Improvements in the Construction of Pneumatic Tyres,
Year: 1897

page_text: Date of Application, 31st May, 1897
Complete Specification Left, 28th June, 1897-Accepted, 14th Aug., 1897
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Pneumatic Tyres,
We, WILLIAM KEENE, of 7, King Street, Prescot, in the County of Lancashire,
Mechanic, and THOMAS BERRY, of 7, King Street Prescot, aforesaid, Watchinaker,
do hereby declare the nature of our said invention to be as follows:-
Our invention has for its object improvements in the construction of pneumatic
tyres so as to make them capable of withstanding puncture by nails, thorns or other
sharp or pointed obstacles met with on the roads to which this class of tyres are
exposed without adding materially to the weight and reducing the resiliency.
In carrying our invention into practive we construct our air tube so as to form a
separate space between the tread and the portion of the tyre which contains the air
or gas under pressure and into this space we place a quantity of spongey material
which by preference consists of ground sponge or its equivalent. Our "eecentric"
air tubo may be used with an outer cover in the usual manner or we may cover the
tread with canvas or canvas and rubber so as to form what is known as a "single tube'
tyre.
Uated this 29th day of Mov 1807
"
COMPLETE SPECIFICATION.
Improvements in the Construction of Pneumatic Tyres.
We, WILLIAM KEENE, of 7, King Street, Prescot, Lancashire, Mechanic, and
THOMAS BERRY, of 7, King Street, Prescot, aforesaid, Watch Maker, do hereby declare
the nature of our said invention and in what manner the same is to be performed
to be particularly described and ascertained in and by the following statement:-
Our invention has for its object improvements in the construction of pneumatic
tyres so as to make them capable of withstanding puncture by nails, thorns, or other
sharp or pointed obstacles met with on the roads to which this class of tyres are
exposed without adding materially to the weight and reducing the resiliency.
"
In carrying our invention into practice we construct our air tube so as to form
a separate space between the tread and the portion of the tyre which contains the air
or gas under pressure and into this space we place a quantity of spongy material
which by preference consists of ground sponge or its equivalent. Our " eccentrio
air tube may be used with an outer cover in the usual manner or we may cover the
tread with canvas or canvas and rubber so as to form what is known as a "single tube"
tyre.
In order that our invention may be more clearly understood and easily carried into

page_text: practical effect we have appended hereunto a double sized sheet of drawings upon
which we have illustrated examples of our improved tyre.
Figure is a cross sectional perspective view showing a portion of our single tube
tyre attached to the rim.
Figure 2 is a similar view to Figure 1 showing our tyre attached to the rim by an
outer cover.
.
Figure 3 is a cross sectional perspective view of our air tube or tyre.
In carrying our invention into practice we construct the air tube A so as to form
the space a' between the tread a2 and the portion which contains the air or gas under
pressure as clearly shown at Figure 3 and into this space we place a quantity of
spongy material & which by preference consists of ground sponge or its equivalent as
shown at Figures 1 and 2.
When forming our "eccentric" air tube or tyre so as to be used without an outer
cover or what is known as a "single tube tyre" we form the rubber thicker on the
immediate tread of the eccentric portion of the tyre as shown at Figure 1 and we
prefer to line the interior of the eccentric portion with the canvas a³ or its equivalent.
The tyre may then be fixed to the rim R by cement or in any other manner.
usual valve V is provided for inflating that portion of our tyre which contains the air
or gas under pressure.
The
At Figure 2 we have shown our air tube formed for use in conjunction with the
outer cover B. In this case we pay form the eccentric portion the same thickness as
the portion which contains the air or gas under pressure and we prefer to line this
eccentric portion with the canvas a³ which is afterwards filled with the spongy
material 6. This inner tube or tyre is then secured to the rim R by the outer cover B
which may be held in position by the wires or by any other well known method.
Our eccentric tyre or inner tube may be formed from sheet rubber or it may be
moulded or manufactured in any other manner.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we
claim is
CLAIMS.
First: The improvements in the construction of pneumatic tyres consisting
essentially of the eccentric portion or equivalent space a' filled with a spongy material
in the manner and for the purpose substantially as bercinbefore described and as
shown upon the accompanying sheet of drawings.
Second: In pneumatic tyres forming a space between the portion which contains
the air or gas under pressure and filling the said space with a enang wubstance ab
GEORGE BARKER,
77 Colmore Row, Birmingham, Agent for Applicants.