Improvements in or connected with Pneumatic Tires.
Year: 1892

page_text: Date of Application, 15th Dec., 1892
Complete Specification Left, 4th Sept., 1893--Accepted, 7th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in or connected with Pneumatic Tires.
I, JOHN SAMUEL SMITH, of 244, Borough High Street, in the County of
Surrey, Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to pneumatic tires of the kind which are secured to the
wheel by drawing the edges of the cover or jacket over or securing the said edges
to the inner periphery of the rim.
The object of my invention is to provide means for bracing the two sides of the
cover or jacket together against the outer periphery of the rim without at the same
time putting any obstacle in the way of the ready removal of the air chamber.
In carrying out my invention I form inside the cover or jacket two flaps which
when the jacket is in position upon the rim with the air chamber within it occupy a
position between the said air chamber and the rim. The necessary resistance to lateral
movement is advantageously afforded to these flaps by introducing into. a pocket
along the edge of each a band of elastic material which serves to draw the said
edges into the hollow of the rim, and by the pressure exerted by the air chamber
which when expanded serves to press the said flaps firmly between itself and the
rim.
Instead of introducing an elastic band into the edge of each flap I may introduce
it into only one flap the other flap being cemented or otherwise secured to the rim
and in some cases I can dispense with the elastic bands entirely and connect the
edges of the flaps by wires introduced into pockets placed alternately upon the two
edges of the flaps, or I can use cords or wires instead of flexible bands the ends of
the said cords being passed through the rim and suitably connected or secured.
Dated this 15th day of December 1800
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or connected with Pneumatic Tires.
I, JOHN SAMUEL SMITH, of 244, Borough High Street, in the County of
Surrey, 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 :—
My invention relates to pneumatic tyres of the kind which is secured to the wheel
by drawing the edges of the cover or jacket over or securing the said edges to the
inner periphery of the rim.
In the Specification of former Letters Patent granted to me No. 14203 of 1890,
there is described a tyre of the kind to which reference is made above provided
with flaps which served to brace together the two sides of the cover, which sides
were laced together.
The object of my invention is to provide means for bracing the two sides of the
cover or jacket together against the outer periphery of the rim without at the same
time putting any obstacle in the way of the ready removal of the air-chamber, and
readjustment of the air tube and jacket.
In carrying out my invention I form inside the cover or jacket two flaps which,
when the jacket is in position upon the rim with the air-chamber within it, occupy
a position between the said air-chamber and the rim. The necessary resistance to
lateral movement is advantageously afforded to these flaps by introducing into a

page_text: pocket along the edge of each a band of elastic material which serves to draw the
said edges into the hollow of the rim, and by the pressure exerted by the air-
chamber which when expanded serves to press the said flaps firmly between itself
and the rim.
The elastic band or cord used with the flaps provides means for ready removal,
so that the operation of removal and replacement in proper position can be effected
with the utmost facility. The self acting operation of the elastic band or cord
draws the bracing flaps down to the bottom of the groove and so effects the
complete replacement of the jacket and air tube.
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 transverse sectional view of a pneumatic tyre provided with my
bracing flaps; and,
Figure 2 is a sectional view of the cover having flaps, the said cover being
detached from the rim.
a is the rim of the wheel, b the jacket of the tyre, c, c are the bracing flaps and
c', c' are the edges or attachment flaps adapted to secure the tyre to the wheel by
being drawn around the inner side of the wheel rim. These flaps c, c are formed of
canvas or other material firmly connected to the inner side of the jacket and have
in their free edges bands d, d of india-rubber or other elastic material designed
when the tyre is upon the wheel to draw the flaps down to the bottom of the groove
in the rim. When the tyre is upon the wheel and the air-chamber is inflated the
pressure of such air-chamber presses the said flaps into close contact with the rim
of the wheel, as shewn in Figure 1, and thus produces a certain amount of friction
which when augmented by the inward pull due to the contraction of the bands d, d
upon the bottom of the rim serves to prevent the tyre from bulging at that part
immediately adjacent to the rim and so obviates friction upon the air-chamber.
In the drawing the tyre is represented as being secured to the rim by means of
wires in the manner described in the Specification of Application No. 22280 dated
December 5th 1892, Smith, Tate and Tate's, but it is to be understood that my
improved bracing flaps with their elastic cords may be used in connection with
other forms of tyre adapted to be fastened over the inner periphery of the rim.
In order to remove the air-chamber from the rim it is only necessary to disconnect
one edge of the covering and then to draw the bracing flap on one side of the jacket
out of the groove in the rim, this being readily accomplished owing to the elasticity
of the band d. When the tyre is repaired and again introduced into the covering,
the band serves by springing into the bottom of the groove to draw the flap into
its proper position.
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. A jacket or covering for a pneumatic tyre adapted to be fastened over the rim
by attachment flaps and provided with bracing flaps, the edges of which are
furnished with elastic cords, substantially as described.
2. The modification of the jacket above claimed in which one of the bracing
flaps is secured to the rim of the wheel, the other being provided with an
elastic cord so as to serve the purposes hereinbefore referred to, substantially as
described.
3. A jacket or covering substantially of the section shown in Figure 2 provided
with attachment flaps such as c' and bracing flaps elastically corded such as c,
substantially as described.
1 1
1
1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.