Year: 1897

page_text: Date of Application, 26th June, 1897-Accepted, 31st July, 1897
I, JOSEPH WILLIG, of 23, Rue de la Fidelite, Mulhouse, Alsace, in the German
Empire 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 a protective covering for the inner or air-tubes of
pneumatic tyres, the said covering being designed to prevent the air-tube of a tyre
from being punctured by nails or the like without, however,, lessening the elasticity
of the tyre.
To enable my invention to be fully understood I have illustrated in the accom-
panying drawing as examples two forms of protective covering made according to
my invention:-
In the said drawing,-
Figure 1 is a cross section of a pneumatic tyre provided with my protective
covering:
Figure 2 is a cross section of the protective covering; and,
Figure 3 is a plan of a portion of the same:
Figure 4 is a section shewing the protective covering secured to the outer
rubber covering of the tyre:
Figure 5 is a cross section of a modified form of my protective covering.
In Figure 1, A is the outer india-rubber covering of the tyre, B the india-rubber
inner or air-chamber and C my protective covering, the said covering being
arranged between the outer covering A and the air-tube B. D is the rim to which
the pneumatic tyre is fitted.
The protective covering C consists of two layers of leather formed of a strip
of leather the lateral portions or edges c¹ of which have been bent back upon the
central portion so as to be connected together by their bevelled or chamfered
ends Steel wires E are inserted between the two layers of leather at the
edges of the folded leather band thus formed, the said steel wires serving to secure
the tyre to the rim D and a metal strip F, for instance a thin strip of ordinary steel
or of aluminium steel, is placed between the two layers of leather in the centre
of the folded band.
The surfaces of the two layers of leather which are in contact with one another
are cemented together by means of india-rubber applied as a solution; the wires E,
as also the metal strip F, are secured to the layers of leather by means of rubber
solution and the said wires E with the strip Fare held in position by threads g, g¹
which lace or sew the two layers of leather together. As shewn in Figure 4 the
outer covering A of the tyre is cemented to the protective covering C preferably
by means of rubber solution.
In order to prevent the threads g or the leather layers c, e from being cut by
the sharp edges of the thin metal strip F when the tyre is in use each of the edges
of the said metal strip may be provided with a covering or guard f of brass or
other suitable material, as shewn in Figure 5.
It will be obvious that my protective covering can be applied to any type of

page_text: pneumatic tyre and that tyres having my protective covering can be fitted to
bicycle wheels or to the wheels of any other vehicle. The width of the protective
covering and of the metal strip F may be varied as required.
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. A protective covering for the inner or air-tubes of pneumatic tyres consist-
ing of two layers of leather superposed and formed from a single strip of leather
bent back upon itself and of a metal strip enclosed between the said leather
layers, substantially as described.
2. A protective covering for the inner or air-tubes of pneumatic tyres of the
kind described in claim 1, consisting of a leather strip the lateral portions or
edges of which are bent back upon the central portion cand. are connected
together by their bevelled or chamfered edges, of steel wires E for securing the
tyre to the rim of a wheel the said wires being inserted in the edges of the pro-
tective covering formed by the folded strip of leather and of a central metal strip F
consisting of a thin sheet-steel strip placed between the two leather layers c, el of the
folded strip of leather, the said mictal strip and the steel wires being secured
in position by threads g, g and the two leather layers being cemented to the
metal strip and to one another, substantially as described and illustrated.
1
3. A protective covoring for the inner or air-tubes. of pneumatic tyres of the
kind described in the preceding claiming clauses in which the edges of the metal
strip F are provided with metal coverings or guards adapted to prevent the said
edges of the metal strip F from cutting the threads as described and illustrated.
Dated the 26th day of June 1897
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.