Means for Preventing Puncture of Pneumatic Tyres.
Year: 1897

page_text: Means for Preventing Puncture of Pneumatic Tyres.
I, ARTHUR JOHN CUMING, of 71 Cathedral Square, Christchurch, in the Provincial
District of Canterbury, in the Colony of New Zealand, Journalist, do hereby declare
the nature of my invention to be as follows:-
According to this invention the puncture of pneumatic tyres is prevented by the
employment between the air tube and the outer cover of a layer of sole leather,
green hide papier mache or thin sheet metal together with a strip of wire gauze
bucrum or some analogous material which is wider than the leather. The leather
or other material referred to is in the form of a band extending round the inner
periphery of the tread" of the tyre. The gauze may be employed upon each
side of the leather and the latter may consist of two separate rings or bands
extending round the inside of the tyre, the circumferential edge of one band
overlapping the edge of the other.
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The gauze may be secured to the leather by cementing, sewing, or wire stapling
it thereto.
With my invention it may be possible to dispense with a separate air tube the
layers of leather, gauze, or other material being fixed to an outer cover of rubber
or similar material made so as to be inflatable.
The gauze is employed for holding the leather or other puncture resisting
material in position, and is itself to a large extent, non-puncturable.
COMPLETE SPECIFICATION.
Means for Preventing Puncture of Pneumatic Tyres.
1, ARTHUR JOHN CUMING, of 71 Cathedral Square, Christchurch in the Provincial
District of Canterbury, in the Colony of New Zealand, Journalist, do hereby declare
the nature of my invention, and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement:
--
According to this invention the puncture of the air tube of pneumatic tyres is
prevented by the employment of a strip of greenhide, leather, or similar flexible
puncture resisting material together with a layer or layers of fine woven wire such
as wire gauze, between the air tube and the outer cover.
The greenhide is the material employed to prevent puncture, and it is arranged

page_text: in the form of a band extending round the inner periphery of the "tread" of the
tyre.
The wire gauze is used on account of its being a light resilient material, and is
employed to maintain the greenhide in position, it is used upon one or both sides
of the greenhide which may be secured to it by wire staples, sewing or otherwise.
The gauze offers considerable resistance to a pointed object, if, in an extreme
case, the greenhide or the outer cover beyond it should be perforated.
The accompanying drawings is a vertical central section of a tyre according to
my invention..
The air tube (a) has an outer cover (6) secured in the rim of a wheel in the
manner of an ordinary pneumatic tyre.
The wire gauze (c) surrounds the inner periphery of the cover (b) and is folded
upon itself to form a pocket which receives the band of greenhide (d).
Between the gauze and the air tube (a) is a layer of canvas (f) which protects
the inner tube from friction and holds the several parts in position.
The gauze and the leather are not connected to the air tube or the outer casing,
the canvas (f) cemented round the wire (g) and to the outer cover (b) holding the
parts in position, in the rim (h).
The wire gauze or other similar material employed in addition to holding the
greenhide in position, distributes the pressure of the air tube evenly over the cover
and prevents it from bulging at the sides and forming a flat tread due to
stiffness of the greenhide...
"
I have described my invention as applied to a tyre in which wire is employed
for holding the tyre in the rim, when wire is not so used, the edges of the wire
gauze are cemented, sewn or secured by other means to the inside of the outer cover
in a manner which will be readily understood by tyre manufacturers.
Having now particularly described my invention, and in what manner the same
is to be performed, I declare that what I claim is:
The combination in a pneumatic tyre of a strip of flexible puncture resisting
material between two layers of fine woven wire with a layer of canvas between
the inner layer of woven wire and the air tube substantially as specified and
illustrated.
Datadhi Qh daf T1007