Improvements in and connected with Pneumatic Tires for Cycle and other Wheels and in the Means for Securing them to the Rims.
Year: 1893

page_text: COMPLETE SPECIFICATION.
Improvements in and connected with Pneumatic Tires for Cycle and
other Wheels and in the Means for Securing them to the Rims.
I, RICHARD HENRY DIX of 23 Hendon Road, Sunderland in the County of
Durham, Grocer, 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 improvements in and connected with pneumatic tires for
cycle and other wheels and in the means for securing them to the rims.
I will fully describe my invention with reference to the accompanying drawings
in which
Figure 1 shows in side elevation part of a pneumatic tire secured in a rim in
accordance with my invention.
Figure 2 showing a cross-section on the line x. y. in Figure 1.
Figure 3 shows an underside view of the rim and
Figure 4 an upper side plan view of the tire and in the following description like
marks of reference indicate like parts.
Referring to the drawings it will be observed that the rim a of the cycle wheel
has apertures a' formed in it such apertures being spaced at suitable distances apart
and by preference alternately on opposite sides of the rim. In the drawings the
apertures a¹ are shown of an oblong form and preferably on three sides of such
oblong apertures I form a slightly raised flange or projection 2 the fourth side
remaining unflanged or flush with the surface of the rim.
The tire itself, as shown in Fig. 2, consists of the usual air inflation tube 3 and a
rubber trod-piece 4 mounted for example on a canvas lining 5. It will be observed
that the trod-piece 4 is not a perfect tube but that it has an open under-surface
through or by which the inflation tube 3 can be arranged in its position. Formed
in one with or connected by solution or otherwise to the external under-surface of
the trod-piece 4 are certain more or less triangularly-shaped raised rubber surfaces
or projections 6. These are arranged as above described with reference to the
apertures a at suitable distances apart and by preference alternately on opposite
sides of the rim. Thus to secure the tire thus formed to the rim the inflation tube
is first placed within the trod-piece and the latter is then placed on the rim and the
several projections 6 thereon are fitted into the several apertures a' in the rim.
The inflation tube must now be inflated and this has the effect of drawing or
squeezing the rubber projections 6 tightly against the longer flanges 2 of the
apertures a' by which special device the tire is held securely on the rim and should
the tire become punctured or should it be necessary to remove the tire by releasing
the contained air within the inflation tube in the ordinary manner the projections 6
or any of them can at once be easily removed from their positions within the
apertures aforesaid.
The apertures a¹ and the projections 6 need not be of the precise shape shown in
the drawings; the precise shape may vary but that illustrated will be found to give
very satisfactory results. The terminal or smaller flanges 2 serve to prevent any
"creeping" of the tire round the rim and to secure the projections 6 against being
cut by the edge of the rim when there may be any tendency to creep.
To prevent lateral slipping of the wheel when running I form in one with or
otherwise secure to the trod of the tire V-shaped india rubber ridges 7 as shown in
the figures. These also tend to divert any small obstacles that may be lying on
the road or track to the sides and in this manner to save the tire from being cut
or punctured.

page_text: 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. The improved means for attaching or securing pneumatic rubber tires to the
rims of cycle and other wheels and for detaching the same when required consisting
in the provision on the under and opposite sides of the tire or trod-piece of raised
rubber projections adapted to fit into corresponding apertures arranged in the rim
of the wheel so that when the inner inflation tube is inflated the said projections
shall become squeezed or nipped in or against the apertures aforesaid substantially
as and for the purposes herein before set forth.
2. The combination with a tire having projections 6 adapted to fit into apertures a¹
in the rim as set forth of V-shaped ridges 7 to prevent side-slipping and puncturing
of the tire substantially as herein set forth.
Dated this 2nd day of June 1893.
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.