings.
Dated this 27th day of May 1898.
LEWIS WM. GOOLD,
Agent for Applicants, 5, Corporation Street, Birmingham.