Improvements in and relating to Detachable Tyres for Cycles and other Vehicles.
Year: 1895

page_text: Date of Application, 15th June, 1895
Complete Specification Left, 7th Mar., 1896-Accepted, 13th June, 1896
PROVISIONAL SPECIFICATION.
Improvements in and relating to Detachable Tyres for Cycles and
other Vehicles.
I, EMILE ERNEST PICARD, Clerk, of 26 and 27 Bartlett's Buildings, Holborn
Circus, London E.C. in the County of Middlesex do hereby declare the nature of
this invention to be as: follows:-
This system of tyre, as per sketch herewith consists of canvassed indiarubber A.,
having an opening so as to be able to introduce in the interior a rim B, this rim
gives rigidness to the indiarubber and at the same time, it helps to fix the
tightening nuts D, which go across the whole, these nuts are placed between each
spoke of the wheel and maintained in the position E. Once the tyre placed on
the exterior rim of the wheel, the nuts D are screwed up, they are turned half way
so as to place them in the position F and the whole of them are regularly screwed
by the top nuts G so as to obtain the tightening of the inside rim on the outside
rim, operation which has for reason to tighten and maintain the ends of the
iudiarubber.
For light vehicles or carriages, invalid chairs, cycles of all kinds etc., the india-
rubber is given the shape as shown on sketch No. 2 to give more elasticity to the
tyre and lighten the weight.
The inside and outside rims can be made either flat or oval, in wood, metal or
any other kind of material.
Dotad this Fifteenth dex of Iune 1805
Improvements in and relating to Detachable Tyres for Cycles and
other Vehicles.
A communication from A. DUCASBLE, of 75 Boulevard Sèbastopol, Paris,
France, Manufacturer.
I, EMILE ERNEST PICARD, of 26 and 27 Bartlett's Buildings, Holborn
Circus, London, E.C. in the County of Middlesex, Clerk, 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 tyres suitable for the wheels of cycles, invalid chairs,
cabs and other vehicles and to means for securing them upon the wheel felloe or
rims in such a manner that they can be easily put on and taken off, and the
connection of which with the wheel felloes or rims is extremely reliable and, in
particular, is such that the tearing of a tyre at one or more places does not result
in the detachment of the whole tyre.
A tyre according to this invention comprises a thick hollow india rubber ring,
which on the side adjacent to the wheel felloe or rim (hereinafter called the wheel
rim) is open along the whole of its periphery and contains in its internal cavity a
hollow rim or ring of hard elastic material, which is likewise open along its inner
periphery. The wheel rim is provided with screw-bolts, which pass radially
through it and whose heads engage in the cavity of the rubber ring and are so

page_text: formed that they can, by a partial turning movement, be brought into engagement
with the internal elastic ring. The nuts of these screw-bolts are located on the
inner side of the wheel or rim and preferably between the consecutive spokes.
The arrangement is such that if, when the screw-bolts have been inserted into the
wheel felloe or rim, the tyre placed on the periphery of the wheel, and the bolt
heads brought into engagement with the internal elastic ring, the screw nuts be
gradually tightened, the internal ring will be caused to contract in diameter and
press the india rubber ring tightly and firmly upon the wheel rim.
Fig. 1 of the accompanying drawings is a cross section through the rim of a
carriage wheel provided with a tyre and fastening means _ according-to-this
invention;
Fig. 2 a cross section through the rim of a cycle wheel provided with a cushion
tyre according to this invention; and
Fig. 3 is an elevation of one of the screw-bolts employed for securing the tyre
represented in Fig. 1.
The india rubber ring A, which is preferably furnished with a canvas insertion
is formed with a cavity in which is inserted a hollow steel ring B, which is open at
its inner side. This ring B is so arched (Fig. 1) or otherwise formed (Fig. 2) as to
serve as an abutment for increasing the rigidity of the ring A. and also acts as a
support for the tee-shaped heads F of the bolts D. When the tyre is to be
placed upon the wheel rim C, these bolts are, first of all, inserted from the outside
into the wheel rim and the screw-nuts G are then screwed quite loosely on their
inner ends the heads F of the bolts D being so arranged that they will easily pass
into the cavity of the tyre when it is put on. If the tyre, which has a slightly
larger internal diameter than the wheel rim, be now put on, the heads of the bolts
will pass into the cavity of the tyre. By rotating the bolts through 90 degrees,
their heads F, which are formed like double barbs, will be brought transversely
to the inner portion of the ring B, so that upon now screwing up the nuts G, the
ring B can, together with the rubber ring A, be contracted and the tyre firmly and
securely fixed on the wheel, on which it will be permanently held fast.
Although the india rubber ring has been described as furnished with only one
internal steel ring B it will be obvious that two or more of such rings may be
employed, if desired, placed one within another.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
:-
1. A wheel tyre comprising a hollow india rubber ring open on its inner
periphery and provided with an elastic and cut open ring B, which is located
within the india rubber ring and which, by means of the barb-like heads F, of
the bolts D that pass through the wheel rim, can be drawn towards the wheel
rim by the screwing up the nuts G of the said bolts so as to press the india
rubber ring A firmly against the said wheel rim, substantially as hereinbefore
described.
2. A tyre of the kind specified in the proceeding clain, in which the rim or
ring B is so arched or otherwise formed that it serves as an abutment for the
rubber ring A.
3. My improved tyres and securing means constructed and arranged as herein-
before described with reference to and shown in Figs. 1 and 3; and in Fig. 2 of
the accompanying drawings.