An Improved Pneumatic Tyre for Cycles and like Vehicles.
Year: 1897

page_text: An Improved Pneumatic Tyre for Cycles and like Vehicles.
I, ALEXANDER OGDEN, of 156, Vickery's Chambers, 82, Pitt Street, Sydney, in
the Colony of New South Wales, Contractor, do hereby declare the nature of this
invention to be as follows:-
The object of my invention is to provide an improved pneumatic tyre for cycles
and like vehicles, that will greatly diminish, if not entirely remove the risk of
puncture now so much dreaded by cyclists.
In the construction of my improved pneumatic tyre the air space is reduced by
means of a solid rubber block of somewhat crescent shape placed within the tube in
such a manner that the thickest part of the block will receive all the wear of the
tyre. This block is preferably made as before stated somewhat crescent shaped
but in the widest part of the crescent (namely the centre) it is enlarged and thickened
and through this enlargement I may form a small air tube, or the whole of the
block may be solid.
As the part of the tyre most liable to puncture is that part coming in direct
contact with the roadway my improved tyre being provided with the crescent shaped
block will resist puncture from such as broken glass, tacks, etc. This block may
either be cast with the tube or it may afterwards be inserted and secured by any
suitable means or if desired it may be planted on the outside of the tube.
Dotad this 24th day of August 1897
I, ALEXANDER OGDEN, of No. 12, Temple Court, King Street, late of 156, Vickery's
Chambers, 82, Pitt Street, Sydney, in the Colony of New South Wales, Contractor,
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:
The chiest of the present invention is to provide an improved pneumatio tum for

page_text: the purpose of reducing the liability to puncture, and consists essentially in con-
structing a pneumatic tyre with a rubber (or its equivalent) block or band extending
right round the internal periphery of the tyre; this block or band on one side is
curved to the same radius as the tyre, the other side is shaped like a double crescent,
the two crescents meeting in the centre, and being rounded to meet each other.
this point the block or band is widest, it then curves away each side, to meet the
internal periphery of the tyre.
At
But in order that this invention may be fully understood reference will now be
made to the accompanying sheet of drawings in which :-
Figure 1 is a sectional view of this improved pneumatic tyre.
Figure 2 is a diagrammatic view of the block or band.
Figure 3 is a sectional view of the block or band, attached to an outer cover.
In all figures similar letters are used to denote similar parts.
A is the rim of a cycle having the spoke head B attached thereto. C is the
pneumatic tyre having the block or band D on its internal periphery. EE are the
double crescents, the meeting point F of which is rounded as shewn in the drawings.
G is the air space.
Figure 1 shews a tyre complete in itself, dispensing with the customary inner
or air tube, but this invention may be applied to the ordinary outer cover when
inner air tubes are used (see Figure 3). In the case of the class of tyre shewn in
Figure 1, the block or band D could be constructed with the tyre, but in the case
of outer covers (as Figure 3) it may be either constructed with the outer cover, or
separately and solutioned in afterwards. Should it be desired to lessen the extra
weight caused by the adoption of this invention an opening H, could be made extend-
ing right through the block or band, shewn by dotted lines in Figure 3, but it is
preferable to use the block or band as shewn in Figures 1, and 2.
As puncture usually occurs at or near the tread of the tyre, by placing the block
or band above described, on the internal periphery, or inside the tread, it will greatly
lessen if not entirely remove the liability to puncture.
I am aware that the periphery of pneumatic tyres has been thickened, but this
thickening has had the effect, when the tyre is inflated, of flattening or widening
the tread, and thus cause a greater resistance. By the use of my invention the tyre
when inflated will not have an increased tread owing to the shape of the block or
band inserted; the crescents E, E, permitting of the points I, I, of the block or band
being drawn inwards which would not be the case were the block or band constructed
without these crescents.
I am also aware that a block or cushion has been used in pneumatic tyres on the
side nearest the wheel rim; this has been used more especially to provide in the
case of puncture, a cushion tyre, and thus protect the rim, but does not in any way
lessen the liability to puncture. When my invention is used and the tyre be
deflated, through defective air tube or valve, the rim will be protected, and a cushion
tyre formed by the block or band D, falling in, against the rim.
It will be obvious that a longer life will be given a tyre constructed with my
invention, as the greater part of the thickening, is at the tread. The use of this
invention will not affect the resilient qualities of the pneumatic tyre in any way
whatever, and where a brake is used a. better grip will be obtained when this
improvement is applied.
My invention is applicable to all classes of pneumatic tyres whether used for
cycles, auto-cars, roller road skates, or any class or description of vehicles.
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:
1st. A pneumatic tyre having a block or band as D, on its internal periphery,
substantially as herein described, explained and illustrated in the drawings.
2nd. In outer covers for pneumatic tyres, a block or band as D, on its internal

page_text: periphery, substantially as herein described, explained and illustrated in the
drawings.
Dated this 21st day of December 1897.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.