Year: 1896

page_text: Date of Application, 10th Nov., 1896
Complete Specification Loft 10th Av
1007
Accented
16th Out 1007
I, JAMES GEORGE STIDDER, of 66 Waddon Old Road, Croydon, in the County of
Surrey, Sanitary Engineer do hereby declare the nature of my said invention to
be as follows:-
The object of my invention is to effect improvements in pneumatic tyres for
cycles, motor cars, carriages and other road vehicles, and consists in means for
securing the tyres to the rims or felloes and in means whereby a greater depth of
tyre may be employed.
According to my invention, I make use of extensible cores, in the form of coiled
spring wire, screwed tubes or wires with right and left hand threaded unions or curved
or flat plates in pairs one of each pair being extensible.
In the case of coiled spring wire, the rim is formed with grooves into which similar
ribs or projections on the underside or flaps of the tyre fit, the coiled spring resting
upon the flaps at the lowest portion of the rim. The coiled spring is perfectly
enclosed in a rubber tube, and the tyre may be used with or without an inner air
tube.
In using screwed tubes or wires with threaded unions, the rim is formed with a
projecting curved flange or rib at each side, under which the edges of the cover,
containing the tubes or wires, fit. By extending the tubes by the threaded union
the edges of the tyre are compressed into the recess under the rim flanges and
effectually prevent accidental disengagement.
The flaps or edges of the tyre are in other cases gripped between an inextensible
outer plate an inner extensible plate before being placed in the rim, and with or
without an inner tube, the rim being formed with a detachable side or flange to
secure the tyre in position.
For securing a greater depth of tyre without increasing the width of the tread I
provide an annular tube or ring on each side of the tyre, the tubes being connected
to the rim by spring arms or spokes, and the tyre being formed of one, two or more
air chamber or air chambers and with or without inner inflatable tubes.
Dated 10th November 1906
GEO.
DOWNING,
8 Quality Court, London, W.C., Agent.
COMPLETE SPECIFICATION.
Improvements in and relating to Pneumatic Tyres.
I JAMES GEORGE STIDDER of 66 Waddon Old Road Croydon in the County of
Surrey Sanitary Engineer, do hereby declare the nature of my said invention and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:

page_text: The object of my invention is to offect improvements in pneumatic tyres for cycles,
motor cars, carriages and other road vehicles, and consists in means for securing the
tyres to the rims or felloes and in means whereby a greater depth of tyre may be
employed.
According to my invention, I make use of extensible cores, in the form of coiled
spring wire, screwed tubes or wires with right and left hand threaded unions or curved
or flat plates in pairs one of each pair being extensible.
In the case of coiled spring wire, the rim is formed with grooves into which similar
ribs or projections on the underside or flaps of the tyre fit, the coiled spring resting
upon the flaps at the lowest portion of the rim. The coiled spring is perfectly
enclosed in a rubber tube, and the tyre may be used with or without an inner air
tube.
In using screwed tubes or wires with threaded unions, the rim is forined with a
projecting curved flauge or rib at each side, under which the edges of the cover,
containing the tubes or wires, fit. By extending the tubes by the threaded union
the edges of the tyre are compressed into the recess under the rim flanges and
effectually prevent accidental disengagement.
The flaps or edges of the tyre are in other cases gripped between an inextensible
outer plate and an inner extensible plate before being placed in the rim, and with or
without an inner air tabe, the rim being formed with a detachable side or flange to
secure the tyre in position.
And in order that my said invention may be particularly described and ascertained,
reference is hereby made to the accompanying drawings, in which similar letters of
reference indicate corresponding parts.
Fig. 1 is a section of a pneumatic tubeless tyre secured to the rim by a coiled spring
core or band.
Fig. 2 is a section of a pneumatic tyre secured to the rim by a pair of extensible
cores or bands.
Fig. 3 illustrates a method of securing a segmental core or band to the rim.
Fig. 4 illustrates the application of an inextensible outer band and an extensible
inner band to a pneumatic tyro fitted to a rim of special construction.
Fig. 5 illustrates the application of the method shown in Fig. 3 to wooden
rims.
With reference to Fig. 1, a coiled spring a is used as the extensible core. The
rim c is formed with projections or barbs c¹ or grooves, corrugations or other means
for ensuring a perfect connection with the tyre. In detaching this tyre from the
rim, the coiled spring a is rolled over to the ledge a¹ in the position shown by the
dotted circle. This fedge is formed by a metal wire a in the edge of the ledge or
flap of the tyre and retains the core a until pressure is applied to the side of the
tyre, when the core a again rolls over into the bottom of the rim and grips the two
edges of the tyre therein.
Referring to Fig. 2, the rim c is shown formed with projections or barbs c on the
underside of the flanges of the rim. The outer cover of the tyre is gripped between
these flanges and extensible plates a, or tubes or wires may be used the flanges of
the rim being in such cases, preferably, curved.
In Fig. 3 a method of securing segmental bands a to the rim c is shown, the
segmental baud acting as the extensible band and the rim acting as the inextensible
band. This is effected by providing the segmental bands with screws e and the rims
with threaded sleeves f secured therein, in such a manner that on unscrewing the
aloove, the segments are raised or detached from the edges of the tyre whereby they
are released.
Fig. 4 illustrates a tyre rendered air tight before placing in the rim of special
construction. The edges of the tyre are gripped between an inextensible outer plate &
and an extensible inner plate a, both plates being formed with projections or barbs c
or otherwise roughened as before described. The rim is formed with a detachable
side or flanged attached to the rim c by screws c2; by these means the tyre is readily
attached to or detached from the rim.

page_text: Fig: 5 illustrates the application of the segmental band a to wooden rims.
Inextensible bands 6 are secured to the rim at each side as shown and are formed
with barbs c or otherwise roughened for ensuring a perfect grip between the band a
and the bands b.
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 :-
1. The improved method of securing tyres to rims, substantially as specified.
2. In pneumatic tyres, the application and use of extensible cores, such as a coiled
spring, screwed tubes or wires with right and left hand threaded unions, or curved or
flat plates, with or without barbs or other roughened surfaces, arranged and operating
substantially as herein before described and illustrated by the drawings.
The several constructions of tyres and rims and the modifications of the method
described for securing them together, substantially as hereinbefore described and
shown by the drawings.