Improvements in and relating to Tyres and Rims for the Wheels of Cycles and other Vehicles.
Year: 1895

page_text: Date of Application, 26th Feb., 1895
Complete Specification Left, 20th Nov., 1895-Accepted, 20th Feb., 1896
PROVISIONAL SPECIFICATION.
Improvements in and relating to Tyres and Rims for the Wheels of
Cycles and other Vehicles.
WILLIAM MCPHAIL of Roseville, Wicklow, in Ireland, Printer do hereby
declare the nature of this invention to be as follows:-
My invention relates to improvements in and relating to tyres and rims for the
wheels of cycles and other vehicles which consists of a grooved india rubber tyre
and a curved metal rim in two parts. The tyre is composed of sections with two
longitudinal openings in each, and several short perpendicular opening connections.
The larger opening being closed at one end in the casting with wall or partition of
rubber one half of whose thickness lies inside the hollow while the other half
projects outside and both ends are closed in the cementing of the sections together
to form one whole tyre. The tyre will then contain one small continuous opening
in the solid upper part of tyre with short perpendicular openings leading from
same to each of about thirty large sectional cells, with an automatic valve inside
each. These cells are then filled with air through the small continuous opening
which is connected with a single inflator in the rim.
The tyre thus composed is grooved on either side to allow of its being grasped
by the curved edges of the rim.
A shield or cover of india rubber or other suitable material is provided round
the tyre the edges of which are thickened by bands or strips of rubber solutioned
thereto, whereby the shield or cover is held by the edges of the rim, and also the
india rubber grooves proted from injury by chafing with the metal edges.
The metal rin is composed of two parts, with their outer longitudinal edges
curved or bent inwards to grasp the rubber tyre. The main part of the said rim
is provided with metal studs, which engage in corresponding slots formed in the
second part of the rim; this said main part of the rim is also provided with a
narrow continuous band of iron round the centre of same, with two rows of screw
holes one row to receive the screw ends of the spokes of the wheel, the other
row the thumb screws which pass through corresponding holes in the flange of
second part of rim, and which overlaps the iron band. The thumb screws being
then tightened with nuts to the flange of second part of rim the two parts are
securely locked together.
Dated this 18th day of February 1895
COMPLETE SPECIFICATION.
Improvements in and relating to Tyres and Rims for the Wheels of
Cycles and other Vehicles.
I WILLIAM MCPHAIL of Roseville, Wicklow, in Ireland Printer 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 improvements in and relating to tyres and rims for the

page_text: wheels of cycles and other vehicles and has for its object to construct an india-
rubber tyre composed of a number of short sectional cells with wall of rubber
between each and cemented together, and connected with a single continuous air
passage by a short vertical aperture; in combination with an improved method of
securing the tyre to the rim by means of a rubber cover the longitudinal edges of
which are thickened by a band of rubber or leather solutioned thereto with a strip
of canvas or other suitable material solutioned round the tread of tyre inside the
cover and a metal rim. in two parts with a narrow continuous band of metal
attached to or cast on the main part to which the spokes of the wheel and the
thumb-screw fasteners are secured, the main part of rim is also fitted with metal
studs which engage in corresponding slots formed in the second part of rim and
the two parts are secured firmly together with screws and nuts.
And in order that my said invention may be more readily understood I now
proceed to describe the accompanying drawings thereof, reference being had to
letters and figures marked thereon.
Figure 1 represents a transverse section of the grooved india-rubber tyre
with large opening or cell small air passage c, and vertical aperture d narrow
tread g, india-rubber cover k with thickened edges 7 and a curved metal rim in two
parts with a metal band n, and a row of. metal studs o attached to the main part m,
with flange g on the inner edge of the second part p and the two parts fastened
together with screws and nuts.
Figure 2 is a diagram showing the way in which the valve e opens to admit air
and to automatically close against any escape of air from within.
Figure 3 is a plan of the rim showing the method whereby the two parts
constituting same are securely bound together as hereinafter more fully described.
Figure 4 shows the length of each section. The india-rubber tyre a is con-
structed in short sections of about 3 inches each longitudinally, with large
opening, air passage c vertical aperture d and air valve e in each.
The larger opening bin each section being closed at one end in the casting with
a thin wall of rubber with thickened edge, one half its thickness lying inside the
hollow while the other half projects outside, and both ends are closed in the
cementing of the sections together to form one whole tyre, containing a number
of sectional air cells b, one continuous air passage vertical aperture d and
automatic air valve e. By means of an air pump with one or two ordinary air
valves in the rim air may be forced into the continuous opening c thence through
the vertical opening d, and rubber valves e, into the sectional cells b, and the
pumping being withdrawn the valves e close simultaneously against any escape of
air from the said sectional air cells. The tyre is provided with a narrow band h of
canvas or other suitable material solutioned round the tread 9 also with a strip
of canvas solutioned round that portion of tyre next the rim at i. The rubber
valve e Fig. 1 consists of a thin flap of rubber placed across the small vertical
aperture d in each cell b and solutioned at both ends leaving the centre free to
expand (Fig. 2 e 1) to admit air and to automatically close (Fig. 2 e 2) when the
pumping of air is withdrawn.
The tyre thus composed is grooved on either side to allow of its being firmly
grasped by the curved edges j of the rim-a cover k composed of india-rubber,
lined with canvas is provided round the tyre with the longitudinal edges thickened
with bands of rubber or leather solutioned thereto whereby the cover is held by
the curved edges ; of the rim.
The main part m of the rim is fitted with one or two air valves through which
air may be forced into the continuous passage and air cells as above described the
said main part m is also provided with an endless band of metal n attached to or
cast on said main part in which threaded holes are made to received the screwed
ends of the spokes of the wheel and the thumb-screws which fasten the two
parts of the rim together also with metal studs o which engage in corresponding
slots formed in the second part p the second part is provided with a narrow
flange g with holes and notched on the edge to allow it to pass between the spokes

page_text: and overlap the metal band n; both parts m and p being put together and the thumb-
screws tightened with nuts s to the flange of the second part the two parts are
securely locked together. It will be understood that the foregoing description is
given for illustration and that the parts and materials may be varied within the
scope of my invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
First. In an improved india-rubber tyre for the wheels of cycles and other.
vehicles, the shape and combination of the india-rubber tyre a, composed of a
number of sectional cells with wall of rubber between each and cemented
together and connected with a single continuous air passage c by vertical apertures d
and automatic air valves e through which continuous air passage and vertical
apertures all the cells may be simultaneously filled with compressed air and
retained for an indefinite period in combination with an improved method of
securing the tyre to the rib by means of a canvas-lined rubber cover k with
thickened edges and a canvas band h, or strip of other suitable material solutioned
round the tread g of the tyre with a strip of canvas i also solutioned round that
portion of the tyre next the rim in the manner substantially as herein described
and illustrated in the accompanying drawing.
r
Second. In an improved rim for the wheels of cycles and other vehicles the use
and application of a metal rim composed of two parts with their outer longitudinal
edges curved or bent inwards to grasp the rubber tyre a as shewn; in combination
with an endless band of metal n attached to or cast on the main part m with holes
to receive the screw ends of the spokes of wheel and the thumb-screws and with
metal studs o which engage in corresponding, slots formed in the second part p;
the second part is also provided with a narrow flange with holes and notched on
the edge; the said two parts being firmly secured together by means of thumb-
screws tightened with nuts s in the manner substantially as herein specified and
set forth in the accompanying drawings.
Dated this 18th day of November 1895.
1
WILLIAM MCPHAIL.