Improvements in Tyres for Velocipedes.
Year: 1890

page_text: Date of Application, 16th Sept., 1890
Complete Specification Left, 15th June, 1891-Accepted, 16th Sept., 1891
PROVISIONAL SPECIFICATION.
Improvements in Tyres for Velocipedes.
I, FRIEDRICH WECK of Cambridge Buildings, John Bright Street, Birmingham
in the County of Warwick do hereby declare the nature of this invention to be as
follows:-
I form my tyre of 2 or more concentric or excentric rings of rubber, the smallest
or internal one of which may or may not be solid. This gives greater adaptability
of the outer ring or "tread" of the tyre to the roughness of the road than if it
were made solid, and at the same time reduces the liability of the tyre to become
pressed flat and protrude beyond the rim of the wheel sideways and thus become
cut as is the case with hollow tyres.
I vary the construction by making the section of the tyre in one piece but with a
horizontal slit, straight or curved, at or near the centre of the tyre, extending
through the central portion of the section and terminating at some distance from
the circumference on each side, preferably by a small enlargement or roundish
hole. This has the same effect of partly separating the outer circumference or
"tread" of the tyre from that portion which is held in the rim of the wheel, and
giving it greater softness.
In order to further avoid risk of cutting I sometimes make the boundary of the
section not quite a circle but thicken it up in the "tread " so as to reduce the
pressure at the sides thus making the section a kind of ovoid.
Dated the 15th day of September 1890.`
COMPLETE SPECIFICATION.
Improvements in Tyres for Velocipedes.
I, FRIEDRICH WECK of Cambridge Buildings, John Bright Street Birmingham
in the County of Warwick 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:-
I form my tyre of two or more concentric or eccentric rings of vulcanized india
rubber the smallest or internal one of which may or may not be solid.
This gives
greater adaptability of the outer ring or tread of the tyre to the roughness of the
road than if it were made solid and at the same time reduces the liability of the
tyre to become pressed flat and protrude beyond the rim of the wheel sideways and
thus become cut as is the case with ordinary hollow tyres.
I vary the construction by making the section of the tyre in one piece but with a
horizontal slit straight or curved at or near the centre of the tyre extending through
the central portion of the section and terminating at some distance from the circum-
ference on each side preferably by a small enlargement or roundish hole. This has
the same effect of partly separating the outer circumference or "tread "of the tyre
from that portion which is held in the rim of the wheel and giving it greater
softness.
I also vary the section of the tyre by making one or more vertical slits or of
slightly oval form on each side of the centre leaving a solid piece of rubber
connecting the upper and lower parts of the tyre so that the whole may be in one
piece and yet give elasticity and firmness when the weight comes on it. In order
further to avoid risk of cutting I sometimes make the boundary of the section not
ID..

page_text: "
quite a circle but thicken it up in the "
"tread so as to reduce the pressure at the
sides thus making the section a kind of ovoid.
The figures on the accompanying drawing will make my meaning more clear.
Fig. 1 shows a tyre in two concentric rings fitted into a rim a, in its natural state
off the ground.
Fig. 2 shows the same tyre (in cross section) on the ground and compressed by
the weight of the machine and rider.
Fig. 3 shows the tyre of 3 concentric rings.
: Fig. 4 the same compressed.
Fig. 5 tyre with a horizontal slit terminating in a roundish hole at each end.
Fig. 6 the same compressed.
Fig. 7 is a tyre slightly thickened up in the "tread" so that the section is more
elliptical and with a curved slit.
Fig. 8 the same compressed.
Fig. 9 is a tyre with 2 vertical slits which practically answers the same purpose
as making it in 2 concentric rings as Fig. 1, inasmuch as it allows the sides of the
tyre to expand sideways without offering any vertical pressure whilst still retaining.
a long range of compressibility as shown in Fig. 10.
Fig. 11 shows a similar tyre with slits of slightly oval form or hollow spaces or
cores and
Fig. 12 shows the same tyre under pressure.
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. The construction of tyres in two or more parts as described.
2. And to make tyres of such a section that there shall be one or more horizontal
or vertical slits or cores as herein described.
Dated this Thirteenth day of June 1891.