Year: 1892

page_text: Date of Application, 19th Dec., 1892
Complete Specification Left, 19th Sept., 1893-Accepted, 21st Oct., 1893
air tube can be easily removed, repaired and replaced, when injured. Further, our
improved tyres are of little weight, their manufacture being cheap and simple.
In the accompanying drawing
Figs. 1-3 show sections of a tyre provided with an especial outer cover.
Figs. 4-8 show sections of a tyre with a cover, simultaneously enclosing the air
tube and forming the outer envelope.
The same reference letters indicate the same parts in the figures.
a is the wheel rim.
b is the air tube.
c is the cover fastened in any suitable manner upon the wheel rim a and, if
required, formed of two parts.
d are wire rings situated either in the outer envolope e (Figs. 1 & 2) or in one
edge (Figs. 4 & 5), or in both edges of the cover c (Figs. 6, 7 & 8).
In our improved tyres the air tube b can be easily removed by unwrapping the
cover c, enclosing the air tube and not changed in its position on the wheel rim a,
when it is unfold.
The close of the edges of the cover c is effected by one or two rings of wire,
hemp or other suitable material, situated as above mentioned.
In the construction shown by Figs. 4-8 the cover c is so broad, that the edges,
enclosing the wire rings d, are overlapping.
In Figs. 1-3 the edges of the cover c must be covered by the outer envelope e,
but are not required to overlap, as shown in Fig. 1. The cover c may consist of
simple or double linen and the like and is clothed with rubber at such places, where
it is required.
The effect of our arrangement is as follows:
The diameter of the rings d as well as of the wheel rim a is invariable, in conse-
quence of which the distance between the rim a and the rings d does not change.
Therefore, the rings d cannot be turned in the direction of the arrows shown in the
drawing, so as to limit securely the air tube b on the outside.
At z in Figs. 1, 2 & 4, between the wheel rim a and the rings d, the pressure of
the air tube would effect a transverse bulging of the tyre, if the edges of the
cover c could be drawn forth under the outer envelope e. But the overlapping
rough ends of the linen cover c are so firmly pressed against each other by the
inflated air tube as to prevent any motion.
Plain weaving being employed, hooks and ears or buttons with corresponding
holes and the like, arranged at the ends of the cover c, may replace the friction of
the overlapping edges.
It is apparent from the drawings, that the air tube 7, being evacuated can be
easily removed by unwrapping the cover c (Figs. 3, 5 & 7), whilst the tyre is made
again ready for use by restoring the edges of the cover c and inflating the air tube b.
Dated this 19th day of December 1892
MAX STEKN,
GEORG ROTHGIESSER,
By Geo. H. Rayner,
37, Chancery Lane, London, W.C., Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in and relating to Pneumatic Tyres.
We, Max STERN and GEORG ROTHGIESSER, both of Düsseldorf, in the
Kingdom of Prussia, German Empire, Manufacturers do hereby declare the nature
of this invention, and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement :-
Our invention relates to pneumatic tyres, and has for its object to construct such
a tyre, which when being damaged may be repaired with greatest facility, and
which moreover, shall be of small weight and may be manufactured without difficulty
and for a low price. The special purpose of our improved construction, however, is
to arrange the cover for the air-tube proper in such a manner, that the latter may
be completely freed from the cover without removing the latter from the rim of the
wheel, so that every part of the air-tube is visible, and the same may be displaced
or removed or replaced and may afterwards be covered again in quite a short time.
We are well aware, that covers consisting of one piece, and affording the
possibility of freeing the air-tube wholly, have been made prior to our invention;
these older covers, however, were fixed at their one side to the one side of the rim
of the wheel, and could be secured at their other side to the other side of the rim of
the wheel, so that the latter had to be provided with special parts, as for instance
hooks or eyes, by means of which the connection could be made. Such means for
connection are not required in our construction, in which the middle part of the
strap-like or girdle-like cover is placed on the rim, whilst the two-side-parts of the
cover are laid over the air-tube, one part from the left side, the other part from
the right side, as will be more fully described hereinafter.
Several modes of construction of our new tyre are shown in the drawings sent in
with Provisional Application, in which :
Figs. 1-3 show sections of a tyre provided with an especial outer cover.
Figs. 4-8 show sections of a tyre with a cover, simultaneously enclosing the air-
tube and forming the outer envelope.
Like letters denote like parts throughout the different figures.
a in each figure denoting the concave rim of the wheel, b the air-tube, and c the
cover. The latter is in each case of girdle-like or strap-like shape, and may consist
of but one layer, as in Figs. 1, 2, 3, 6 & 7, or of two layers, as in Figs. 4 and 5.
The middle part of the cover is placed, when single, into the cavity of the rim a, as
shown in Figs. 1, 2, 3, 6 and 7, and when double, embraces the rim at its outer side
as well as at its inner one, as shown in Figs. 4 and 5.
This
In the construction represented in Figs. 1 & 3, the two side-parts of the cover
are of equal breadth (Fig. 1) and when placed against the air-tube, they do not
cover the latter wholly (Fig. 3), but the part, opposite to rim a, remains free.
part of the air tube, as well as the adjoining parts (Fig. 3) of the cover are
surrounded by the outer hoop e, which also consists of india-rubber. The edges of
this hoop are provided with rings d of wire or other suitable material.
Now, as these rings are closed in themselves, their diameter remains constantly
the same, and therefore also the distance between each ring and the rim a remains
unchanged, so that the hoop e is perfectly hindered at any undue movement. As,
now, the tube b is inflated, it presses the middle part and the two side parts of the
cover e firmly against the rim a and the hoop e respectively, and all parts are held
in a perfectly secure and reliable manner.
The outer hoop e may, however, be dispensed with, when the modification shown
in Figs. 6 & 7 is employed. The two outer parts of the cover are somewhat
broader than the corresponding parts shown in Fig. 3, and these parts are now
provided with the rings d, as has been the case with the corresponding rings of the
hoop e in Fig. 1. If now both the said side parts of the cover are laid around the
air-tube, they then will have the position shown in Fig. 6, so that these parts form

