Improvements in Wheels for Velocipedes and other Road Vehicles, and in Pneumatic Tyres for such Wheels.
Year: 1893

page_text: Date of Application, 18th Oct. 1893
Complete Specification Left, 19th Jan., 1894-Accepted, 25th May, 1894
PROVISIONAL SPECIFICATION.
Improvements in Wheels for Velocipedes and other Road Vehicles,
and in Pneumatic Tyres for such Wheels.
I, JOSEPH THOMAS FENWICK, 68, West Street, Gateshead, Durham, Engineer,
do hereby declare the nature of this invention to be as follows:-
According to this invention the rim of each wheel is grooved or recessed, and
has its lateral flanges either corrugated or perforated or corrugated and perforated
and bent upwards and inwards so as to form a dovetailed groove or recess, wherein
a pneumatic tyre consisting of a flat piece of rubber, or other suitable material, of
any convenient size and substance is fitted by passing the edges thereof under such
flanges. When so fitted the edges of the tyre are firmly gripped and held in
position by the flanges, while the central portion of the tyre is pressed outwards in
a convex form thus forming an air chamber between it and the rim into which
chamber the air passes. A suitable regulating chamber may be fitted to the rim of
the wheel in any convenient manner in order to regulate the air pressure within
such chamber.
Dated this 18th dow of October 1892
ELT & Co.,
33, Southampton Buildings, London, Agents for Applicant.
Improvements in Wheels for Velocipedes and other Road Vehicles,
and in Pneumatic Tyres for such Wheels.
I, JOSEPH THOMAS FENWICK of 68 West Street, Gateshead, in the County of
Durham, 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 :-
The object of this invention is to produce a pneumatic tyre suitable_for_the
wheels of cycles and other road vehicles that can be fitted, unfitted, and refitted to
the wheel with the utmost facility, that is not liable to injury from puncture, and
which combines the essential advantages of great simplicity of construction and
economy, with increased durability and great effectiveness.
To effect this the rim of each wheel is grooved or recessed, and has its lateral
flanges corrugated, and bent upwards and inwards, so as to form a dovetailed groove
or recess, wherein a flexible tyre consisting of a flat piece of rubber, or other
suitable flexible material, of any convenient size and substance is fitted, by passing
the lateral edges thereof under such corrugated dovetailed flanges. When so fitted
the edges of the tyre are firmly gripped and held in position by the corrugated
dovetailed flanges, while the central portion of the tyre is pressed outwarda in a
curved form as shewn in Figures 2 and 3 of the accompanying drawings, thus
forming an air chamber between it and the rim, into which chamber the air passes.
If desired a suitable regulating valve may be fitted to the rim of the wheel in any
convenient and well known manner, in order to regulate the air pressure within
such chamber, but such regulating valve is not indispensable.

page_text: DRAWINGS.
Figure 1 is a plan view of a section of the rim and tyre of a cycle wheel made
and fitted according to my invention. Figure 2 is a side elevation of such section,
and Figure 3 a transverse section thereof.
Similar letters indicate corresponding parts in all the figures.
a, is the grooved rim-b, the corrugated dovetailed lateral flanges thereof―c, the
corrugations therein-d, the flexible tyre-e, the air chamber.
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. In combination with the rims of the wheels of cycles and of other road vehicles,
a groove having corrugated, lateral flanges, which are bent upwards and inwards
in a dovetail form, all substantially as hereinbefore described and shewn.
2. In the wheels of cycles and other road vehicles, the combination of a grooved
rim having corrugated dovetailed lateral flanges with a rubber or other flexible
tyre, such rim and tyre being respectively made, arranged, combined and fitted all
substantially as hereinbefore described and shewn.
Dated this 10th dow of Ton 1904
ELT & Co.,
33, Southampton Buildings, London, W.C., Agents for Applicant.