Pneumatic Tyres for Cycles.
Year: 1895

page_text: Date of Application, 28th Dec., 1895-Accepted, 22nd Feb., 1896
Pneumatic Tyres for Cycles.
I, PHILIPP REIDEL of Mannheim, Quarter (G. 3. Street) No. 15, County
Baden, Germany, Engineer, do hereby declare the nature of my said invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:—
The pneumatic tyres at present in use are defective in so far, that the com-
pressed air tube protected by the india rubber covering lies directly upon the rim
of the wheel or upon collars or flanges consisting of a more or less hard vulcanised
indiarubber. The compressed air in the indiarubber tube, in which the canvas
is encased cannot possibly exert a springing or elastic action on the hub of the
wheel.
If therefore such a wheel be used on an uneven road, the rider necessarily
Buffers from bumping and jerking and may even be thrown out of the saddle
should he run very rapidly.
A further fault of these pneumatic tyres is the form of the tyre itself, which
on being inflated assumes a circular or nearly circular cross-section form, thus
necessarily offers a greater surface of friction.
The influence of the heat upon the air in the pneumatic tube is not taken in
consideration at all in such tyres. The enclosed volume of air cannot expand,
the strain on the tyre is very great and the latter may soon burst, if allowed to
stand a short time in the sun.
66 a
The object of the invention hereafter described is to remove said defects.
Referring to the accompanying drawings
Fig. 1 shows the tyre in cross-section, "is the covering or tread of the
wheel and is secured to the felloe by means of flanges "a a" which engage with
lateral grooves in said rim. These flanges "a a" extend so, as to form pipes or
tubes semi-circular in cross-section. Such tubes lie over each other as shown.
These tubes are closed by elastic coverings.
Fig. 1 shows the position of the parts on the tyre being inflated. The hollow
extensions " C " and "d" thus form a flexible cushion for the tyre, which latter
then assumes an oval shape and hence reduces the surface of friction and the
power necessary to rotate the driving wheel.
Fig. 2 is a tyre having collars extending to bridges "c" and "d," which as
shown in Fig. 24 lie closely on each other, when the tyre is inflated.
Figs. 3 and 34 show a tyre with a tube "g" between the flat ends "c" and "d"
of the collars "
a a."
Fig. 4 shows a tyre with one collar extended in tubular form while the flat end
of the other lies underneath same.
Fig. 4 shows a tyre by which the one collar is extended so as to form a tube
semicircular in cross-section, while the end of the other collar forms a bridge "d,"
on which said tube lies.
Fig. 5 shows a tyre, by which the ends с " and "d" of the collars lie on each
other in such manner, that the compressed air exerts a springing action on the hub
or nare of the wheel. The ends "c" and "d" should not bend downward so as
to touch the hollow of the rim.
Fig. 5 is a further construction of such a tyre, the one collar "d" extending in
the form of a tube of semicircular cross-section and the flat end of. the other
collar covering said tube.

page_text: Fig. 6 shows a tyre, having a separate pipe or tube "g" under the flat ends of
the collars, the end "c" being above the end "d."
Fig. 6 is a modification of Fig. 6, two tubes of semicircular cross-section and
lying above each other, being provided instead of one.
Fig. 7 is a further modification in which the tube "b6" lies on a strip of
indiarubber and is thus held between the flanges and the rim of the wheel.
Fig. 8 is a modification of Fig. 7 without the indiarubber strip between the
tube "b" and the collars and rim.
Fig. 9 shows another form of tyre, the one collar being extended so, as to form
a pipe "c" semicircular in cross-section while the end of the other collar forms a
bridge "d," which exerts a springing action in the direction of the nave of the
wheel.
Fig. 10 shows a modification of this bridge the flat end of the collar "c" lying
upou such bridge instead of the tube.
Figs. 11 and 12 illustrate the tyres shown in Figs. 4 and 4^ after having been
inflated.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is :-
1. The improvements in pneumatic tyres for cycles and the like, substantially
as and for the purposes described and shown in the drawings.
.
2. In a tyre for cycles, an indiarubber tube (a), one or both ends of which are
formed into either solid or hollow extensions, which are compressed on the tyre
being inflated as and for the purpose substantially as described and shown in
Figs. 1, 14, 2, 2A, 4, 4A, 5, 5ª, 11 and 12.
3. In a tyre for cycles, the arrangement of a tube (g) in the walls (c d) of the
tube (a), substantially as described and shown in Figs. 3, 34.
4. In a modification of the tyre set forth in the foregoing claims, a tube (g) or
two flattened tubes (/) placed below the free ends of the indiarubber tube (a),
substantially as described and shown in Figs. 6 and 6^.
5. In a pneumatic tyre, a tube (bb) encased in a special covering and held
between the flanges of the tube (a) substantially as shown in Figs. 7 and 8.
6. In a modification of the pneumatic tyre described in the foregoing claims,
the providing one collar of the tube (a) with one or more annular spaces, or
suitably cutting part of same away, substantially as described and shown in the
drawing.
PHILIPP REIDEL,
Mannheim, G. 3. 15, Germany, Engineer.