Improvements in and connected with Rims and Tyres for the Wheels of Velocipedes, Motor Cars, and other Vehicles.
Year: 1897

page_text: Date of Application, 27th Jan., 1897-Accepted, 29th May, 1897
Improvements in and connected with Rims and Tyres for the
Wheels of Velocipedes, Motor Cars, and other Vehicles.
I JOHN MADIGAN 11 Furnival Street Holbern London E.C. in the County of
Middlesex Traveller 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 objects of this invention are to enable inflated or pneumatic tyres to be
readily attached to and detached from the rims of the wheels with which such
tyres are used and also to prevent such tyres from becoming detached from the
wheels when deflated.
Now according to this invention I form grooved channels in the rim of the wheel
and I form integral with or attached to the edges of the cover (or tube of single
tube or tubeless tyres) beadings or edgings of oval elliptical or other suitable
section the said beadings or edgings being preferably less elastic than the cover or
tube.
The edgings or beadings are preferably attached to the cover or tube in such
a manner as to project further beyond the cover on the outside than on the
inside.
And in order that my said invention may be fully understood I will proceed to
explain the same with reference to the accompanying sheets of drawings in
which.-
Fig. 1. represents cross section of a rim and tyre constructed according to this
invention.
Fig. 2. represents cross section of an alternative form of rim also constructed
according to this invention.
The same letters denote the same parts in all the figs.
A is the rim of the wheel H H the grooved channels above referred to D the
outer tyre or cover C the air tube EE the edges or flaps of the cover or tyre.
B B the thickened oval ends of the flaps KL the ledges or flanges of the grooved
channel H. S a spoke of the wheel. F a bulged portion of A hereinafter
mentioned. The tyre or cover D is fixed to the rim of the wheel by pressing
the thickened portion B edgewise through the space between the ledges K L into
the channel H.
The edge B which is shewn oval in section in the sketches at once tilts and takes
the position indicated in the drawings and rests upon the ledges K L being held in
position to a certain extent by falling into the curved space between F & L and
thus becomes locked and cannot be pulled out of the channels by any strain due to
the inflation of the tyre. When the air tube is inflated the tyre expands to its
normal shape and is checked from any further movement by reason of being held
or locked by the edge B which rests upon the flanges K & L as above described.
Fig. 1. shews this invention with the grooved channels upon the inside of the
rim of the wheel.
Fig. 2. shews a modification thereof with the channels upon the outside of the
rim of the wheel.
If the tyre is what is known as a "tubeless" tyre the strip of rubber y forming
the air chamber is attached to the cover in such a manner as to leave two flaps z z
which may either close with a butt or scarfed joint or the flaps may overlap as
shewn in dotted lines Fig. 1 when the tyre is inflated.

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. A rim for the wheels of vehicles A having a hollow grooved channel H on
each side of a central portion having undulations LE thereon the said undulations
and channels extending all round the said rim and adapted to receive the edges B
of a tyre cover all substantially as specified.
2. A cover for inflated tyres having an inextensible beading or edging attached
thereto the said beading or edging being oval or of other suitable shape in cross
section and attached excentrically to the edges of the cover substantially as
hereinbefore specified and for the purpose stated.
3. Rims for the wheels of vehicles velocipedes and the like having grooved
channels therein of the configuration shewn in the accompanying drawings.
4. In a "tubeless" pneumatic tyre for the wheels of vehicles the combination of
a rim and cover secured thereto as hereinbefore specified with flaps az adapted to
be folded over each other as shewn in dotted lines at Fig. 1 of the accompanying
drawings.
5. Rims and tyres for the wheels of velocipedes motor cars and other vehicles
constructed as shewn by the accompanying drawings.
Dated this 26th day of January 1897.
J. MADIGAN,
11, Furnival Street, Holborn, E.C.