An Improvement in Pneumatic Tyres.
Year: 1892

page_text: Date of Application, 21st Mar., 1892
Complete Specification Left, 3rd Dec., 1892-Accepted, 25th Feb., 1893
PROVISIONAL SPECIFICATION.
An Improvement in Pneumatic Tyres.
I, JEAN BAPTISTE TORRILHON of 25 Rue d'Enghien, Paris, France, Manu-
facturer of India-rubber Goods, do hereby declare the nature of this invention to
be as follows:-
My invention relates to an improvement in pneumatic tyres for velocipede and
other wheels and it has for its object to prevent the escape of the air should the
tyre be accidentally punctured.
The invention consists in applying on the inner surface of the pneumatic tyre an
overlapping series of flap valves composed of strips of rubber, rubber-coated fabric,
or other flexible material cemented by one edge to the inner surface of the tyre so.
as to yield to any sharp object which may puncture the tyre and be closed over the
puncture by the internal air-pressure on the object which caused the puncture being
withdrawn.
Reference is to be had to the accompanying drawings, forming part of this
Specification, wherein
Figure. 1 represents a face view of a portion of a pneumatic tyre partly in section
to shew the manner in which the valves are applied within it.
Figure 2 is a cross-section of the tyre, taken on line 1-2 Figure 1.
Figure 3 is a section shewing the overlapping arrangement of the valve strips.
Figure 4 is a perspective view illustrating the action of a valve when the tyre is
perforated by a nail.
a a are the valve strips of india-rubber or other pliant material, each extending
in the circular but slightly oblique direction around about two-thirds of the inner
circumference of the pneumatic tyre the successive strips overlapping each other
step-wise in the manner shewn in Figure 3, said strips being attached to the tyre
along one edge and for about one-third of their breadth by means of cement or.
otherwise, so that should the casing c and the inflated tyre be pierced, the
corresponding strip a will be pushed inwards, without being punctured, as shewn
in Figure 4 and when the nail is withdrawn the strip will be closed over the orifice
by the internal air-pressure and prevent loss of air, the closure being the more
effective, the greater the pressure.
Dated this 21st day of March 1892
J. B. TORRILHON,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.

page_text: An Improvement in Pneumatic Tyres.
I, JEAN BAPTISTE TORRILHON of 24 Rue d'Enghien, Paris, France, Manu-
facturer of India-rubber Goods, 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 pneumatic tyres for velocipede and
other wheels and it has for its object to prevent the escape of the air should the
tyre be accidentally punctured.
The invention consists in applying on the inner surface of the air chamber a
series of flap valves composed of strips of rubber, rubber-coated fabric or other flexible
material overlapping each other like the scales of a fish and cemented by one edge
to the inner surface of the air chamber so as to yield to any sharp object which
may puncture the tyre and be closed over the puncture by the internal air-pressure
on the object which caused the puncture being withdrawn and thus prevent the
deflation of the tyre.
Reference is to be had to the accompanying drawings, forming part of this
Specification, wherein
Figure 5 shows the valve strips as formed of doubled strips or flattened tubes
cemented one to the other within the air chamber in a longitudinal direction.
Figure 6 also shows longitudinal overlapping strips.
Figure 7 shows longitudinal strips cemented to the air chamber by their opposed
edges and overlapping by their free edges.
Figure 8 shows a single longitudinal strip cemented by both edges to the interior
of the air chamber.
a, a are the valve strips made of india rubber, rubber fabric or other pliant
material, disposed within the air chamber of the tyre lengthwise of the tyre, the
successive strips overlapping each other and being attached along one edge, for
about one third of their breadth by means of cement or otherwise.
In Figure 7 two valve strips a are cemented by their opposite edges d, e to the
interior of the air chamber and overlap by their free edges while in Figure 8 a
single strip a is cemented along both its edges fy. It will be observed that in this
latter arrangement, the width of the strip being equal to or even greater than the
circumferential development of the air chamber, the strip after being cemented
thereto will present the loose baggy form shown.
In any case the function of the valves is the same, namely, when the air chamber
is inflated and upon the wheel h, should the jacket c and chamber b be pierced by a
nail or other sharp object the free end of the corresponding strip a will be pushed
inwards without being punctured and when the nail is extracted the strip will be
closed over the orifice by the internal air pressure and prevent any loss of air, the
closure being the more effective the greater is the pressure employed.
The invention may be applied to the air chambers of all kinds of pneumatic tyres
whatever may be the form of the wheel rim or the mode of securing the jacket
thereto.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
1 claim is
The combination, with the air chamber of a pneumatic tyre, of overlapping strips
of india-rubber or other flexible material, each cemented to the internal surface of

page_text: the air chamber b, so as to act as valves adapted to be closed by the internal air
pressure over any puncture which may be made in the air chamber, substantially as
herein before described and illustrated in the drawings.
Dated this 3rd day of December 1892.
J. B. TORRILHON,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.