Improvements in Tyres for Wheels.
Year: 1899

page_text: Date of Application, 14th Aug., 1899-Accepted, 30th Sept., 1899
COMPLETE SPECIFICATION.
Improvements in Tyres for Wheels.
I, HERBERT AKROYD STUART, of "Akroydon," Kings Road, Reading, Berks,
England, but temporarily residing at the Grand Hotel, Spring Street, Melbourne,
in the Colony of Victoria, Mechanical 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:-
This invention relates to tyres for wheels, and more particularly to the means
used for securing such tyres in position upon the rims of wheels of road and
other vehicles.
Hitherto it has been usual to construct these tyres of metal which was shrunk
or pressed onto the rim and then secured by bolts passing through the tyre
and rim.
It has been found, however, in practice, that this method of securing tyres is
not satisfactory, because after a while they become loose and are liable to skid
or slip, and the screws, nails, bolts or their equivalents are a source of weakness
both to the tyres and to the rims.
The essential feature of this invention consists in constructing tyres with
ribs, webs or other projections on their inner surfaces so that when they are
pressed onto the rim said ribs or projections will be embedded or partially cm-
bedded within said rim and will thus serve to retain the tyres in position.
In order that this invention may be readily understood reference is made to
the accompanying drawings, in which,-
Figure 1 is a sectional perspective view showing part of a tyre constructed in
accordance with this invention, whilst
Figure 2 is a transverse section through said tyre as well as through the rim
of a wheel upon which it has been pressed.
Figures 3 and 4 illustrate slight modifications of the invention.
Similar letters of reference indicate corresponding parts in all the figures.
In the construction illustrated in Figure 1 the tyre A is shown as formed with
three longitudinal V-shaped ribs or webs B extending around on its inner surface.
These ribs are so arranged that when the tyre has been pressed on to the rim C
by hydraulic or other pressure they will be embedded in the rim as illustrated
in Figure 2 and will thus be securely held in position.
These ribs may be arranged angularly so as to form a dovetail when in position
as illustrated in Figure 3. By this means the wheel is kept true and the
sections of the rim are more firmly held in position.
Instead of having continuous ribs on the inner sides of the tyres they may
be made with projections at intervals as illustrated in Figure 4.
Tyres constructed in accordance with my invention may be made of any suitable
material or composition.

page_text: 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. A tyre for wheels having ribs or webs (as B) on its inner surface substan-
tially as and for the purposes herein described and explained and as illustrated in
Figures 1 and 2 of the accompanying drawings.
2. A tyre for wheels having angularly arranged ribs or projections on its inner
surface substantially as and for the purposes herein described and explained
and as illustrated in Figure 3 of the accompanying drawings.
3. A tyre for wheels having projections at intervals on its inner surface sub-
stantially as and for the purposes herein described and explained, and as illus-
trated in Figure 4 of the accompanying drawings.
4. The manufacture and use of tyres for wheels having ribs or projections on
their inner surfaces substantially in the manner, and for the purpose described.
Dated this Eleventh day of July One thousand eight hundred and ninety-
nine
HERBERT AKROYD STUART.
G. F. Redfern & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.