Protecting shields for inner air tubes as an improvement in all pneumatic tyres.
Year: 1899

page_text: Date of Application, 13th July, 1899
JOSEPH THOMAS WICKS, Ferndale, Tamworth Road, Gravelly Hill, Birmingham,
in the County of Warwick, India Rubber Expert and Factory Manager, do hereby
declare the nature of this invention to be as follows:-
:-
Protecting shields for inner air tubes as an improvement in all pneumatic tyres.
The object of my invention is to manufacture a pneumatic tyre, for wheels,
which shall be cheaper and more durable and far less liable to accidents than
hitherto.
I take mine own improved pneumatic tyre cover, or any other make of cover;
any my own improved inner air tube or the ordinary make of air tube. Between
cover and tube I place a band, pad or shield; this said shield being made or
moulded of a composition consisting for the most part of sulpho oils, with an
addition of a low grade of rubber and other ingredients. Such composition being
vulcanised in moulds or in presses or on cylinders, or in any other convenient
manner. This composition is varied to produce the required degrees of elasticity
and tenacity as on these two properties the utility of these shields largely depends.
The composition consists of from 15 to 25 per cent. of cheap African
rubber, 60 to 75 per cent. of vulcanised sulpho oils, with sufficient
sulphur or sulphurets to vulcanise the compound. A part of the
African or other rubber may be replaced by best cured recovered rubber; and
5 to 10 per cent. of cotton or other fine fibrous matter would sometimes be an
improvement.
Dated the 11th low of Iul 1800
Protecting Shields for Inner Air Tubes of Pneumatic Tyres.
I, JOSEPH THOMAS WICKS, of Ferndale, Tamworth Road, Gravelly Hill, Birming-
ham, in the County of Warwick, India Rubber Expert and Factory Manager, 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 present invention has reference to the manufacture of shields or protectors
for the air-tubes of pneumatic tyres, the object being to cheapen the product,
and increase its durability and wearing properties.
According to this invention, the shield is made or moulded from a composition

page_text: consisting for the most part, of sulpho oils, with the addition of low-grade rubber
and other ingredients.
The sulpho oils, so called, are vegetable oils mixed with sulphur, and are found
on the market as rubber substitutes. The sulphur may be added to the oil
either before or during the compounding of the composition, which may consist
of 75 parts sulpho oils, 15 parts African or other cheap-rubber, and 10 parts of
cotton or other suitable fibre. These proportions may be varied to some extent,
and other ingredients employed, without materially altering the composition;
for instance, a small proportion of recovered rubber may be substituted for some
of the sulpho oil, and the amount of cheap African rubber may be increased.
A little cheap gum (about 5% to 10%), such as Borneo gum, may also be added.
After mixing, which is preferably effected in a roller machine known as a
mixing mill, the composition is "sheeted" through a calender, or squirted through
a tubing machine. Being in a plastic condition, the composition can be readily
moulded into shields or protectors of any suitable form. The shields thus formed
are vulcanized, preferably in moulds, and are applied to the covers or tubes of the
tyres in any convenient manner, and in such a position as to protect the tubes
from external injury.
If preferred, the application of the shields to the covers and tubes may be
effected prior to vulcanization, so that the adhesion may be effected by the
vulcanizing operation.
Shields of this description are found to answer admirably the purpose of pro-
tecting the air-tubes of pneumatic tyres and to be of little cost.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
The application to pneumatic tyres, of protecting shields compounded as above
described from sulpho oils and other ingredients, such as cheap rubber and cotton
fibre, and vulcanized, as set forth.
Dated this lot dow of Doomha
1000