Improvements in Cycle-rims, and the Means for Holding the Covers of Pneumatic Tyres thereto.
Year: 1895

page_text: Date of Application, 13th June, 1895
Complete Specification Left, 13th Apr.. 1896-Accepted, 13th July, 1896
PROVISIONAL SPECIFICATION.
Improvements in Cycle-rims, and the Means for Holding the Covers
of Pneumatic Tyres thereto.
We, JAMES COTTRELL of No. 26 Mansion House Street Kennington Park
Road, in the County of Surrey, Model Maker, and WILLIAM HEATLEY of
No. 63 Drummond Street, Euston Square, in the County of Middlesex, Builder,
do hereby declare the nature of this invention to be as follows :--
Our invention relates to improvements in cycle rims and the means for holding
the covers of pneumatic tyres thereto and the objects of it are to improve the
grip between the cover and the rim, to facilitate attachment of the cover as well as
detachment of it and access to the pneumatic tube and to prevent the edges of the
rim cutting the cover in the event of the tube becoming deflated.
In carrying the invention into effect, the rim is (when it is made in metal)
Ushaped in cross section, having, preferably, diverging sides. The outer portion
of each side, about a third of it, is bent outwards through about a right angle and
then inwards towards the axis of the rim, terminating in a surface convex to the
axis and of a smaller diameter than the rim at the angle above mentioned as well
as smaller than the concave annular recess between the said surface and the
respective side above mentioned.
The trough between the above mentioned sides is filled with some soft material
such as rubber or hemip, the pneumatic tube and such filling being held together
by cement so as to prevent creeping.
The edges of the cover are thickened by the incorporation therewith of soft
material. Each thickened edge is laid within the concave annular recess above
mentioned which, it is to be noted, has the largest diameter of the rim on that
side of the wheel between it and the ground. The said edges are held in the
recesses in question by a locking ring or rings. The diameter of a locking ring
across the inner edge of it is larger than that across the outer edge of it and of a
sufficient diameter relatively to the smaller diameter of the rim to be capable, of
gripping the thickened edge of the cover between itself and the outwardly bent
outer portion of the rim side.
When the rim is made of wood, the central portion of it is conveniently
solid. We prefer to then form a groove in the face of it to receive the filling
above mentioned. The locking rings are, preferably, of the same material as the
rim itself. But the selection of material does not form part of the present
invention, and any suitable one may be made use of provided that it is capable of
furnishing the relatively different diameters and the general contour of the rim
described above.
Dated this 13th day of June 1895.
PHILLIPS & LEIGH,
Agents for the Applicants.

page_text: Improvements in Cycle-rims, and the Means for Holding the Covers
of Pneumatic Tyres thereto.
We, JAMES COTTRELL of No. 26 Mansion House Street, Kennington Park
Road, in the County of Surrey, Model Maker, and WILLIAM HEATLEY of
No. 63 Drummond Street, Euston Square, in the County of Middlesex, Builder,
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 improvements in cycle rims and the means for holding
the covers of pneumatic tyres thereto and the objects of it are to improve the grip
between the cover and the rim, to facilitate attachment of the cover as well as
detachment of it, to facilitate access to the pneumatic tube and to prevent the edges
of the rim cutting the cover in the event of the tube becoming deflated.
Referring to the accompanying drawing, which is to be taken as part of this
specification and read therewith :-
:―
Figure 1 is a transverse section through the tyre metal rim, and locking rings.
Figure 2 is a transverse section of a wood rim and locking rings.
Figure 3 is a transverse section of a modified form of metal rim with its locking
rings.
Figure 4 is a transverse section of a metal rim and solid rubber band.
Figure 5 is a transverse section of a tyre cover detached.
Figure 6 is a side elevation illustrating the capacity of the present invention for
the cover being in separate sections.
In carrying the invention into effect, the rim a is (when it is made in metal)
Ushaped in cross section, having, preferably, diverging sides. The outer portion a
of each side, about a third of it more or less, is bent outwards through about a right
angle and then inwards towards the axis of the rim, terminating there in a surface a²
convex to the axis and of a smaller diameter than the rim at the angle above
mentioned, as well as smaller than the concave annular recess between the said
surface and the respective side above mentioned.
The trough between the above mentioned sides is filled with some soft material c
such as rubber.or hemp, to protect the inner tube from damage by the rough edge
of the spokes, as shewn in Figure 1.
The edges e of the cover E are thickened by the incorporation therewith of
soft material that will bend but retain its section under strain. Each thickened
edge is laid within the concave annular recess above mentioned which, it is to be
noted, has the largest diameter of the rim on that side of the wheel between
it and the ground. Each said edge is held in the respective recess by a locking
ring D. The diameter of a locking ring across the inner edge of it is larger
than that across the outer edge of it, and is of a sufficient diameter relatively
to the smaller diameter of the rim, to be capable of allowing the thin part of the
cover next to the thickened edge, to pass between them, thus locking the said edge
in the recess formed in the rim, as shewn in Figure 1.
When the rim is made of wood, the central portion of it is conveniently solid, as
shewn in Figure 2. The locking rings D are, preferably, of the same material as
the rim itself. But the selection of material does not form part of the present
invention, and any suitable one may be made use of provided that it is capable of
furnishing the relatively different diameters and the general contour of the rim
described above.
In the case of a cycle built to carry a heavy rider, there is always the risk that
the convex ridge a³ of the rim on each side of the trough which contains the soft
material c, will both be forced down upon the portion of the pneumatic tyre then

page_text: between it and the ground, and cut it. To obviate such tendency to cut, the two
ridges are covered by a solid rubber band F sufficiently thick for that purpose, as
illustrated in Figure 4.
For a very light small tyre the recesses in the rim a may be almost side by side,
as shewn in Figure 3 (thereby omitting the recess and soft material c and providing
a central web c¹).
The absence of circumferential strain on the edges of the tyre cover allows it to
be made in sections / adapted, preferably, to overlap each other, the thickened edges
interlocking at the overlaps Figure 6. Thus damaged sections may be replaced
by good ones and the damaged ones repaired at leisure.
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. A section of rim having the edges or flanges raised from the road.
2. The locking rings fitting inside the rim, as set forth.
3. A tyre cover with the edges curled or turned inwards for the purpose of
clinging to the rim, as set forth.
.4. The combination in a tyre cover of sections, as and for the purpose set
forth.
5. The combination with the rim and the pneumatic tube, of an interposed solid
rubber band, as set forth.
6. The hereinbefore described combination adapted to facilitate the pneumatic
tube being placed, evenly in position before the cover is locked to the rim.
Dated this 13th day of April 1896.
•
PHILLIPS & LEIGH,
No. 22 Southampton Buildings, Chancery Lane, W.C.,
Agents for the Applicants.