Improvements in Spring Tyres for Wheels.
Year: 1896

page_text: Date of Application, 18th July, 1895
Complete Specification Left, 15th Apr., 1837-Accepted, 19th June, 1997.
Improvements in Spring Tyres for Wheels.
We, FREDERICK CLENCH, of Lincoln Works, Chesterfield, Engineer, and TяомAS
SCOTT KING, of Stanley Street, Chesterfield, Engineer, both in the County of Derby,
do hereby declare the nature of this invention to be as follows:-
Our invention relates to spring tyres for vehicle wheels and our object is to provide
a spring tyre of great durability for travelling wheels, which spring tyre is so con-
structed as to minimise shock and at the same time avoid absorption of power in the
course of its operation.
Our invention consists in forming a spring tyre of coiled spring of steel or other
sufficiently elastic metal, the metal used for forming such coil being of a suitable
section to cause interlocking. Our tyre consists in fact of a spiral or helical spring in
which each coil interlocks with its neighbour, this interlocking spiral spring being
laid round a suitably shaped rim of a wheel and covered with rubber or other like
material.
In carrying our invention into effect according to one modification we construct a
wheel with a semi-circular concave rim which may be of metal, and may be connected
to the wheel boss by metal spokes. To lay into this concave rim we form a helical
or spiral spring from a ribbon or band of S shaped section, and we so coil this ribbon
or band that the projection of one edge of the ribbon is coiled within the enclosing
recess of the other edge. By so coiling our spring we form a spiral spring with
interlocking edges. This spiral spring we lay round the concave rim of the wheel,
and attach the ends so as to form a continuous circular tyre. Before or after mounting
in position we cover or partly cover our spiral spring tyre with india rubber and
canvas, or other suitable combination to produce a uniformi exterior surface.
The section of ribbon used by us to form our helical spring tyre may be varied in
many ways. Thus the two parts forming opposing S or bent ends may be equal in
dimensions and configuration, or one part of the S may leave a narrower space than
the other part in order to lock more closely to the adjoining coil. The turning part
of the S may be rounded or may be flattened with round edges, or the S may be of
V outline-that is formed of two V's placed together. Other modifications may be
made-thus the locking may be performed without the double S or double V section,
two spiral springs may be coiled, one forms the ribbon of the deep trough section and
the adjoining edges of the trough are connected together by another ribbon of a
similar section so coiled as to link the two edges of the coil together through out its
whole length.
We do not confine ourselves to any particular section, although we consider that
the sections we have given are best suited for our purpose. We may however vary
the section to any desired extent so long as we provide a spring tyre formed of a
coil or spiral laid round the circumference of the wheel, the said coil or spiral being
of such section as to interlock each coil with the other. When we make the oute
spring coil separate from the connecting coil we interlock the two edges of the outer
coil by coiling or screwing within it the inner interlocking coil formed separately.
Other sections may be used for example a D section.
By the use of our invention we produce a tyre of great elasticity and superior
durability, which at the same time is free from all troubles caused in the pneumatic

