Improvements in or connected with Pneumatic Tyres.
Year: 1894

page_text: Date of Application, 5th Dec., 1894
Complete Specification Left, 5th Sept., 1895-Accepted, 5th Oct., 1895
PROVISIONAL SPECIFICATION.
Improvements in or connected with Pneumatic Tyres.
We, WILLIAM STELFOX, of Lorne Street, Moss Side, Manchester, in the
County of Lancaster, Tin Plate Worker, and JAMES WEDDERBURN OGILVY
WALKER, of Oxford Drive, Kelvin Side, Glasgow, in the County of Lanark,
Foreman Rubber Worker, do hereby declare the nature of this invention to be as
follows:-
This invention is designed to provide a cover for pneumatic tyres which will
reduce the vibration and also prevent the slipping at present experienced on
muddy roads.
It consists essentially in constructing the cover with one or more slots or
grooves formed on the inner surface above or outside the canvas such slot or slots
being enlarged at the top to form one or more chambers in the rubber between
the canvas and the outer surface.
In carrying out the invention such slot or slots may be formed or moulded in the
rubber cover or they may be formed in a separate strip inserted between the canvas
and the rubber of the cover such strip being preferably cemented or solutioned
both to the canvas and the cover.
For new covers or tyres we prefer to form the slot or slots therein of keyhole
or similar shape and over the under surface we cement or solution a thin layer or
strip of rubber to hold the edges of the slot or slots in position. The canvas is
then secured or cemented in the ordinary way to the under side of the cover.
We thus form one, two or more chambers in the periphery of the cover capable
of holding air and in which when the tyre is complete, air not under pressure is
enclosed.
Dated this 4th day of December 1894
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in or connected with Pneumatic Tyres.
We, WILLIAM STELFOX, of Lorne Street, Moss Side, Manchester, in the
County of Lancaster, Tin Plate Worker, and JAMES WEDDERBURN OGILVY
WALKER, of Oxford Drive, Kelvinside, Glasgow, in the County of Lanark,
Foreman Rubber Worker, do hereby declare the nature of this invention and in
what manner the same 18 to be performed, to be particularly described and
ascertained in and by the following statement :-
This invention is designed to provide a cover for pneumatic tyres which will
reduce the vibration and also prevent the slipping at present experienced on
muddy roads.
It consists essentially in constructing the cover with one or more slots or grooves
in the rubber above or outside the canvas such slot or slots being preferably

page_text: enlarged at the top and thus forming one or more chambers in the rubber between
the canvas and the outer surface.
It will be fully described with reference to the accompanying drawings in which
as an example a few forms of the invention are illustrated.
Fig. 1. Transverse section of cover.
Fig. 2. Transverse section showing a modification.
Fig. 3. Transverse section of another modification.
The rubber A which forms the cover is formed or moulded with a slot a running
longitudinally therethrough. Such slot may be enclosed or surrounded by the
rubber as in Fig. 1 or it may be in the form of a slit of key-hole or other
suitable section as in Fig. 2 with a thin strip or layer of rubber attached by
cement or rubber solution to the underside to hold the lower edges of the slot in
position.
The canvas B is cemented or otherwise secured in the ordinary way to the under
or inner side of the cover.
In another modification shown in Fig. 3 the slot a is formed in a separate strip
of rubber C inserted between the rubber A of the cover and the canvas B. This
strip C is preferably attached by rubber solution or cement to both the rubber
cover and the canvas lining.
We thus form one, two or more chambers in the periphery of the cover capable
of holding air and in which when the tyre is complete air not under pressure i
enclosed.
We find that in a tyre thus constructed we get a good cushion and (irrespective
of the degree to which the tyre may be inflated) a soft tread and a narrow one.
In addition to which it is practically puncture proof without slowing the tyre in
any way.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. A tyre for the wheels of cycles or other vehicles constructed with one or
more slots or grooves in the rubber between the canvas and the outer surface
forming a chamber or chambers therein substantially as described.
2. A tyre for the wheels of cycles or other vehicles constructed with a chamber
therein substantially as herein described and shown with reference either to Fig. 1,
Fig. 2 or Fig. 3 of the drawings.
Dated this 3rd day of September 1895.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and Loudon, Patent Agents.