Improvements in or relating to Pneumatic Tyres.
Year: 1898

page_text: Date of Application, 31st May, 1898
Complete Specification Left, 30th Mar, 1899-Accepted, 31st May, 1899
Improvements in or relating to Pneumatic Tyres.
I, THOMAS SLOPER, of 14, The Brittox, Devizes, in the County of Wiltshire, do
hereby declare the nature of this invention to be as follows:-
My invention relates to an improved method of securing the valve to the air
tube of a pneumatic tyre. The method at present employed of passing the valve
through the tube and strengthening the adjacent parts of the air tube by solutioning
on a patch of cloth is not satisfactory as the cloth is liable to stretch and if the
screw clamping the air tube is screwed up too tight the rubber of the tube is
forced outwards where it is clamped and sooner or later leakage of air from the
tube takes place.
Instead of the patch of cloth I prefer to employ a special reinforcing patch ór
disc made in a particular manner so that it cannot draw the air tube away from
the valve and so that however tightly the tube may be clamped the rubber can-
not spread outwards.
For this purpose I employ a ring of metal thread or any suitable material but
preferably metal. This ring is of sufficient size for the stem of the valve to pass
easily through it leaving sufficient clearance. Passing through and extending
outwards from this ring in every direction on the same plane I employ threads
or tapes of cotton or any suitable material. These pass through the ring and
back again either at a tangent or otherwise thus making a flat disc with a hole
through the centre.
When the stem of the valve is passed through the disc the ring has the effect
of transmitting the strain from any one side to the other side of the stem so that
there is no tendency for the rubber of the air tube to be drawn away from the
stem by such tension or strain. I prefer to vulcanize the threads and the ring
together with sufficient rubber to form a satisfactory joint with the air tube to
which they are afterwards solutioned.
The ring prevents the rubber from being squeezed outwards and consequently
much greater pressure can be applied by the clamping screw so that a satisfactory
and permanent joint is obtained.
Canvas may be employed in conjunction with the threads or tapes for forming
the disc or patch or a metal eyelet securely fastened in canvas and vulcanized
with rubber may be employed instead of the before mentioned ring.
It will be obvious that considerable modifications may be made without departing
from the spirit of this invention.

page_text: The
fabric is coiled round to form the inextensible ring A, as shown in Figure 4, and
threads Care drawn through the ring and arranged so as to radiate from it.
threads are solutioned in position with rubber D and the whole is vulcanized.
The complete patch is solutioned or otherwise fastened in position over the hole
in the air tube E.
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:-
1. Reinforcing the valve orifice in a pneumatic tyre with a ring such as A for
the purpose described.
2. In a valve patch for a pneumatic tyre the combination with a ring such as A
of threads radiating from the ring substantially as described.
3. In a valve patch for a pneumatic tyre the combination with a ring such as A
of threads radiating from the ring and lying on both sides of a disc of fabric or
rubber substantially as described.
4. The complete valve patch for a pneumatic tyre substantially as described
and illustrated in Figures 1 and 2 or Figures 3 and 4 of the accompanying draw-
ings.
Tatad this 90th den of M 1800