page_text: a double layer, thus protecting the inner air-tube in the same manner as
special outer hoop were employed.
if the
of
The same advantage may be had by the employment of the construction shown in
Fig. 8, in which the two side parts of the cover are fixed separately to the rim
the wheel, by means of rivets; the other parts of the construction are the same as
represented in Figs. 6 & 7.
As has been mentioned in the preface, the cover may consist of a double layer.
This modification is shown in Figs. 4 & 5, in which only one ring d is used, which
is arranged at that place where the two layers of the cover are connected.
One of the layers is placed into the concave side of the rim, the other layer is
placed upon the convex side of the rim and both the double side parts are laid
then against or around the inner air-tube in the same way, as has been described
above with regard to the other constructions. As has been already mentioned, the
e, and
pressure of the inflated air-tube presses the cover c against the parts a and
when the cover consists of two layers, these two layers are also pressed against each
other, so that an undue movement of one part of the layer against the other is
perfectly prevented.
-
The same advantage may be had however also with a single layer of cover,
provided, the two extreme side parts are placed one on the other, as shown for
instance in Fig. 2.
If now the air-tube becomes deflated, and if it, in consequence, collapses, as in
Figs. 3, 5 & 7, then the rings or their equivalents may be displaced sideways, and
the side parts of the cover may be easily removed from the air-tube, so that the
latter is free at every point and may be repaired or taken off as desired. If, then
afterwards the air-tube is placed again on the tyre and all the parts are brought
into their proper position, and if the air-tube is then inflated anew, it will cause
again a secure hold between all the parts by reason of the pressure and the air
contained in it.
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 a pneumatic tyre, the combination with the air-tube, of a cover having its
middle part or nearly middle part arranged on the rim of the wheel, the side-parts
of the cover embracing the air-tube, for the purpose as described.
2. In a pneumatic tyre, the combination with the air-tube, of a cover having its
middle part or nearly middle part arranged on the rim of the wheel, the side parts
of the cover embracing the air-tube and overlapping each other, for the purpose as
described.
3. In a pneumatic tyre, the combination with the air-tube, of a cover having its
middle part or nearly middle part arranged on the rim of the wheel, the side parts
of the cover embracing the air-tube and overlapping each other, one or both of the
overlapping parts extending over the rim of the wheel, for the purpose as
described.
4. In a pneumatic tyre, the combination with the air-tube, of a cover having its
middle part or nearly middle part arranged on the rim of the wheel, the side parts
of the cover embracing the air-tube and overlapping each other, one or both edges
of the cover having rings of wire or other material inserted into them.
5. In a pneumatic tyre, the combination with the air-tube, of a cover having its
middle part or nearly middle part arranged on the rim of the wheel, the side-parts
of the cover embracing the air-tube and being covered themselves by an outer hoop,
for the purpose as described.
6. In a pneumatic tyre, the combination with the air-tube, of a cover having its
middle part or nearly middle part arranged on the rim of the wheel, the side parts
of the cover embracing the air-tube and being covered themselves by an outer hoop,
the hoop having rings of wire or other material inserted into its edges, for the
purpose as described.

page_text: 7. In a pneumatic tyre as characterized by Claims 1, 2, 3, 4, 5 or 6, the com-
bination with the air-tube, of a cover consisting of two layers, for the purpose as
described.
8. In a pneumatic tyre characterized by Claims 1, 2, 3, 4, 5 or 6, the com-
bination with the air-tube, of a cover consisting of two layers, the middle part
or nearly middle part of them embracing the rim of the wheel, for the purpose as
described.
9. In a pneumatic tyre, as characterized by Claims 1-8: The combination with
the air-tube, of a single or double cover, the latter being separately fixed to the rin
of a wheel, for the purpose as described.
Dated this 18th day of September 1893.
MAX STERN,
GEORG ROTHGIESSER,
By Geo. H. Rayner,
37, Chancery Lane, London, W.C., Agent for the Applicants.