Improvements in Pneumatic Tyres.
Year: 1893

page_text: Date of Application, 23rd Jan., 1893
Complete Specification Left, 14th Feb., 1893-Accepted, 18th Mar., 1898
PROVISIONAL SPECIFICATION.
Improvements in Pneumatic Tyres.
I, CHARLES LOCK, of No. 3, Dickson Villas, Rutland Road, Upton Park, in the
County of Essex, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to an improved pneumatic tyre and has for its object to
reduce the liability of the air chamber of such tyre being punctured.
In carrying out my invention I form at the centre of the cover at the part
forming the tread of the tyre a protuberance extending entirely around the wheel
and preferably formed hollow and adapted to be inflated or filled with suitable soft
yielding substance or material such as tow, cotton-wool or the like.
In order to afford additional security against puncture I advantageously place
between the air-chamber and the inside of the elastic tube ribbons of steel or other
suitable metal.
The tyre may be fixed to the wheel rim in any suitable manner but I advan-
tageously employ the arrangement forming the subject matter of my application
of even date with this application.
Dated this 23rd day of January 1893.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Pneumatic Tyres.
I, CHARLES LOCK, of No. 3, Dickson Villas, Rutland Road, Upton Park, in
the County of Essex, Engineer, 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 relates to an improved pneumatic tyre and has for its object to
reduce the liability of the air-chamber of such tyre being punctured.
In carrying out my invention I form a protuberance extending entirely around
the tyre and constituting the tread thereof, the said protuberance being hollow and
adapted to be inflated or to be filled with suitable soft yielding substance or
material such as tow, cotton-wool or the like.
In order to afford additional security against puncture I advantageously place
between the air-chamber and the inside of the elastic tube a ribbon of steel or other
suitable metal.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which :-
-
Figure 1 is a longitudinal section of a portion of a wheel having my improved
tyre applied thereto; and,
Figure 2 is a transverse section of the same.
a is the rim of the wheel, b is the tyre, and c is the protuberance forming the
tread of the said tyre, the said protuberance being hollow or tubular.
As shewn in the drawing the tyre is represented as being attached to the rim by
means of wires d, d introduced through the tubular edges of the jacket of the tyre,
but it is to be understood that my improved tyre may be fixed by any other desirable
means.
The hollow space in the protuberance c is as hereinbefore stated either inflated

page_text: or filled with a suitable soft material such as tow, cotton-wool or the like. As
shewn in the drawing it is represented as containing a series of short separate air-
bags or chambers e. The jacket is divided at so that it may be opened out to
introduce the air-bags or filling material and the division is permanently closed by
cementing a piece of canvas or other material over the joint.
g is the ordinary air-chamber, and his the thin steel plate or ribbon introduced
between the said air-chamber and the jacket.
With the arrangement hereinbefore described it will be readily seen that the
possibility of the air-chamber g being punctured is reduced to a minimum and that
if the protuberance c is punctured it will; if filled with wool, tow, or the like, have
no effect thereon whilst if filled with air-bags or chambers, as shewn, it will
only necessitate the removal and replacement of the particular bag or chamber
punctured.
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 :-
A pneumatic tyre the tread of which is composed of a hollow protuberance
inflated or filled with a suitable yielding material, substantially as hereinbefore
described.
15 1400 uay or rebruary 1090.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.