Improvements in or relating to Pneumatic Tyres.
Year: 1898

page_text: Date of Application, 7th Apr.,
1898
Complete Specification Left, 6th Jan., 1899-Accepted, 18th Mar., 1899
PROVISIONAL SPECIFICATION.
Improvements in or relating to Pneumatic Tyres.
We, WILBRAHAM EDMUNDS, of The New Ixion Tyre & Cycle Company Limited,
of 143, Holborn, in the County of Middlesex, Gentleman, and WILLIAM HENRY
CRESSWELL, of The Woodley Tyre Company. Limited, Woodley, in the County of
Chester, Engineer, do hereby declare the nature of this invention to be as
follows:
In pneumatic tyres where the canvas is cut on the bias or is woven in an
open manner so as to allow of considerable expansion and contraction it some-
times happens that after a time the tyre or cover becomes so stretched or enlarged
with putting on and taking off the wheel rim that it ceases to fit accurately;
our invention is designed to overcome this difficulty.
In carrying our invention into effect we may use ordinary canvas cut on the
bias or an open woven canvas or other thread or fabric providing the necessary
qualities. To prevent the tyre or cover from being deformed in the manner
above explained we provide one or both edges with a strip of tape, canvas, or
other suitable material which may be solutioned or vulcanized in position, or
may be moulded in place when the tyre is made. This strip is so made that it
will not stretch in a lengthwise direction, and consequently the tyre or
cover does not become deformed as the strip prevents it from ever extending
beyond the fixed limit. Instead of employing a special material such as tape
or canvas we may use simple threads lying side by side in the rubber or canvas
or secured thereto; or if a special canvas or fabric be woven, the effect may be
obtained by making a portion of the edges inextensible preferably by weaving.
or running in threads in the manner indicated. These edge pieces are in all
cases of a diameter sufficiently large to allow of the tyre or cover freely passing
over the largest diameter of the flange of the wheel rim and have nothing to do
with the retaining of the tyre or cover upon the rim.
Although we prefer to make these edges continuous we have nevertheless
obtained satisfactory results when we have cut them at intervals, and we may
adopt that method if preferred, or we may make the edges of a number of threads
extending round the circumference but not quite meeting and arranging them
so as to break-joint.
Dated this 7th day of April 1898.
'
BOULT & WADE,
Agents for the Applicants.

page_text: Middlesex, Gentleman, and WILLIAM HENRY CRESSWELL, of The Woodley Tyre
Company Limited, Woodley, in the County of Chester, Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement;
-
In pneumatic tyres where the canvas is cut on the bias or is woven in an
open manner so as to allow of considerable expansion and contraction it some-
times happens that after a time the tyres or cover becomes so stretched or enlarged
with putting it on and taking it off the wheel rim that it ceases to fit accurately;
our invention is designed to overcome this difficulty.
or
In carrying our invention into effect we may use ordinary canvas cut on the
bias or an open woven canvas or other thread or fabric providing the necessary
qualities. To prevent the tyre or cover from being deformed in the manner
above explained we provide one or both edges with a strip of tape, canvas, or
other suitable material which may be solutioned or vulcanized in position, or
may be moulded in place when the tyre is made. This strip is so made that it
will not appreciably stretch in a lengthwise direction, and consequently the tyre
cover does not become deformed as the strip prevents it from extending
beyond the fixed limit. Instead of employing a special material such as tape
or canvas we may use simple threads lying side by side in the rubber or canvas
or secured thereto; or if a special canvas or fabric be woven, the effect may be
obtained by weaving or running. in threads in the manner indicated. These
edge pieces are in all cases of a diameter sufficiently large to freely pass
over the largest diameter of the flange of the wheel rim and have nothing to do
with the retaining of the tyre or cover upon the rim.
Although we prefer to make these edges continuous we have nevertheless
obtained satisfactory results when we have cut them at intervals, and we may
adopt that method if preferred, or we may make the edges of a number of threads
extending round the circumference but not quite meeting and arranging them
so as to break-joint.
The accompanying drawing represents a cross-section of an Ixion tyre embody-
ing this invention, part of the lining of the outer cover and the air tube being
removed. A is the indiarubber of the outer cover lined with a double thickness
of canvas B cut on the bias, or woven in an open manner, so as to allow of con-
siderable expansion and contraction. In order to prevent the tyre becoming
deformed by putting it on and taking it off the wheel rim a number of times, a
strip C of material so made that it will not appreciably stretch in a lengthwise
direction is solutioned, vulcanized or otherwise attached to the canvas B pre-
ferably between the two layers of canvas near the edges above the pockets con-
taining the bands 1).
Preferably the strip C consists of a number of concentric threads solutioned to
the canvas lining.
The ends of each thread are not necessarily jointed but may be brought together
end to end or "butted" the ends of adjacent threads breaking joint. Alter-
natively the strip may consist of one thread wound a number of times round
the tyre on the canvas lining and solutioned or otherwise attached thereto. In-
stead of forming the strip C of parallel threads as above, it may be made of tape
canvas or the like.
Although this invention has been described with reference to an Ixion tyre, it
is equally applicable to all tyres provided with a canvas lining.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed, we declare that what we
claim is
1. In a pneumatic tyre having an expansible lining, a strip such as C at or
near each edge of the lining, substantially as and for the purpose described.

page_text: 2. In a pneumatic tyre having an expansible lining, a strip such as C at or
near each edge of the lining composed of a number of turns of one thread sub-
stantially as and for the purpose described.
Dated 1
Ու 1
1000
W. H. QRESSWELL,
W. EDMUNDS,
Boult & Wade,
Agents for the Applicants.