Improvements in Spring Tyres for Cycles and other Vehicles.
Year: 1894

page_text: Date of Application, 23rd Oct., 1894
Complete Specification Left, 23rd July, 1895-Accepted, 19th Oct., 1895
PROVISIONAL SPECIFICATION.
Improvements in Spring Tyres for Cycles and other Vehicles..
ARTHUR WADHAM of No. 171 Queen Victoria Street, in the City of
London E.C. and of No. 2 Cambridge Villas, High Street Teddington in the
County of Middlesex, Engineer do hereby declare the nature of this invention to
be as follows
--
I construct a tyre with springs so arranged as to take up vibration to a larger
or smaller extent and so as to provide for lateral and longitudinal strains.
My tyre consists of a double rim and of various springs and fastenings or
attachments. My inner rim may be made of any suitable shape-preferably of a
section which is shaped in the form of a segment of a circle-the said inner rim
being attached to the spokes of the wheel by any convenient method.
Upon the inner rim I mount a number of springs at suitable intervals round the
tyre. As an alternative I mount the said springs upon strips of suitable material-
preferably of spring metal-the said strips being made fast to the inner rim in any
suitable or convenient way.
The aforesaid springs may be of any convenient shape but I prefer to make them
in the form of a large segment of a circle with a suitable bearing surface where
contact takes place with the inner rim or with the aforesaid strips. As an
alternative I construct my springs in a circular, or elliptical or other rounded
form or 1 construct my spring in one or more pieces of spiral shape or form. My
spring or springs may be of any suitable material or combination of materials and
may be strengthened in a suitable manner either by placing one spring upon
another or otherwise according to the required purpose.
Upon the aforesaid springs I place-preferably in the centre of the periphery-
an outer rim consisting of one or more strips of suitable material. I make the
said outer rim by preference of hollow or channel section so as to secure withiu
it a tread of india rubber or other material but my outer rim may be solid, hollow,
or otherwise in section and the material of which it is made may be either of a
rigid or springy character. My outer rim is attached or held fast to the springs
at intervals round the tyre by any suitable method.
When the work falling upon the tyre is likely to be such as to set up a
considerable longitudinal strain during rotation, 1 overcome the said longitudinal
strain with its attendant tendency to drag the outer rim out of its proper position,
by suitable additional springs arranged diagonally at various suitable intervals
round the tyre between the inner and outer rims.
But any invention may be used with or without the said diagonal springs
Dated this 23rd day of October 1894.

page_text: Improvements in Spring Tyres for Cycles and other vehicles.
I, ARTHUR WADHAM, of 171 Queen Victoria Street, in the City of
London, E.C., and of 2 Cambridge Villas, High Street, Teddington, in the
County of Middlesex, 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 a form of spring tyre so constructed as to take up the
vibration to a larger or smaller extent while the lateral and longitudinal strains
are at the same time duly provided against.
Reference is made to the accompanying drawings, in which like letters indicate
like parts throughout.
Figure 1 shows in side elevation one form of the improved tyre as applied to
a cycle or similar wheel.
'
Figure 2 is a cross section of the same.
Figures 3 and 4 are modifications.
The tyre comprises an inner rim, to which the spokes are attached in any
convenient manner, and an outer concentric rim, which carries a tyre proper
of rubber or other suitable material; these two rims are connected together by
springs of suitable shape and material placed transversely to the rims and at
'convenient distances apart.
As shown in Figures 1 and 2 the inner rim A is of curved cross section, the
spokes B being secured to the concave side in any well-known manner. The
springs. C are attached by bolts and nuts D, rivets screws or the like either
directly to the inner rim A or to a separate strip A' which is in turn securely
rivetted or otherwise fastened to the rim A. Bolts and nuts are however employed
by preference, as a broken or damaged spring can then more easily be replaced.
The tread side of each spring is preferably concave and is secured to an outer
rim E in a manner similar to that by which it is secured to the inner rim, the
concavity of the springs preventing any lateral play or tendency of the spring to
depart from the plane of the wheel.
This outer rim carries a solid or other tyre F of rubber or other suitable
material firmly attached thereto.
The springs C are formed preferably from flat metal strips and may be thickened
so as to give additional strength at points such as C₁ Figure 2.. In order to
provide against the longitudinal strain or "creeping" effect, tangential spokes or
ties G or helical or other springs may be employed being arranged diagonally
between the inner and outer rims as shown in Figure 1.
The inclination of these
spokes from within outwards is in a direction opposite to the direction of rotation
of the wheel, as indicated by the arrows in Figure 1. These spokes G may be
continuations of the spokes B, but are preferably independent being hinged to the
rims to allow of the radial play of the tyre, though the elasticity of the spokes
themselves without the hinges. may be found sufficient to provide for this play.
Additional strength may be given by the use of helical springs arranged radially
between the rims.
In the form shown in Figure 3 the spring C is made, of, a flat strip of metal
shaped as shown, with the ends overlapping at C2 where they are secured by a bolt
and nut J by means of which the spring C is also attached to the outer rim E. The
iuner rim A is in this case an ordinary rim of crescent cross section, to which the
springs C are attached by rivets, bolts and nuts or the like.
In Figure 4 another arrangement is illustrated the ends of the spring C being
overlapped at C' within the inner rim A which is shown of a shape common for

page_text: pneumatic tyres and made of wood, and secured there by bolts and nuts; the
outer rim E is in this case of wood, the tyre F being secured there in any suitable
manner.
In Figures 3 and 4 the rim A is shown recessed for the springs C to lie in
it sufficiently to secure lateral stability.
In Figures 2, 3, and 4 three different forms of the springs C are shown, the form
of the rims also may vary, the outer rim being made to take any kind of tyre
which may be required. The springs C may be of metal or metal in combination
with rubber, and may if desired be covered with leather rubber or other suitable
material. The form of the springs is such as to give resiliency, lateral stability
and general rigidity to the whole tyre.
Suitable packing may be inserted between the springs C and the inner and outer
rims A and E, and the whole may be covered in in any convenient way.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is :-
1. The combination in a spring tyre for cycle and other wheels of an inner and
an outer rim united by transverse springs which are fastened by bolts and nuts
rivets screws or the like in such a manner that the springs are easily renewable
substantially as described and illustrated in the accompanying drawings.
2. In a spring tyre for cycle and other wheels the combination with an inner
and an outer rin of transverse springs C and tangential spokes such as G
substantially as described and illustrated in the accompanying drawings.
3. A spring tyre for cycle and other wheels comprising a rim A into which is
inserted a spring C a second rim of wood hollow metal or the like E secured to C
and a tread F of rubber or the like substantially as described and illustrated in
Figure 4 of the accompanying drawings.
4. A spring tyre for cycle and other wheels comprising a rim A metal strip A
spring Crim E and tread F substantially as described and illustrated in
Figure 2 of the accompanying drawings.
5. In a spring tyre for cycle and other wheels carrying the springs C in a recess
in the rim A for the purpose of securing lateral stability.
6. In a spring tyre for cycle and other wheels forming the tread portion of the
springs C with a recess into which the outer rims fits for the purpose of preventing
lateral play of the spring.
Dated this 23rd day of July 1895.
ARTHUR WADHAM.
Boult & Wade,
Agents for the Applicant.