Improvements in the Construction of Pneumatic Tyres, and in the Mode of Fitting the same to their Wheels.
Year: 1893

page_text: Date of Application, 6th Oct., 1893
Complete Specification Left, 6th July, 1894-Accepted, 15th Sept., 1894
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Pneumatic Tyres, and in the
Mode of Fitting the same to their Wheels.
I CHRISTIAN HAMILTON GRAY of Silvertown in the County of Essex,
Engineer, do hereby declare the nature of this invention to be as follows:
This invention relates to that class of pneumatic tyre which consists of a hoop of
flexible material bent into a U shape in cross section, or into a tubular form, when
applied to the wheel rim, the object being so to attach the tyre to the wheel rim,
that ready access may be had to the interior thereof, for the purpose of applying
the means for closing any cuts or incisions that may have been made in the tread
thereof, while in use.
The tyre I attach to the wheel rim so that the lips may bed thereon. One of the
lips I by preference secure permanently, by cement, to the wheel rim.
The other lip I mould with a recess to receive a coil of binding wire, which,
when brought to tension, will tighten that lip upon the wheel rim, and, with the
aid of tacky cement applied between the contact surfaces of the tyre and wheel rim,
will form an air-tight joint.
In some cases I may secure both lips to the rim with a binding wire, so that the
tyre may be opened up at either side.
The air tight joint I may secure by applying to the surface of unvulcanised, or
partially vulcanised rubber, a solvent which will render such surface tacky.
I provide suitable means for slackening the binding wire, to allow of its
temporary removal for the purpose of repairing, on the inner face of the tyre, any
damage which may have occured to the tread.
As an obvious modification of the mechanical means of temporarily attaching
one lip of the pneumatic tyre to the wheel rim I may form the wheel rim with an
undercut edge to receive a ring of metallic hooks secured, at intervals, to that lip
of the pneumatic tyre which it is designed to detach from the rim, for the purpose
of gaining access to the interior of the tyre.
This ring of hooks may be embedded in an undercut beading moulded on the lip
of the tyre, and to secure the air-tight junction between this lip and the wheel rim,
an interposed cushion or coating of tacky rubber, or equivalent material, or a
solvent of the rubber, may be employed to produce an air-tight joint.
In either of these cases I may find it desirable to form the extremity of the
detachable lip of a hoop of elastic rubber distended on a "former," before being
cemented to the hoop of india rubber compound which forms the main portion of
the tyre.
The use of this distended hoop is to bring pressure upon the wheel rim, and
assist in making a joint which will be secure against the internal pressure of the
inflating air.
Dated this 6th day of October 1893.
NEWTON & SON,
Agents for the Applicant.

page_text: Improvements in the Construction of Pneumatic Tyres, and in the
Mode of Fitting the same to their Wheels.
I CHRISTIAN HAMILTON GRAY of Silvertown, in the County of Essex,
Engineer, 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 :--
This invention relates to that class of pneumatic tyre which consists of a hoop of
flexible material, bent into a shape in cross section, or into a tubular form, when
applied to the wheel rim, the object being so to attach the tyre to the wheel rim,
that ready access may be had to the interior thereof, for the purpose of applying
the means for closing any cuts or incisions that may have been made in the tread
thereof while in use.
In the accompanying drawing -
Fig. 1 shews in transverse section the pneumatic tyre as constructed and applied
to the wheel rim according to my invention.
Fig. 2 shews in transverse section a modification of the tyre and of the means of
attaching it to the wheel rim, so as to provide ready access to the inner face of the
tyre, to remedy injuries thereto.
The lip A of the tyre (see Fig. 1) is by preference secured permanently by
cement to the wheel rim D.
The other lip, B, is moulded with a recess to receive a hoop C of binding wire,
which, when brought to tension, will tighten that lip upon the wheel rim, and with
the aid of tacky cement applied between the contact surfaces of the tyre and
wheel rim, will form an air-tight joint, which admits of being opened up when the
binding wire C is slackened, to give access to the interior of the tyre.
This binding wire (see Fig. 3) I form with right and left handed threads at its
extremities, to receive a coupling nut C', threaded to correspond therewith. The
nut is pierced with holes in its periphery to receive a turning pin, which, on
rotating the nut, will tighten up or slacken the binding wire as desired.
In some cases I may secure both lips to the rim with a binding wire, so that the
tyre may be opened up at either side.
The air-tight joint I may secure by applying to the surface 6 of the lip B
a solvent which will render such surface tacky.
Fig. 2 shews another mode of temporarily attaching one lip of the pneumatic
tyre to the wheel rim. In this case, the wheel rim is formed with an undercut or
turned-over edge d, to receive a ring of metallic hooks E, secured at intervals to
the lip B, or that lip of the tyre which it is designed to detach from the rim, for
the purpose of gaining access to the interior of the tyre.
This ring of hooks may conveniently be attached by sewing to the tyre. To
secure the air-tight junction between the lip B and the lip A, I interpose a cushion
or coating of tacky rubber or equivalent material F; or a solvent of the rubber
may be employed to produce an air-tight joint.
In either of these cases, I may find it desirable to form the extremity of the
detachable lip B of a band of elastic rubber distended on a "former," before
being cemented to the hoop of india rubber compound which forms the main
portion of the tyre, as described and claimed in the Specification of a Patent applied
for by me (No. 187523) of even date with the present application.
The use of this distended band is to bring pressure upon the wheel rim, and
assist in making a joint which will be secure against the internal pressure of the
inflating air.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that
what I claim is :-
The construction of pneumatic tyres, and the means for securing them in place
on the wheel rim, as described and shewn in the accompanying drawing.
Dated this 5th day of July 1894.
NEWTON & SON,
Agents for the Applicant.