Improvements in Closing Leaks in Pneumatic Tyres and other Inflatable Rubber Articles.
Year: 1896

page_text: Date of Application, 11th Aug., 1896
Complete Specification Left, 2nd Apr., 1897-Accepted, 7th Aug., 1897
PROVISIONAL SPECIFICATION.
Improvements in Closing Leaks in Pneumatic Tyres and other
Inflatable Rubber Articles.
We FREDERICK JOSIAH JONES Civil Engineer and GWENDOLIN WEYNTON JONES
Spinster both of Brentwood Stanley Road Kings Heath in the County of Worcester
do hereby declare the nature of this invention to be as follows:-
This invention is a chemical compound, which when distributed over the interior
of pneumatic tyres of cycles and vehicles, or other inflated articles of rubber, closes
up slight leakages, whether arising from porousness of the rubber, or from punctures,
thus rendering the inflated article air-tight. The basis of the invention is the use of
dissolved pyroxylin rendered non hardening by the addition of glycerine, or other
suitable non drying medium such as treacle, to act as a vehicle to hold the dissolved
pyroxylin in suspension. The effect of this invention is that when the compound is
distributed over the interior of the inflated article, a non drying elastic skin is
formed that closes the pores in the rubber or forms a plug in the case of punctures.
The compound consists approximately of-Pyroxylin 10 grains-Amyl acetate 14oz.
-Amylic alcohol 1 oz.-dissolveand mix intimately, Glycerine 12oz. Now although
we find the above proportions suitable in most cases we do not bind ourselves
exactly to them, but may vary the quantities to suit the purposes for which they are
required, and the quality of the ingredients used.
Dated this Elaanth day of inout 1806
FREDERICK JOSIAH JONES.
GWENDOLIN WEYNTON JONES.
Improvements in Closing Leaks in Pneumatic Tyres and other
Inflatable Rubber Articles.
We, FREDERICK JOSIAH JONES, Civil Engineer, and GWENDOLEN WEYNTON JONES,
Spinster, both of Brentwood, Stanley Road, Kings Heath in the County of
Worcester, 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 is a chemical compound which when distributed over the interior
of pneumatic tyres of cycles and vehicles, or other inflated articles of rubber, closes
up slight leakages, whether arising from the porosity of the rubber, or from
punctures, thus rendering the inflated article airtight.

page_text: The basis of the invention is the use of dissolved pyroxyline rendered non-hardening
by the addition of glycerine, or other suitable non-drying medium such as treacle,
a vehicle to hold the dissolved pyroxyline in suspension. Care must
however be taken that the resulting liquid is not harmful to indiarubber. The
effect of the invention is that when the compound is distributed over the interior of
the inflated article, a non-drying elastic skin is formed that closes the pores in the
rubber or forms a plug in the case of puncture. As an example a suitable compound
consists approximately of 10 grains of pyroxyline dissolved in 1 oz. each of amy]
acetate and amylic alcohol and mixed intimately with 12 oz. of glycerine. Now
although we find the above proportions suitable in most cases we do not bind
ourselves exactly to them but may vary the quantities to suit the purposes for
which they are required, and the quality of the ingredients used. Thus the
different solvents of the pyroxyline which may be used would require differing
proportions of the non-drying media.
In carrying out this invention a tyre, for example, is taken and enough of the
compound is introduced into it to cover the entire surface and to leave a small
quantity over in it.
When the tyre is punctured the compound fills up the hole and becomes semi-
solid therein by the evaporation of the solvent.
The air in the article soon becomes saturated with solvent vapour.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. Closing leaks in pneumatic tyres and other inflatable india rubber articles by
introducing into the interior of the articles dissolved pyroxyline rendered non-
hardening by the addition of a non-drying medium.
2. Closing leaks in pneumatic tyres and other inflatable india rubber articles by
introducing into the interior of the article pyroxyline dissolved in amyl acetate and
amylic alcohol with the addition of glycerine, treacle or the like.
F. J. JONES.
G. W. JONES.