page_text: Our tyre is applicable generally to vehicle wheels, but we consider it to have
special advantages for the purposes of motor carriages where a really durable and
reliable wheel is very necessary.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
We, FREDERICK CLENCH, of Lincoln Works, Chesterfield, Engineer, and THOMAS
SCOTT KING, of Stanley Street, Chesterfield, 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 :-
Our invention relates to spring tyres for vehicle wheels, and our object is to provide
a spring tyre of great durability for travelling wheels, which spring tyre is so con-
structed as to minimise shock, and at the same time avoid absorption of power in the
course of its operation.
Our invention consists in forming a spring tyre of a coiled spring of steel or other
sufficiently elastic metal, the metal used for formning such coil being of a suitable
section to cause interlocking. Our tyre consists in fact of a spiral or helical spring
in which each coil interlocks with its neighbour, this interlocking spiral spring being
laid round a suitably shaped rim of a wheel and covered with rubber or other like
material.
The accompanying sheet of drawings illustrates our invention according to several
modifications.
Figures 1 and 2 show respectively an elevation and section of a carriage wheel
constructed in accordance with our invention.
Figures 3 and 4 are respectively an end view and cross section of a portion of our
improved spring tyre.
Figures 5 to 11 inclusive illustrate cross sections of different forms of our improved
spring tyre.
In carrying our invention into effect according to one modification we construct a
wheel such as A (Figures 1 and 2) having a semi-circular concave rim B shown
clearly on a larger scale at Figure 3. The rim B may be of metal or other suitable
material, and may be connected to the wheel boss by metal spokes. To lay into this
concave rim B we form a helical or spiral spring C from a ribbon or band of S shaped
section as shown at Figure 4, and on an increased scale at Figure 5; the S sections
being marked D D. We so coil this ribbon or band that the projection E of one
edge of the ribbon is coiled within the enclosing recess F of the other edge; this is
clearly shown in Figures 4 and 5. By so coiling our spring we form a spiral
spring with interlocking edges. This spiral spring we lay round the concave rim B
of the wheel A and attach the ends so as to forin a continuous circular tyre. Before
or after mounting in position we cover or partly cover our spiral spring tyre D with
india-rubber and canvas, or other suitable combination to produce a uniform exterior
surface.
The section of ribbon used by us to form our helical tyre may be varied in many
ways, and a number of these variations are shown in the accompanying sheet of
drawings, Figures 5 to 11 inclusive. The two parts forming the opposing and inter-
locking portions such as G F (Figure 5) may be as shown there, of equal dimensions
and configuration; or the part F of the coil as shown in Figure 10 may be narrower
than the other part G in which case the adjoining coils lock more closely. The

page_text: turning part of the S may be rounded or may be flattened with round edges, as
shown at Figures 6 and 11; or the S may be of V outline, that is formed of two V's-
placed together as shown at Figure 7.
The interlocking may be performed without the double S or double V section..
Two spiral springs may be coiled, one forms the ribbon of the deep trough section,.
while the other forms the interlocking edges to connect these troughs. This method
is illustrated at Figures 8 and 9. At Figure 8 H H are coils of a spiral ribbon
carrying the trough spaces I I, while J is one coil of the second spiral ribbon carrying
the interlocking portion K K. Figure 9 is a simpler form of Figure 8 on which.
I I also denotes the troughs and K K the interlocking portions.
We do not confine ourselves to any particular section although we consider that
the sections we have given are best suited for our purpose. We may, however,
vary the section to any desired extent so long as we provide a spring tyre formed of a
coil or spiral laid round the circumference of the wheel, the said coil or spiral being
of such section as to interlock each coil with the other. When we make the outer
spring coil separate from the connecting coil we interlock the two edges of the
outer coil by coiling or screwing within it the inner interlocking coil formed
separately.
By the use of our invention we produce a tyre of great elasticity and superior-
durability, which at the same time is free from all troubles caused in the pneumatic
tyres by puncturing.
Our tyre is applicable generally to vehicle wheels, but we consider it to have
special advantages for the purposes of motor carriages where a really durable and.
reliable wheel is very necessary.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
1. A spring tyre for the wheels of vehicles consisting of a coiled metallic spring
or springs characterised by the interlocking of the adjacent edges of the coils as set
forth.
2. In a spring tyre for the wheels of vehicles consisting of a coiled metallic spring-
or springs with interlocking edges as claimed in the preceding claim, forming the
coils from metallic ribbon of S section as hereinbefore set forth with reference to the
Figures 3, 4, 5, 6, 7, 10 and 11 of the drawings.
3. In a spring tyre for the wheels of vehicles consisting of a coiled metallic spring
or springs with interlocking edges as claimed in Claim 1 forming the tyre of separate
outer and inner coils or separate coils of trough section so that the outer or the
separate coils are interlocked with the inner coils or separate coils substantially as
herein before set forth with reference to Figures 8 and 9 of the drawings.
Dated thia 15th day of Anril 1807
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicants.