Improvements in Pneumatic Tyres.
Year: 1896

page_text: Date of Application, 7th May, 1896
Complete Specification Left, 5th Feb., 1897-Accepted, 10th Apr., 1897
Improvements in Pneumatic Tyres.
ERNEST GEORGE EDMANDS, 63 Wilton Road Sparkhill Birmingham Manager,
and ROBERT WILLIAM EDLIN 160 Bradford Street Birmingham, Engineer do
hereby declare the nature of this invention to be as follows:-
Our invention relates to improvements in pneumatic tyre covers which are held
in position on the wheel-rim by means of inextensible wires or cores placed in each
edge of the cover.
In carrying out our invention we employ instead of inextensible wires or cores
a series of short lengths of metal or other suitable material of about 4" long wide
" thick, these are bent, in the form of a triangle with the ends left about?" apart.
The triangular pieces are the joined or hooked into each other, endways, thus
forming a continuous band of a "zig-zag" or "dove-tail" shape of a suitable size to
fit the smallest circumference of the wheel rim.
When our invention is applied to a pneumatic tyre cover the action of inflating
the air-tube causes the fibres of the restraining fabric of which the tyre cover is
lined, to act on the triangular pieces and have a tendency to alter the angles
thereby causing the edges of the cover to contract in circumference and so cling to
the bed or smaller diameter of the wheel-rim.
It is obvious that a tyre cover constructed in accordance with our invention is
much easier to remove from, or attach to the wheel rim, as owing to the edges
being extensible they can be readily expanded over any form of rim without the
necessity of a deep groove being made in the rim such as, is now used in the tyre
known as the Dunlop.
In order to prevent the tyre covers when made in accordance with this, our
invention from leaving the rim should the air tube become deflated we may harden
and temper the above triangular pieces forming the band so that they will retain
their original shape. We may modify the above construction by using a continuous
length of metal bent in the angular form above described.
We may also apply our invention to that class of pneumatic tyre known as
"single tube" thereby dispensing with the use of cement for fixing.
Dated this Seventh day of May 1896.
Improvements in Pneumatic Tyres.
We, ERNEST GEORGE EDMANDS, of 63 Wilton Road, Sparkhill, Manager
and ROBERT WILLIAM EDLIN, of 160 Bradford Street, Engineer, both of
Birmingham, 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 :-
Our invention relates to improvements in pneumatic tyre covers which are held

page_text: in position on the wheel-rim by means of inextensible wires or cores placed in each
edge of the covers.
And in order that our invention may be thoroughly understood, we now proceed
to describe the accompanying drawing thereof, reference being had to letters and
figures marked thereon.
Fig. 1, is a plan of a part of the cover with the triangular piece of wire shown
on one side partly in dotted lines, and on the other side in full with the canvas
recess in section."
Fig. 2, is a section on line A. B.
Fig. 3, is a view of how the short lengths hook together.
In carrying out our invention we employ instead of inextensible wires or cores a
series of short lengths of metal or other suitable material of about 4" long "wide
"thick, these are bent in the form of a triangle with the ends left about " part.
The triangular pieces a are then joined or hooked into each other at e eudways thus
forming a continuous band of a "zig-zag" or "dove-tail" shape of a suitable size
to fit the smaller circumference of the wheel-rim.
Each of the triangular pieces of wire a after being joined or hooked together
at e is sewu in a recess d formed in the foundation of canvas c at each edge of the
india rubber cover b.
When our invention is applied to a pneumatic tyre cover the action of inflating
the air tube causes the fibres of the restraining fabric of which the tyre cover is
lined, to act on the triangular pieces of wire a and have a tendency to alter the
angles thereby causing the edges of the cover to contract in circumference and so
cling to the bed or smaller diameter of the wheel-rim.
It is obvious that a tyre cover constructed in accordance with our invention is
much easier to remove from or attach to the wheel-rim as owing to the edges being
extensible they can be readily expanded over any form of rim without the necessity
of a deep groove being made in the rim such as is now used in the tyre known as
the Dunlop.
In order to prevent the tyre covers when made in accordance with this our
invention from leaving the rim should the air tube become deflated we may harden
and temper the above triangular pieces a forming the band so that they will retain
their original shape.
We may modify the above construction by using a continuous length of metal
bent in the triangular form above described.
We may also apply our invention to that class of pneumatic tyres known as "single
tube "thereby dispensing with the use of cement for fixing.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. In pneumatic tyre covers, the combination of a series of short lengths of
wire a bent in triangular forms and booked or joined together, and sewn in a recess a
on each side of the india rubber cover b and canvas foundation c, substantially as
herein described and according to the accompanying drawing.
2. In pneumatic tyre covers, the combination of the various parts put together
in the manner described in the above specification for the purpose specified.
Dated this 5th day of February 1897.
J. P. BAYLY,
18 Fulham Place, London, W., Agent for the Applicants.