An Improved Pneumatic Tyre.
Year: 1897

page_text: PROVIDIUNAL DEECIFICATION.
An Improved Pneumatic Tyre.
We, SIMON MACDONALD, Warehouseman, and LEONARD SALE HARRISON, Salesman,
both of 71, Cathedral Square, Christchurch, in the Provincial District of Canterbury,
in the Colony of New Zealand, do hereby declare the nature of this invention to be as
follows:-
According to this invention a pneumatic tyre for bicycles and the like is made of
one material or of layers of different materials arranged to form a continuous tube
instead of being composed of an air tube and separate outer cover as has hitherto been
usually the case.
Our tyre consists of an india-rubber tube placed between two other tubes of canvas
buckrum or the like material forming one tube to which is sewn or cemented or
secured by other suitable means, two rings of copper wire upon opposite sides of the
tyre for securing it in the rim in a manner somewhat similar to that employed for
securing the outer cover of the "Dunlop" tyre.
The wires may be woven into the canvas when the tyre is being built or they may
be sewn in a fold or pleat formed in the outer canvas.
Punctures are mended and other similar repairs affected where practicable from the
inside through the orifice through which the tyre is inflated, or, where this is
inconvenient, patches are cemented upon the outside.
The leading feature of our invention consists in the employment of a single con-
tinuous tube, and the material of, which it is constructed, and the manner of its
construction need not be precisely as described as it may be found desirable to cover
the canvas with rubber solution or vary other details without departing from the
spirit of our invention.
We, SIMON MACDONALD, Warehouseman, and LEONARD SALE HARRISON, Salesman,
30 both of 71, Cathedral Square, Christchurch, New Zealand, 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 :-

page_text: of a continuous tube which may be formed in layers of different flexible material
arranged one within the other, the resulting tube being held in position in the rim of
the wheel by two endless wires which extend around and are secured to the tyre and
take into recesses formed in opposite sides of the rim when the tyre is inflated.
.
The tyre is preferably made of canvas and india-rubber, the canvas being placed
between two layers of india-rubber.
The wires may he woven into the canvas or cemented or sewn thereto or placed in the
outer layer of india rubber when the tyre is being made, but however they are secured,
they with the material covering them must project sufficiently far from the tube to
take into the recesses in the rim and keep the tyre in its place.
Referring to the accompanying drawing which is a vertical section illustrating our
invention.
The tyre is composed of inner and outer tubular layers of rubber (a) and (b)
respectively and a middle layer of canvas (c).
The latter is not a complete tube the edges of the canvas being cemented or other-
wise secured to the endless wires (d) (e) which extend circumferentially around the
tyre.
The layer of canvas is omitted in the portion of the tyre (i) between the wires (a) (e)
and the rubber is there made particularly flexible to allow the wires with their
covering to be pressed into the recesses (f) (g) in the rim (h) when the tyre is inflated
in the ordinary manner.
We are aware that wires have been used for holding the cover of a pneumatic tyre
in the rim of a wheel but
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed, we declare that what
claim is:
we
1. In combination a single tube pneumatic tyre endless wires extending circum-
ferentially around and secured thereto a rim having recesses into which the wires pass
when the tyre is inflated substantially as specified and illustrated.
2. In combination a single tube pneumatic tyre endless wires secured circum-
ferentially thereto, a rim having recesses to receive said wires and a flexible portion of
the tube between the wires which permits them to pass into the recesses when the
tyre is inflated substantially as specified and illustrated.
DXPLOS
ADID LONION
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.