Improvements relating to Pneumatic Tyres for Velocipedes.
Year: 1898

page_text: Date of Application, 27th Jan., 1898-Accepted, 12th Mar., 1898
COMPLETE SPECIFICATION.
Improvements relating to Pneumatic Tyres for Velocipedes.
I, JAMES BURBRIDGE, of Messrs. W. Warne and Co. Ltd., of The India Rubber
Works, Tottenham, in the County of Middlesex, India Rubber 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:-
The object of this invention is to produce an efficient tyre for velocipedes.
In carrying out my invention, I provide a rim of special section, and I secure
thereto a cover having beaded edges, by means of metal strips which hold the cover
tightly against the rim. These strips I cover by bands of rubber, wedge-shaped in
cross section, which serve to prevent rolling, and, at the same time, add to the
resilience of the tyre. A pneumatic tube is contained within the cover, and means
are provided for preventing the creeping and nipping of the tube between the cover
and the rim. I may also provide a removable tread to the cover, if desired.
In the accompanying drawing,
Figure 1 is a perspective view of the tyre, the end being in section, showing the
mode of attaching the cover to the rim, and the section of the rim.
Figure 2 is a similar view, showing the tyre complete, and
Figure 3 shows, in similar view, a slight modification.
A is the rim, which consists of a flat portion with semi-circular edges, the plane
of the diameter of which is preferably set at a slight angle to the flat portion. B is
the cover, which is made in any convenient manner with beaded edges. The beads
are intended to fit into the semi-circular recesses of the rim, in which they are
secured by the metal strips C.
The ends of the strips are secured together by bolts and nuts, or in any other
convenient manner, so as to produce pressure on the edges of the cover, to hold them
firmly in position.
D are bands or rings of rubber, wedge-shaped in cross section, which are intended
to overlie the strips C, and fill up the spaces between the cover and the strips, to
prevent rolling, as well as to give great resilience to the tyre.
E represents the pneumatic tube, which will be inflated in the usual manner.
To prevent the tube E creeping between the rim A and cover B, I fill in the space
between the bends of the cover with pieces, G, of any suitable material, which may
be attached to the cover B. I thus enclose the tube E with an entire tube or cover.
As a modification, I may make the cover B comparatively thin, and I provide a
removable tread B'. I form the wedges D so that they will extend to, and underlie,
the edges of the tread B¹, as shown in Figure 3.
The tread B¹ will be cemented to the cover B, and also to the wedges.
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 pneumatic tyre for velocipedes constructed, arranged, and operating as herein
shewn and described.

page_text: 2. In a tyre for velocipedes, the combination with a flat rim, having semi circular
edges or sides, and a cover held to the rim by metal strips, of wedge-shaped rubber
bands, as and for the purpose set forth.
3. In a tyre for velocipedes, the combination with a rim, a cover held thereto by
metal strips, and a pneumatic tube, of filling pieces, as G, between the folds of the
edges of the cover, as and for the purpose set forth.