Improvements in and relating to Pneumatio Tyres and Rims therefor.
Year: 1892

page_text: Date of Application, 24th Dec., 1892-Accepted, 28th Jan., 1893
COMPLETE SPECIFICATION.
Improvements in and relating to Pneumatio Tyres and
Rims therefor.
We JOHANNES HOLST, Cycle Agent, and LODEWYK JAN RUTGER HOLST,
Engineer, both of 9 Hemony-Laan, Amsterdam, 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 :-
Our invention relates to an improved method of attaching the cover of a pneumatic
tyre to the wheel rim, and to an improved method of attaching the inflation valve
to the air tube, the object being to enable the cover of the tyre to be easily and
readily removed from or attached to the rim of the wheel for the purpose of
obtaining access to the air tube, and to enable the inflation valve to be readily
attached to or disconnected from the air tube.
We attain this end in the manner illustrated by the accompanying drawing, in
which
Figure 1 is a broken view in longitudinal section showing part of a tyre and rim
embodying our invention.
Figure 2 is a view in transverse section on line x, x, Figure 1, and
Figure 3 is a similar view on line y, y, Figure 1.
Figure 4 is a broken view in plan-partly in section-showing how the ends of
the fixing wires are clamped to the rim.
Throughout these views similar parts are marked with like letters of reference.
The cover A of the tyre is made of rubber reinforced with canvas in the well-
known manner, and it is made tubular in cross section but divided along its inner
circumference. In each edge of the cover A is formed a pocket a in which is placed
a length of wire B having its ends shaped to form hooks 6 and 6', the one hook b¹
being slightly longer than the other and curved as shown by Figure 1 of the accom-
panying drawing. The hooked ends of the wires B pass out of the pockets a
through suitable holes or slits therein.
The rim C of the wheel is preferably of the hollow type, crescent shape in cross
section with a central circumferential groove c. In the concave face of the rim is
a hole c adapted to receive the hooked ends of the wires B, B. By forming the
hook on one end of each wire of the shape shown by Figure 1 of the accom-
panying drawing, the drawing up taut of the wires is facilitated. Through the
hole c¹ in the rim between the hooked ends of the wires B, B, is passed a tubular
stem D having a flanged head d adapted to engage with the ends of the wires B, B,
and when locked down to the rim by the nut d to hold the said wires firmly in the
groove in the rim-which is just wide enough to receive them-and prevent their
displacement.
The air tube E is of the usual construction and it has formed on or fixed to it a
tubular stem e of rubber adapted to fit in the tubular stem D which is tapered from
its outer end. The shank of the valve F-which may be of any suitable type-
is also tapered so that as it is forced into the tubular stem D by the nut d', or by a
separate nut provided for the purpose, it jams the rubber stem e of the air tube E
tightly against the interior of the stem D and thus makes an air-tight joint between
the two parts.
It will be seen that with this construction of tyre, the cover can be very easily
and readily detached from or attached to the rim of the wheel and that the said cover
cannot creep on the rim when it is once fixed thereto. Our improved method of
attaching the inflation valve to the air tube provides a ready means of disconnecting
it therefrom for the purpose of repairing or cleaning the valve without tampering
with the air tube.

page_text: We are aware that it is not broadly new to fix the covers of pneumatic tyres to
the rims of wheels by means of wires and bands, and also that wheel rims have
already been made with central circumferential grooves, and we do not therefore
claim such broadly as our invention, but
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. The improvements in and relating to pneumatic tyres and rims therefor, as
herein before described and illustrated by the accompanying drawing.
2. In a pneumatic tyre the cover of which is attached to the wheel rim by means
of wires or bands, clamping the ends of the said wires or bands to the rim by
means of a tubular stem having a flanged head and adapted to carry the inflation
valvo, as herein before described and illustrated by the accompanying drawing.
3. In a pneumatic tyre, attaching the inflation valve to the air tube by tapering
the shank of the valve to fit in a tapered tubular stem fixed to the wheel rim so as
to compress the rubber tube or mouthpiece of the air tube fitting in the said
tubular stem as the tapered shank of the valve is forced up into the said
tubular stem, as hereinbefore described and illustrated by the accompanying
drawing.
4. In a pneumatic tyre and wheel rim therefor, the combination of a rim having
a central circumferential groove in its concave face; of a cover having pockets
formed in its edges; of wires lying in the said pockets and each having its ends
shaped as hooks to engage with the edges of a hole in the rin; and of a tubular
stem adapted to fit in the hole in the rim between the hooked ends of the wires
carried by the cover and having a flanged head adapted to engage with the ends of
the said wires when the stem is locked down to the rim by a nut provided for the
purpose, as set forth.
5. In a pneumatic tyre and wheel rim therefor, the combination of a rim having
a central circumferential groove in its concave face; of a cover having pockets
formed in its edges; of wires lying in the said pockets and each having its ends
shaped as hooks to engage with the edges of a hole in the rim ; of a tubular stem
adapted to fit in the hole in the rim between the hooked ends of the wires carried
by the cover, having a flanged head adapted to engage with the ends of the said
wires when the stem is locked down to the rim by a nut provided for the purpose,
and a tapered hole to receive the tapered shank of the valve; of an air tube
having a rubber tube or mouthpiece attached to it and adapted to fit in the
tapered tubular stem; and of a valve having a tapered shank adapted to fit in the
tapered tubular stem and engage with and compress the rubber tube or mouthpiece
of the air tube fitting therein, as set forth.
Dated this 24th day of December 1892.
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicants.