An Improvement in Pneumatic Tyres.
Year: 1891

page_text: Date of Application, 9th Apr., 1891
Complete Specification Left, 5th Oct., 1891-Accepted. 19th Dec., 1891
PROVISIONAL SPECIFICATION.
An Improvement in Pneumatic Tyres.
I, WILLIAM ROBERT FOSTER of 87, Grange Road, Bermondsey, in the
County of Surrey India-rubber Manufacturer, do hereby declare the nature of
this invention to be as follows:-
-
My invention relates to the inflated tyres of bicycle and other similar wheels';
and has for its object to provide means of securing the tyre to the wheel rim which
will admit of the tyre being readily removed and repaired or renewed in case of
injury and which will also afford a certain amount of protection to the tyre
against sharp stones and the like by which such tyres are very liable to be
injured.
The invention consists in securing the tyre to the wheel rim (in which it is loosely
held without being fixed by the usual cement) by a sheath or casing enveloping both
the tyre and the wheel rim in the manner hereinafter described. This sheath or casing
may be of leather, canvas, or other suitable fabric and in the forni of a strip of a length
corresponding to the circumference of the wheel and a width sufficient to lap round
the exposed part of the tyre and the wheel rim at the back or sides of which the
edges of the strip are fastened to each other or to the rim. For this purpose they
may be eyeletted and connected together by loose studs or attached to studs fixed
in the sides or back of the wheel rim.
_1001
COMPLETE SPECIFICATION.
An Improvement in Pneumatic Tyres.
I, WILLIAM ROBERT FOSTER of 87, Grange Road, Bermondsey, in the
County of Surrey, India-rubber Manufacturer, 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:-
65
"
My invention relates to the casings or jackets for the inflated or pneumatic
tyres of bicycle and other similar wheels and has for its object to enable the inflated
tyre to he readily removed and replaced by another, in case of injury, without
entirely removing the cover or jacket of the tyre from the wheel.
The invention consists of a jacket or casing which is in the form of a complete
annulus of nearly tubular cross-section that is to say having a slot or gap extending
entirely around the inner circumference of the annulus, the said jacket or casing
enveloping both the tyre and the side edges of the wheel rim and being attached
to the latter by fastenings, which admit of the tyre being readily uncovered and
replaced by another; it being only necessary to unfasten the jacket at one side to
enable this to be done. The kind of inflated tyre to which my invention is to be
applied constitutes no part of my present invention, but is a tube with closed
1

page_text: ends which come together when the tube is lapped round the wheel rim, so that
when the cover is unfastened the tyre may be removed without dismounting the
wheel from its fork.
Reference is to be had to the accompanying drawings, forming part of this
Specification, wherein
Figure 1 exhibits a cross-section of the wheel rim, inflated tyre and cover, seen
partly in perspective.
Figure 2 is an enlarged view of a portion of one edge of the jacket, shewing the
reinforcing rin or bead hereafter referred to.
The same reference letters indicate the same parts in both the figures.
A is the usual wheel rim, B is the inflated tyre.
When the tyre is lapped around the wheel rim it is retained in position and
protected as far as possible from external injury by the jacket or casing C made of
caoutchouc and canvas moulded (and vulcanized in the usual way of making india-
rubber hose) to the form of a complete annulus of nearly tubular form in cross-
section, having a slit or gap extending around the entire inner circumference of
the annulus to admit of its being sprung over the tyre and wheel rim, as shewn in
Figure 1, the edges cl of the jacket or cover embracing the back of the rim and
being secured thereto by fastenings which admit of, say, one edge of the jacket being
readily unfastened for the purpose of removing the tyre and inserting another in
its place.
The preferred means of fastening the jacket consists of studs or hooks d rivetted
or otherwise fixed at intervals to the back of the wheel rim A and engaged by
buttonholes or eyelets e in the jacket. Or the studs or hooks might be fixed to the
jacket and engage in holes made in the wheel rim.
In order to strengthen the edges of the jacket, and prevent the eyelets or studs
tearing out, the edges are beaded or reinforced by the caoutchouc-coated canvas
being lapped around a core of wire or cord and folded upon, and cemented to,
itself, as shewn in Figure 2.
J
.
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 I
make no claim to the strengthening of the edges of the jacket by forming therein
loops to receive wires or cords but that what I claim is-
1. The herein described jacket or cover in the form of a complete annulus of
nearly complete tubular cross-section but with a slot or gap extending around the
inner circumference of the annulus, the said jacket being adapted to envelop the
tyre and its edges being detachably secured at intervals to the back of the wheel
rim, substantially as, and for the purpose, specified.
2. The combination, with the herein described endless jacket or cover of nearly
complete tubular cross-section adapted to envelop the tyre and rim, as described, of
studs or looks fixed to the wheel rim and button holes or eyelets in the edges
of the jacket adapted to engage therewith for securing the jacket and tyre, as
described.
Dated this 5th d
ACCO ANI
W. R. FOSTER.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.