Improvements in Pneumatic Tyres for Cycles:
Year: 1897

page_text: Date of Application, 14th Sept., 1897
Complete Specification Left, 5th Jan., 1898-Accepted, 12th Mar., 1898
Improvements in Pneumatic Tyres for Cycles:
We, THEOPHIL PFISTER and EMIL BARTHELS, both of 5, 6 and 7, Liensden Place,
Golden Lane, in the City of London, Manufacturers, do hereby declare the nature
of this invention to be as follows:-
This invention relates to an improved method of fastening the covers of pneu-
matic tyres in position upon the rims of the wheels.
.
According to our invention we provide. the cover (which completely encloses.
the inner inflatable tube) with hooks or studs near one edge constructed to hook
into slots or sockets near the other edge. To form the said slots or sockets we
preferably provide two pieces of metal adapted to be passed through the rubber
of the cover from opposite sides and to be locked together by pressure. The slot
is formed in one of the pieces, the other piece serving as a head or cover plate to
protect the hook or stud, when hooked into the slot, by preventing it from coming
in contact with the rim. The slot is made taper and is widest at the end farthest
from the edge of the cover. When the hooks are hooked into the slots and the tyre.
is inflated, they are drawn to the smaller ends of the slots and are held tight therein.
so that they cannot become detached. When studs are used to engage with the
slots, the heads or enlarged parts of the studs will pass through the wide ends of
the slots but not through the small ends which are only wide enough to receive the
shanks of the studs. It will be understood therefore that when the studs have all
been passed into the slots or sockets, and the tyre is. inflated, the studs will be
drawn to the small ends of the slots and will be locked so that they cannot become
detached until the tyre is deflated. The contraction of the inner diameter of the
tyre caused by inflating the inner tube provides the necessary grip for holding
the tyre on the rim. We sometimes provide the cover with shoulders to sit upon
the edges of the rim.
To keep the tyre from slipping or creeping, one or more hooks may be fastened
on the rim and arranged to lock into corresponding sockets on the tyre.
GEORGE HARRISON,
35, Therapia Road, Honor Oak, London, Agent for the Applicants.
Improvements in Pneumatic Tyres for Cycles.
We, THEOPHIL PFISTER and EMIL BARTHELS, both of 5, 6 and 7, Lensden Place,
Golden Lane, in the City of London, Manufacturers, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be par-
ticularly described and ascertained in and by the following statement:―
This invention relates to an improved method of fastening the covers of pneu-
matic tyres in position upon the rims of the wheels.

page_text: According to our invention we provide the cover (which completely encloses
the inner inflatable tube) with hooks, buttons or studs near one edge to engage
with slots or sockets near the other edge for the purpose of holding the tyre on
the rim. To form the said slots or sockets we find it convenient to provide pieces
of metal adapted to be locked together on opposite sides of the cover. The slots
are formed in the inner pieces; and the outer pieces serve as cover plates which
protect the hooks or studs by preventing them from coming in contact with the
rim.
In the accompanying drawings, we have illustrated how our invention may be
advantageously carried into effect.
Fig. 1 is a perspective view of a portion of the tyre cover shown detached from
the rim.
Fig. 2 is a transverse section of the cover unhooked.
Fige. 3 and 4 are side views of portions of the cover as seen from opposite sides,
and
Fig. 5 is a transverse section of the tyre applied to the rim.
Like letters of reference denote corresponding parts in the several figures.
A is the cover, made of rubber and canvas or other suitable material, and having
a series of studs or the like B secured to it near one edge, and a series of pairs of
plates C near the other edge, the plates being clamped together through the material
of the cover.
The inner plates have slots D formed in them to admit the studs B.
Preferably the slots are made taper or of the shape shown in Fig. 1, the widest
parts being furthest away from the edge of the cover, and the dimensions being
such that the heads of the studs B will pass through the wide parts of the slots
but not through the narrower parts which are only wide enough to receive the
shanks of the studs. To attach the tyre in position, the cover is placed around the
rim F and the edges of it are hooked together by overlapping them and passing
the studs through the slots, the inflatable air tube E being within the cover. Then
the tyre is inflated, thereby swelling out the cover and drawing the shanks of the
studs into the smaller ends of the slots and thus preventing the accidental detaching
or unhooking of the edges. The pressure of the inner side of the cover on the rim
caused by inflating the tyre provides the necessary grip for holding the tyre on
the rim. It is understood that portions of the cover between the plates C are
removed to admit the studs.
We sometimes provide the cover with shoulders to sit upon the edges of the rim,
and if necessary, to ensure that the tyre shall not slip or creep on the rim, hooks
or studs such as G may be fastened on the rim and arranged to lock into cor-
responding sockets in the tyre.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
The construction of a pneumatic tyre with a cover adapted to completely enclose
the inner inflatable tube and having buttons or studs near one edge constructed
to engage with alots near the other edge, substantially as described and for the
Dated this 4th day of January 1898.
GEORGE HARRISON,
35, Therapia Road, Honor Oak, London, Agent for the Applicants.