Improvements in and relating to Pneumatic Tyres.
Year: 1894

page_text: Date of Application, 1st Jan., 1894
Complete Specification Left, 26th Sept. 1891-Accepted, 27th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvements in and relating to Pneumatic Tyres.
ROBERT SCOTT 168 Croydon Road Newcastle on Tyne do hereby declare the
nature of this invention to be as follows :-
The object of my invention is to effect improvements in my Patents No. 168050
and 4108. The improvements are in connection with the method of attaching
the tyre to the rim and also for increasing the resiliency and speed of the tyre.
In the Patent No. 16805 a ridge of rubber is moulded upon the tread of the tyre,
in the present application the inprovement consists in making a pneumatic ridge.
This is accomplished as follows. An ordinary inner tube and canvas jacket are
employed; to the canvas jacket is stitched a strip of canvas which passes round
the circumference of the tyre, this strip of canvas is secured to the tread of the
tyre and the strip has a cavity in the centre, a tube of pure rubber is placed in
the cavity. This tube may be connected to the ordinary air tube which is inside
of the jacket, or it may be separate. When the latter method is adopted both
air tubes have independent valves.
A strip of rubber is solutioned over the ridge and that portion of the ordinary
jacket which may be exposed outside of the rim. The ridge may vary from a
quarter of an inch to an inch in diameter. By this improvement the tread of the
tyre in contact with the ground is diminished and the resiliency and speed are
increased.
A modification of the pneumatic ridge may be effected by placing an endless
tube of canvas and rubber around the outside of an ordinary pneumatic tyre.
This may be applied to either compound or single tube tyres.
Dated this 30th day of December 1893.
ROBERT SCOTT.
COMPLETE SPECIFICATION.
Improvements in and relating to Pneumatic Tyres.
ROBERT SCOTT 168 Croydon Road Newcastle on Tyne Clerk. I 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 object of my invention is to attach a pneumatic ridge to the cover of an
ordinary tyre, by this means the resiliency is increased, but what is of greater
importance, the part of the tyre which comes in contact with the ground is greatly
diminished and consequently there is less displacement of atmospheric equilibrium
which is usually termed by cyclists as suction, and as a result the speed of the
tyre is increased.
The pneumatic ridge is fixed to the cover of the ordinary tyre as follows. A
strip of canvas is stitched to the ordinary cover, this strip passes round the
circumference of the ordinary tyre and it has a cavity in the centre, in the cavity
is placed a tube of rubber. This tube has a nozzle which passes through a channel
in the ordinary air tube, and the nozzle also passes through the rim. A valve is
attached to the nozzle of the tube of the pneumatic ridge, and it is inflated
independent of the ordinary tyre. The ridge tube may be connected to the air
TD 07

page_text: tube of the ordinary tyre, as is easily understood, when this is done, one valve
inflates both the ordinary air tube and the ridge tube.
Fig. 1 represents a cross section through ordinary pneumatic tyre, and also the
pneumatic ridge, B represents the ordinary tyre and A the pneumatic ridge.
Fig. 2 represents a side view in part section of an ordinary pneumatic tyre
and also pneumatic ridge, and it shews also the method of inflating the ridge.
This is accomplished by connecting the ridge with a tube or nozzle C, which
passes through a channel in the ordinary inner tube of a pneumatic tyre, this
tube C projects through the rim, and is connected with a valve at F.
Fig. 3 represents a modification of attaching a pneumatic ridge to the tread of
the cover of an ordinary tyre. The canvas D is stitched to the canvas A which
forms the cavity containing the rubber tube. The whole as shown in Fig. 3 is
then solutioned to the canvas which forms the ordinary tyre, when this is done, a
thin sheet of rubber is solutioned over the tyre, including the ridge.
Fig. 4 represents a cross section through the channel which connects the valve
to the pneumatic ridge. The means by which the channel is made air tight is as
follows. A small tube intersects the ordinary air tube, this small tube has a
flange at each end, which are solutioned to the outside of the ordinary inner air
tube. A represents the ridge and C the channel and F where valve is attached.
Fig. 5 represents a modification to the foregoing methods. This arrangement
consists in making a groove upon the outside of the rubber of an ordinary tyre
cover. G represents the groove, which receives the pneumatic ridge A. The
ridge in this case is simply a small tube, which consists of canvas and rubber as is
well understood, and the ridge tube is solutioned into the groove of the cover
upon the ordinary tyre. The means of inflating the ridge is the same as already
described and shewn in Figs. 2 and 4.
Fig. 6 represents a method of repairing the pneumatic ridge in case of puncture.
A number of holes are cut in the canvas forming the ordinary tyre and also in the
canvas of the pneumatic ridge. These holes are protected by solutioning a cap of
canvas over them. The rubber tube of the ridge can be drawn out as shewn in
Fig. 6. A represents the tube, and E represents the holes for drawing out the
tube.
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 what
I claim is-
1st. Improvement of a pneumatic ridge.
2nd. Improvements in attaching a pneumatic ridge to the cover of an ordinary
pneumatic tyre, substantially as described and shewn in the accompanying
drawings.
ROBERT SCOTT.