Improvements in and relating to Pneumatic Tyres.
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Pneumatic Tyres.
1, WILLIAM BOWDEN, of Barlow Range, Chorlton-cum-Hardy, in the County of
Lancaster, Director, do hereby declare the nature of this invention to be as
follows:-
My invention relates to pneumatic tyres formed or fitted with means for
preventing ready puncturing at the tread or outermost side. Hitherto this has
been effected in a more or less marked degree by inserting in the tread portion of
the tyre metallic tape, extra plies of canvas or compositions of adhesive
substances. Some of these are objectionable because they reduce the resiliency of
the tyre, others because they are not sufficiently durable while some only partly
attain their object. Now the object of my invention is to introduce improvements
in the means hitherto employed for preventing the destructive objects usually met
with upon the road from puncturing the tyres, and so causing the same to collapse by
the escape of the supporting medium usually air under pressure.
My improvements consist in the use and arrangement of the substance known
as asbestos or asbestos-fibre with which I may coat the air-tube when a separate
air-tube is employed, or partly cover the same, or I may line the jacket or cover
forming the tread of the tyre wholly or in part. In some cases! may, in single
tube-tyres form the tyre with an insertion of the substance. In other cases I may
form a pad consisting of a pocket of india-rubber or of other suitable material
stuffed with the asbestos or asbestos-fibre. This pad may be placed between the
air-tube and the jacket and may form an endless band or otherwise.
The asbestos or asbestos-fibre is prepared in the well-known way from the rock
or mineral substance. For the purpose of this invention the mineral is preferably
shredded or scraped into a down or loose fibre and used in the state in which it is
prepared for spinning. The fibre may be mixed with any suitable sticky substance,
and the gritty nature of the fibre may be augmented by mixing the fibre with any
suitable earthy substance in powdered form.
Such material applied in the manner hereinbefore described offers great
resistance to any sharp object especially when the material is compressed, partly
owing to its fibrous and partly to its gritty or mineral nature.
COMPLETE SPECIFICATION.
Improvements in and relating to Pneumatic Tyres.
I, WILLIAM BOWDEN, of Barlow Range, Chorlton-cum-Hardy, in the County
of Lancaster. Director, 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:-
My invention relates to pneumatic tyres formed or fitted with means for

page_text: preventing ready puncturing at the tread or outermost side. Hitherto this has
been effected in a more or less marked degree by inserting in the tread portion of
the tyre metallic tape, extra plies of canvas or compositions of adhesive
substances. Some of these are objectionable because they reduce the resiliency
of the tyre, others because they are not sufficiently durable, while some only
partly attain their object. Now the object of my invention is to introduce
improvements in the means hitherto employed for preventing the destructive
objects usually met with upon the road from puncturing the tyres, and so causing
the same to collapse by the escape of the supporting medium, usually air under
pressure.
My improvements consist in the novel use and arrangement of the substance
known as asbestos or asbestos fibre. This I use preferably in the form of down,
prepared in the well-known way from the mineral rock by scraping or shredding.
In carrying my invention into effect. I build in a layer of the asbestos down or
fibre with the materials of the tyre of jacket thereof, so disposing the fibre that it
shall be interposed between the outer skin or jacket and inner skin or air
chamber, of the tyre. It may be secured in position by first enclosing it in a bag
or pocket, formed with or afterwards attached to the inner side of the jacket. In
some cases enclose it in an independent pocket which is first placed in position
inside the jacket and held there by the inflation of the air-chamber.
Sometimes, in order to prevent the material from clagging or working up into
knots or lumps I mix or spread the fibre with indiarubber in solution or other
suitable adhesive substance.
Such material applied in the manner hereinbefore described offers great
resistance to any sharp object especially when the material is compressed, partly
owing to its fibrous and partly to its gritty or mineral nature.
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. The novel use of loose asbestos or asbestos fibre interposed between the air
chamber or inner lining and jacket or outer skin of pneumatic tyres substantially
as and for the purpose hereinbefore set forth.
2. In a pneumatic tyre the combination with a separate jacket and air-chamber,
of a layer or pad of asbestos down or fibre interposed between the jacket and the
air chamber aforesaid substantially as hereinbefore set forth.
3. The combination with a pneumatic tyre of a layer or insertion of asbestos
disposed between the inner lining and the outer skin of the tyre substantially as
and for the purpose hereinbefore set forth.
Dated this the of November 1001
R. J. URQUHART.
57. Barton Arcade, Manchester, and 5, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.