Improved Device for Fixing Pneumatic Tyres on the Wheels of Bicycles, Tricycles, and the like.
Year: 1893

page_text: Date of Application, 24th Nov., 1893-Accepted, 10th Feb., 1894
Improved Device for Fixing Pneumatic Tyres on the Wheels of
Bicycles, Tricycles, and the like.
A communication by the Firm of MARCUS & Co., of 48, Dachauerstrasse, Munich,
in the Empire of Germany, Bicycle Manufacturers.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool and 6, Bank Street,
Manchester, both in the County of Lancaster and 323 High Holborn, in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this inven-
tion 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 pneumatic tyres, and has for its object a fastening
device characterised by the extreme facility with which the tyre may be removed
from the rim and again replaced or changed, even by an unskilled person.
As shown in cross section in Figures 1, 2 and 4 of the accompanying drawing, it
consists of an air tube a and an outer covering b. The latter, the edges of which,
as shown in Figure 2, enclose a wire, or like, ring c, is preferably attached at one
side to the rim, by means of rivetting or cementing. The rim consists of two parts,
a fixed one d which receives the spokes, and a removable one e; this latter forms
that part of the rim which lies opposite the part to which the cover is attached,
and consists of an open ring of the shape shown in Figure 3, which ring is simply
placed round the fixed part of the rim d; the two ends of the open ring are then
connected in some suitable manner. As shown in the drawing, one end of the ring
engages by means of a pin or the like,, in a suitable slot or the like in the other
end, whilst the pressure of the inflated air tube both secures the connection, and
also presses the removable part of the rim e against the fixed part, or holds the
former on the latter. The free edge of the covering is gripped between the air
tube and the removable part of the rim, and thus, in this way, retained, Figure 2.
If the tyre is to be taken off, the valve of the air tube is merely opened and the
latter emptied. The loose ringe of the rim, after its fastening has been released,
may be then drawn down, as shown in Figure 1. It is then possible to remove the
wired edge of the tyre the air tube being deflated & the loose ring e removed by
simply drawing it over the lower edge of fixed tyre d. The air tube may then be
taken out. If the tyre is to be fastened on the rim, the operation is reversed, the
air tube is first passed under the cover, and then the loose edge of the cover is
inserted in the rim, and afterwards the loose ring e is placed between the rim and
the free edge of the cover. When the two ends of the loose ring e have been
suitably connected, the air tube is inflated and the tyre is held absolutely firm.
Fig. 4 is simply a modified form of Figure 2, c being a band of any suitable
material instead of wire enclosed by edges of tyre.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, as communicated to me
by my foreign correspondents, I declare that what I claim is :-
An improved device for fastening pneumatic tyres on the wheels of bicycles and
the like, consisting of a rim divided into two parts, d and e, the fixed one, d, being
firmly attached to one edge of the covering of the air tube, whilst the other free
edge, which encloses a wire or like ring, rests against the removable second part e
of the rim, the latter consisting of an open ring e, which, in consequence of the

page_text: pressure of the inflated air tube, is pressed against the fixed part d of the rim and
retained on the same,' substantially as described and shown on the accompanying
drawing.
Dated this 23rd day of November 1893.
WM. P. THOMPSON & Co.,
Agents for the Applicant."