Improvements in Pneumatic Tyres for the Wheels of Bicycles and other Velocipedes, Motor Cars, and Road Vehicles.
Year: 1896

page_text: Date of Application, 21st Dec., 1896
Complete Specification Left, 21st Sept., 1897-Accepted, 20th Nov., 1897
Certain Improvements in Pneumatic Tyres for the Wheels of Bicycles
and other Velocipedes, Motor Cars, and Road Vehicles.
We, FRANK IORNS GIBBS and WILLIAM WRIGHT, trading together as Gibbs &
Wright, of 70 Lower Hurst Street, in the City of Birmingham, Tinplate Workers-
and Metal Workers, do hereby declare the nature of this Invention to be as
follows:-
This Invention consists of the herein described improvements in pneumatic
tyres for the wheels of bicycles and other velocipedes motor cars and road
vehicles.
By our Invention a pneumatic tyre is prevented from collapsing when the air
has partly escaped therefrom and is thus prevented from being damaged when
used in a deflated or partly deflated state.
This Invention is applicable to pneumatic tyres of all kinds whether made with
an internal indiarubber air tube and a separate outer covering surrounding the
same or made without a separate internal air tube like what are known as the
Fleuss" tubeless Pneumatic Tyres or made as a single tube pneumatic tyre.
In carrying out this Invention we provide within the pneumatic tyre a ring of
cork which extends all round inside the tyre and wheel rim and is made of about
the same size and shape in cross section as is the air cavity in the pneumatic tyre
when inflated. This cork ring does not prevent the inflation of the pneumatic
tyre in the ordinary way but when the said tyre becomes deflated or partly deflated
the internal cork ring forms a support for the walls of the tyre and thus prevents
the same from collapsing and being damaged by the cycle being ridden when the
tyre is only partly inflated.
The said cork ring or core is by preference made in short sections cemented or
otherwise secured together and is also if preferred strengthened by being covered
with canvas or indiarubber tightly wound round or otherwise secured around the
same.
The air chamber of the pnematic tyre may be moulded round the cork core or ring
which latter has been previously chalked or otherwise prepared to prevent the india-
rubber from sticking to it and so as to permit of the subsequent inflation of the
said air chamber.
D
1011 .

page_text: Certain Improvements in Pneumatic Tyres for the Wheels of Bicycles
and other Velocipedes, Motor Cars, and Road Vehicles.
We, FRANK IORNS GIBBS and WILLIAM WRIGHT, trading together as Gibbs &
Wright, of 70 Lower Hurst Street, in the City of Birmingham, Tinplate Workers
and Metal Workers, 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 consists of the herein described improvements in pneumatic
tyres for the wheels of bicycles and other velocipedes motor cars and road
vehicles.
By our Invention a pneumatic tyre is prevented from collapsing when the air
has partly escaped therefrom and is thus prevented from being damaged when
used in a deflated or partly deflated state.
This Invention is applicable to pneumatic tyres of all kinds whether made with
an internal indiarubber air tube and a separate outer covering surrounding the
some or made without a separate internal air tube like what are known as the
"Fleuss" tubeless pneumatic tyres or made as a single tube pneumatic tyre.
We will describe this Invention by referring to the accompanying drawing
on which Fig. 1 is a cross section of what is known as a wired on tyre such for
instance as a Welch-Dunlop with our Invention applied; Fig. 2 is a cross section of
what is known as a Fleuss tubeless pneumatic tyre with our Invention applied;
Fig. 3 is an elevation partly in section of one form of cork ring constructed for
use inside a pneumatic tyre in accordance with this Invention; Fig. 4 is a
sectional elevation and Fig. 5 is a plan of a part of the said cork ring on an
enlarged scale.
The same letters of reference indicate the same or corresponding parts in all
the Figures of the drawing.
In Fig. 1, A is the canvas and indiarubber outer covering of a pneumatic tyre
13 is the interior air tube of the tyre and C is the wheel rim. In the tubeless tyre
shewn by Fig. 2, A is the air tight outer covering or jacket of the tyre, C is the
wheel rim and D) is the indiarubber flap which is fixed to one side of the outer
covering A and lies over the edges of the outer covering to make the air tight
joint..
In carrying out this Invention we provide within the pneumatic tyre a ring E
of cork which extends all round inside the tyre and wheel rim and is made of a
semicircular or somewhat oval shape in cross section and somewhat smaller than
the air cavity in a pneumatic tyre when inflated. This cork ring E does not
prevent the inflation of the pneumatic tyre in the ordinary way nor does it interfere
with the resiliency of the tyre as there is an air space between the periphery of
the cork ring E and the interior of the pneumatic tube so as to allow for the com-
pression of the latter without touching the cork ring E when the tyre is fully
inflated where the tyre comes in contact with the ground. When the tyre becomes
deflated or partly deflated the internal cork ring E forms a support for the walls
of the tyre and thus prevents the same from collapsing and being damaged when
the tyre is ridden only partly inflated.
The cork ring E is by preference made of short cork sections cemented or other-
wise secured together for instance as shewn by Figs. 3, 4 and 5 where the short
sections are marked respectively e their ends being made to engage together and
the cork ring is by preference strengthened by being covered with a strip of
canvas F tightly wound round and cemented to the same. The cork ring E may
be made solid or have transverse holes e¹ formed in it to lighten the same.

page_text: The air chamber B of the pneumatic tyre may if desired be moulded round the
cork core or ring E which latter has been previously chalked or otherwise prepared
to prevent the indiarubber from sticking to it and so as to permit of the subsequent
inflation of the said air tube, or the cork ring can be inserted in the air tube before
the ends of the air tube are solutioned together and before the last two sections
of the cork ring are fixed together as will readily be understood.
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
we claim is:
In the air tube of a pneumatic tyre the employment of a cork ring surrounding
the wheel and made of smaller sectional area than the air space in said tyre when
inflated so as not to interfere with the resiliency of said tyre but to support the
said tyre when deflated or partly deflated substantially as described.
Dated this 20th day of September 1897.
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.