Improvements in Tyres for Cycle or other Wheels.
Year: 1893

page_text: Date of Application, 18th Apr., 1893-Accepted, 19th Aug., 1893
COMPLETE SPECIFICATION.
Improvements in Tyres for Cycle or other Wheels.
I, FRIEDRICH WIECHARD of 1 and 2 Wolfhagerstrasse, Cassel in the Empire
of Germany, Merchant, 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 has for its object to provide an efficient and durable substitute for
the so-called pneumatic tyres for velocipede wheels which up to the present have
usually proved unreliable because it is impossible to manufacture rubber tubes with
thin walls which shall permanently resist the pressure of compressed air without
mentioning the drawbacks occasioned by riding over sharp or pointed objects which
cause leakage or bursting of the pneumatic tyre. These drawbacks are obviated
by the use of a velocipede wheel tyre which consists of an external covering of
rubber and of hollow bodies which are embedded in said covering and whilst
capable of supporting the weight required are at the same time elastic.
In the accompanying drawings :-
Fig. 1 is an elevation of the felloe showing the lacing of the outer rubber casing
with a radial section through the whole tyre.
Fig. 2 is a longitudinal elevation partly in section of the tyre in which the inner
tyre is composed of celluloid balls and rubber packing pieces.
Fig. 3 is a cross section of the rubber packing pieces of the inner tyre.
Fig. 4 is a longitudinal elevation partly in section through the celluloid tube and
the rubber packing pieces inserted therein.
Fig. 5 is an elevation and section of the outer rubber casing.
A velocipede wheel tyre constructed according to this invention consists essen-
tially of the outer rubber casing and the inner tyre constructed as follows:-
The inner tyre is either composed of celluloid balls and rubber packing pieces in
which case the hollow balls a rest in recessed rubber packing pieces such as b.
Or the inner tyre consists of celluloid tubes and rubber packing pieces then the
rubber packing pieces bare inserted into the celluloid tubes e in such a manner as
to form hollow spaces a' therein of round oval or other suitable shape. The
celluloid tubes are bent accordingly to the periphery of the velocipede wheel and
to the pitch of the same and are closed at one end d in the form of a hemisphere.
Two to three rubber packing pieces may be inserted in each celluloid tube c.
To close the tube a rubber packing piece 6 is inserted in such a manner that the
hemispherical recess on one side of the same serves as a bearing and a packing
piece e for the hemispherical closed end of the next following celluloid tube.
Next to the wheel rim or felloer there is laid a thin rubber strip g having a
canvas core or insertion therein-the object of this is the preventing of any injury
to the celluloid parts of the inner tyre through any spokes s that may have become
loose.
The rubber casing m is rendered strong and durable or lasting by means of a
strip of canvas made thicker at both sides or edges where same meet and by this
means and also by the insertion of brass eyelets the lacing holes are prevented from
tearing open.
Rubber cushions or projections k are cast on the inner surface of the rubber
casing m. These consist of dome shaped recesses of round, oval or angular form
arranged alternately next to one another so that the adjacent recesses f are thereby
formed.
This arrangement has for its object the imparting to the rubber casing m the
crisp resiliency or springiness which is peculiar to a pneumatic tyre. This enables

page_text: the wheel having such tyres applied thereto to glide over small obstacles such as
freshly laid road ballast etc.
The rubber casing m surrounds the parts of the inner tyre and is laced together
tightly on the inside of the felloe of the velocipede wheel-the felloe being also
enclosed.
The present invention provides by this means a velocipede wheel tyre which is
not inferior to the pneumatic tyre as regards lightness and elasticity whilst it
obviates the drawbacks of the pneumatic tyre such as cementing glueing or pasting
or sticking etc. which are inherent more or less to many existing velocipede wheel
tyres up to the present whilst it also has the important advantage that any damaged
part of the tyre can be easily repaired or replaced at small cost.
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. In velocipede wheel tyres the arrangement and combination of the rubber
casing m adapted to be laced together over the felloe of a velocipede wheel-
projections or cushions such as k on its inner surface round oval or angular etc.
dome-shaped recesses of formed by such projections & acting in conjunction with a
number of hollow balls of celluloid and perforated rubber packing pieces which
are hemispherically recessed at each longitudinal end substantially as and for the
purposes hereinbefore described and illustrated in the drawings hereunto annexed.
2. In velocipede wheel tyres the arrangement and combination of the rubber
casing m adapted to be laced together over the felloe of a velocipede wheel-
projections or cushions such as k on its inner surface round oval or angular etc.
dome-shaped recesses of formed by such projections acting in conjunction with
bent or curved celluloid tubes c closed at one end in which are inserted at certain
intervals of distances perforated rubber packing pieces hemispherically recessed
at each longitudinal end substantially as and for the purposes herein before described
and illustrated in the drawings hereunto annexed.
Dated this 18th day of April 1893
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.