Improvements in Wheels for Cycles and similar Vehioles.
Year: 1897

page_text: Date of Application, 9th Dec., 1897-Accepted, 5th Feb., 1898
COMPLETE SPECIFICATION.
Improvements in Wheels for Cycles and similar Vehioles.
We, PAUL FRÖIlica, and RudolLF VON DER LINDE, both of Viersen, in the Rhine
Province, in the German Empire, Manufacturers, 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 improvements in wheels for cycles and similar vehicles
and more particularly to the construction of the rims therefor.
The invention consists in constructing the wheels of such vehicles with two
separate and concentric rims, which are connected and fastened together by means
of springs of any suitable number. By this construction a wheel of great resiliency
is produced, thus obviating the necessity for the use of pneumatic and like tyres
with their inherent drawbacks and disadvantages. The weight of a wheel con-
structed according to this invention will not be greater than that of an ordinary
wheel, so that the invention can be applied to any kind of cycle wheel and in
view of its safety may be most advantageously used in connection with racing
cycles. A further advantage of the invention consists in its adaptability to existing
wheels.
In the accompanying drawings Fig. 1 shows part of a cycle the wheels of which
are constructed with double rims according to this invention.
Fig. 2 is a cross section through the double rim shown in Fig. 1, on an enlarged
scale.
Fig. 3 is a section on the line of Figure 2.
Fig. 4 is a side elevation of a modification of the invention.
The wheel consists of the ordinary inner rim a to which the spokes are fastened
in the usual way. Dished sliding pieces b carrying spiral springs e, are arranged
on the outside of this rim at suitable intervals, varying according to the weight
of the wheel and the vehicle. The other extremities of these spiral springs press
This outer rime may
against cheek plates d, which latter carry the outer rim e.
be fitted with any suitable and desired kind of tyre f. To prevent lateral dis-
placement of the outer rim e a rod or bar g is passed through the coils of each
spiral spring c. These rods or bars 9 are screwed at one end and engage with
nuts or female threaded bosses in the outer rim e and their other ends pass through
holes in the sliding pieces band in the inner rim a.
In the modification shown in Fig. 4 the springs h are made saddle shaped and
the rods g pass through apertures therein. The ends of the springs h are secured
to the inner rim at i. By reason of this construction of wheel rims a resilience
is attained equal to that of wheels fitted with pneumatic or like tyres, and at the
same time side slipping of the outer rim which is fitted with the tyre is prevented
when riding the machine or when turning.
By arranging the springs at small intervals apart it is possible to dispense with
the outer rim e, as in such a case the tyre f of suitable construction may be directly
connected to the cheek plates d.
An accumulation of dirt between the two rims is prevented by reason of the

page_text: constant vibration when riding the machine, and the present invention possesses
the further advantage of combining great resiliency with stability.
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. In wheels for cycles and similar vehicles the arrangement of two rims con-
centric to each other and connected together by springs substantially as described
with reference to the accompanying drawings.
2. In wheels for cycles and similar vehicles of the kind indicated in Claim 1
the arrangement of rods or bars fastened to the outer rim and passed through
holes in the inner rim, around which said rods or bars the springs coil or are
arranged, substantially as and for the purpose hereinbefore described and illus-
trated in the accompanying drawings.
F. W. GOLBY,
36, Chancery Lane, London, W.C., Patent Agent for the Applicants.