Improvements in Rims and Tyres of Cycle or other Wheels.
Year: 1890

page_text: Date of Application, 27th Sept., 1890
Complete Specification Left, 23rd June, 1891-Accepted, 25th July, 1891
PROVISIONAL SPECIFICATION.
Improvements in Rims and Tyres of Cycle or other Wheels.
I HENRY KESTERTON Coventry Engineer do hereby declare the nature of this
invention to be as follows :-
A projection is provided on one side of the elastic tyre which projection is formed
into a dovetailed shaped flange or rib which fits into a similarly shaped recess inside
the rim.
The bottom edges of the rim are turned inwards and shaped to rest on the tyre
without cutting it and to form also a dovetailed recess inside the rim.
The tyre is fixed by springing the elastic flange or rib on the tyre into the recess
inside the rim when the former is dovetailed into the latter immovably.
Dated this 26th day of September 1890.
HENRY KESTERTON.
COMPLETE SPECIFICATION.
Improvements in Rims and Tyres of Cycle or other Wheels.
I, HENRY KESTERTON, of Union Street, Coventry, Engineer, 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:-
A projection is provided on one side of the elastic tyre which projection is
formed into a dovetailed shaped flange or rib which fits into a similarly shaped
recess inside the rim.
The bottom edges of the rim are turned inwards and shaped to rest on the tyre
without cutting it and to form also a dovetailed recess inside the rim.
The tyre is fixed by springing the elastic flange or rib on the tyre into the recess
inside the rim when the former is dovetailed into the latter immovably.
In order that my invention may be fully understood and readily carried into
effect I will proceed to describe the drawings annexed.
DESCRIPTION OF THE DRAWINGS.
Figures 1 to 4 show transverse sections of the rim in its several stages of
manufacture.
Figure 5 illustrates the method of bending the rim to the circular form.
Figure 6 illustrates the method of joining the ends.
Figure 7 is a transverse section of the vulcanised india rubber tyre; and
Figure 8 is a transverse section of the completed rim and tyre.
Figure 9 shows a modification; and illustrates the application of my invention to
a pneumatic or hollow tyre.
I make the rim or felloe by drawing a flat strip of steel-Figure 1-through a
die which produces the shape Figure 2-then through a die which produces the
shape Figure 3-then through a final die which produces the shape Figure 4. The
strip is kept straight up to this point. I now shape it into the necessary circle by
passing it through rolls-Figure 5 shaped on their faces to suit the section produced
by the drawing.
The centre roll is adjustable. When the rim has been brought to the circular
form the two ends of the circle are united as shewn at Figure 6 by pieces of wire
fitted into the small tubes formed on the edges of the strip, when the two ends of
Pri 621

page_text: the strip are brought together the wires pass about one inch into each and the two
ends of the strip and the wires are fixed rigidly as placed by brazing.
The rubber tyre is made in circular moulds in which a special groove is cut to
produce the flange on the inside of the tyre by which it is fastened to the rim, in
some cases I prefer to make the holding flange of a harder quality of rubber than
the rest of the tyre; this is done by arranging the different qualities of the rubber
in the moulds accordingly.
The rim is left after the final drawing sufficiently wide open to admit the tyre
flange readily and when the latter is placed uniformly round the rim the latter is
closed firmly onto the flange by a suitable pair of light rolls acting on the tube
edges of the rim.
The rolls press the tubular edges or flanges inwards so as to cause them to
embed themselves in the grooves or cavities in the tyre on either side of the
tyre flange which the tubular edges or flanges of the rim are thus made to nip
firmly.
In Figure 9 the tyre is hollow and consists of a tube charged with air, and a
jacket surrounding the tube. The jacket envelopes the air tube and its two edges
come together forming the dovetail rib or flange which is received into the trough
or recess of the rim. The exterior form of the tyre in Figure 9 is substantially
the same as that shown in the Figures 7 and 8 but the dimensions are somewhat
larger as is desirable when the tyre is hollow.
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
A rim and tyre, the former consisting of a single strip of steel made to a trough
like form with tubular edges or flanges turned inwards and then bent to a circle of
a size suitable for the wheel and the tyre made of india rubber and with a dovetail
rib or flange entering the trough or recess of the rim and fixed by bending the rim
so as to cause its tubular edges to approach each other and to embed themselves
in grooves formed in the tyre to receive them and to nip the flange of the tyre
firmly between them.
Deted this 26th day of May 1891