Improvements in Pneumatic Tyres.
Year: 1893

page_text: Date claimed for Patent under Sect. 103 of Act,
being date of first Foreign Application (in 10th Dec., 1892
Belgium),
Date of Application (in United Kingdom), 10th July, 1893
Complete Specification Left, 10th July, 1893-Accepted, 21st Oct., 1893
Belgium),
Date of Application (in United Kingdom), 10th July, 1893
Complete Specification Left, 10th July, 1893-Accepted, 21st Oct., 1893
Improvements in Pneumatic Tyres.
I, OTTO LINDNER of 148 Rue de Merode Brussels in the Kingdom of Belgium,
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 :-
My invention relates to an improvement in the construction of the cover of that
type of pneumatic tyre in which the cover is held and secured to the wheel rim by
reason of its unstretchable edges engaging with the sides of the wheel rim on the
inflation of the air tube, and it consists in rendering the edges of the cover
unstretchable or circumferentially rigid by forming beads or enlargements on them
and enclosing the said beads or enlargements in a metallic case or shield, the object
being to render the edges of the cover unstretchable or circumferentially rigid in
a more perfect manner than is at present known.
I attain this end in the manner illustrated by the accompanying drawing, in
which :-
Figure is a view in transverse section of the cover of a pneumatic tyre
embodying my invention.
Figure 2 is a view in transverse section of the metallic case or shield, and
Figures 3 and 4 are views in transverse section of a pneumatic tyre embodying
my invention seated in a wheel rim.
Similar letters denote similar parts throughout the several views.
The cover of the tyre A is moulded in an arch-shape in cross section and it has
beads or enlargements a, a, formed on its edges. These beads or enlargements.
may be of any shape in cross section but preferably round. Each of the beads or
enlargements a, a, is enclosed in a metallic case or shield B, which is effected by
taking a hoop or ring of a gutter section, and after placing it over the beads or
enlargements, closing in the edges of the said hoop or ring by means of suitably
shaped rolls.
By this construction the edges of the cover are rendered unstretchable or
circumferentially rigid in a more effectual and reliable manner than by the
insertion of a metallic core or wire, or by the construction of the said beads or.
enlargements of hard rubber, vulcanite, or the like.
The air tube C is of the usual construction and is fitted with any suitable form
of valve for inflation and deflation.
The wheel rim D may be of the usual crescent shape in cross section as shown
by Figure 3 or of the shape shown by Figure 4.
I am aware that at the date of my invention it was not broadly new and novel
to make the edges of the cover of a pneumatic tyre unstretchable or circum-
ferentially rigid, and I do not therefore claim such as my invention, but having

page_text: 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. The improvement in pneumatic tyres substantially as herein before described
and illustrated by the accompanying drawing.
2. Rendering the divided edges of the cover of a pneumatic tyre unstretchable
or circumferentially rigid, by forming beads or enlargements on the edges of the
cover, and enclosing the said beads or enlargements in metallic cases or shields, as
set forth.
3. In a pneumatic tyred wheel the combination with the wheel rim, of a cover
having beads or enlargements on its divided edges, of metallic cases or shields
adapted to fit over and enclose the beads or enlargements on the edges of the cover,
and of an air tube for inflating the tyre, as set forth.
Dated this 10th day of July 1893
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.