Improvements in the Rims and Tyres of Wheels for Cycles and other Vehicles.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Rims and Tyres of Wheels for Cycles and
other Vehicles.
I, REUBEN CORSHAM, of 69 Skinner Street, in the City of London, Copying
Machine Maker, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in the rims and tyres of wheels in which
pneumatic or inflatable tyres are employed; and its object is to provide means
for retaining the tyre and its outer cover in the concave rim of the wheel.
For this purpose I make the rim of a cross section somewhat like a Moorish
arch, that is to say in the shape of a circular, elliptic, oval, or other similar segment
with its ends turned inwards; and I preferably provide this rim with corrugations
or grooves running circumferentially round its concave side. The object of the
ends of the arch like section, that is to say the lateral edges of the rim, being
turned inwards, and of the circumferential corrugations or grooves where such are
employed is to afford means for securing the pneumatic tyre and its outer cover in
place in the rim. The pneumatic or inflatable tyre is made in the usual way and
with the usual materials but I make the outer cover supporting the tyre and
holding it in place on the rim, larger than usual, so that instead of being inserted
only a short distance into the rim at each side, I preferably make it large enough
to go further round until the inner edges nearly or quite meet, or even overlap one
another. When the tyre with its outer cover is thus put in place in the hollow of
the rim, and air is forced into the inflatable tube, the latter and its cover are
distended, and the inner edges of the cover are thereby forced into the circum-
ferential corrugations or grooves where such are employed, and in behind the
inwardly projecting edges of the rim, in such manner as to be securely locked, and
held in place thereby; and that too without the necessity of employing wires or
making the edges of the cover thicker than the adjacent parts, as is now practised
in tyre covers that are held in place by wires or by the thickened edges being
forced into a recess by the pressure of the air in the tyre.
In some cases I provide the outer cover or rim, or both with hooks or other
suitable devices for the purpose of holding such outer cover in place during
inflation of the tyre.
The corrugations or grooves may be formed in the material of the rim, or they
may be made in a separate strip of metal or other suitable material inserted into
the hollow of the rim, and adapted to bear against the internal surface thereof
when the pneumatic tyre is inflated.
Dated this 19th day of March 1896.
R. CORSHAM,
Per W. H. Beck,
115 Cannon Street, London, E.C., Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in the Rims and Tyres of Wheels for Cycles and
other Vehicles.
I, REUBEN CORSHAM, formerly of 69 Skinner Street, in the City of London,
but at present of 28 Kingsland Road, London, Copying Machine Maker, 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 improvements in the rims and tyres of wheels in which
pneumatic or inflatable tyres are employed; and its object is to provide means for
retaining the tyre and its outer cover in the concave rim of the wheel.
And in order that the said invention may be fully understood I will proceed to
describe the same with the aid of the accompanying sheet of drawings, in which
Figure 1 represents a cross section of a rim and tyre constructed in accordance
with my invention,
Figure 2 a sectional view showing one form of my improvements in connection
with the tyre, Figure 3 a similar view of another form of the same improvement
and
Figure 4 a detail view of part of the tyre shown in Figure 3.
For the purposes of my invention I make the rim A (see Figure 1) with
corrugations or grooves B running circumferentially round its outer periphery.
The object of the circumferential corrugations or grooves is to afford means for
securing the pneumatic tyre C and its outer cover-D in place in or on the rim A.
The pneumatic or inflatable tyre C is made in the usual way and with the usual
materials; but I make the outer cover D supporting the tyre C and holding it in
place on the rim, larger, that is to say wider than the usual arch-shaped covers so
that instead of being inserted only a short distance into the rim at each side,
I make it large or wide enough to go further round until the inner edges nearly or
quite meet, as shown in Figure 2, or even overlap one another as shown in Figure 3.
When the tyre C with its outer cover D is thus put in place on the outer periphery
of the rim A, and air is forced into the inflatable tube, the latter and its cover are
distended, and the inner edges of the cover are thereby forced into the circum-
ferential corrugation or grooves of the rim, as shown in Figure 1, in such manner
to be securely locked and held in place thereby; and that too without the necessity
of employing wires or making the edges of the cover D thicker than the
adjacent parts, as is now practised in tyre covers that are held in place by wires or
by the thickened edges being forced into a recess by the pressure of the air in
the tyre.
In Figure 2, E are hooks and eyes attached to two edges of the cover D for
holding them in place during the process of inflation of the pneumatic tube C,
and preventing the cover from distending laterally beyond a predetermined
limit.
In Figures 3 and 4, F are spring buttons, similar to those sometimes used for
fastening gloves, secured to one of the flaps or edges of the cover D, and G are
corresponding cups, caps, or eyelets secured to the other flap or edges, and
adapted to receive the spring buttons F for the same purpose as the hooks and
eyes E shown in Figure 2.
The hooks and eyes E, the spring buttons F and the cups, caps or eyelets G are
shown by way of example only, as any other suitable kind of fastening may be
employed, such as swivel hooks, spring catches, plain buttons and button holes,
loops or hooks and studs, and so forth.

page_text: When the edges of the cover D are secured together by their fastenings with
the pneumatic tube C enclosed in it with the charging valve H passed through the
cover D and the whole laid in the concavity of the rim as shown in Figure 1 with
the charging valve H passed through the hole in the rim, and secured by a uut in
the usual way, and the pneumatic tube C is inflated, the pressure forcing the inner
periphery of the cover D radially against the rim and into the hollows of the
corrugations B, is quite sufficient to secure the tyre to the rim without any other
fastening whatever being necessary.
I prefer to arrange the fastenings of the cover so that they come as near to one
edge of the rim as possible in order to facilitate the unfastening of the cover to
get at the inner tube for repairing the same in case of puncture.
The improved tyre above described may be used with any suitably shaped rim,.
though I prefer to use a rim of the form shown in Figure 1.
The outer flap of the cover D shown in Figure 3, or one of the edges of the
cover shown in Figure 2, when the joint is brought out near one edge of the rim,.
may be cemented or otherwise permanently attached to the rim.
Having now particularly described and ascertained the nature of the said inven
tion, and in what manner the same is to be performed, I declare that what I.
claim is :-
First. The improvement in the rims of wheels for cycles, and other vehicles,
which consists in providing them with corrugations or grooves running circum-
ferentially round the same, substantially as described and for the purpose specified.
Second. The improvement in the tyres of wheels for cycles and other vehicles,
which consists in making the outer cover wide enough to pass nearly or quite round
the pneumatic tube enclosed within it, so that the inner edges nearly or quite meet
as shown in Figure 2, or overlap as shown in Figure 3, and in providing such edges
with fastenings whereby they can be connected together to prevent the cover from
distending laterally beyond a predetermined limit under the expansive pressure of:
the air in the pneumatic tube, substantially as described.
Dated this 13th day of January 1897
K. CORSHAM,
Per W. H. Beck,
115 Cannon Street, London, E.C., Agent..