Improvements in and relating to Pneumatic Tyres for Bicycle Wheels and the like.
Year: 1898

page_text: Date of Application, 8th Feb., 1898
Complete Specification Left, 7th Nov., 1898-Accepted, 23rd Dec., 1898
PROVISIONAL SPECIFICATION.
Improvements in and relating to Pneumatic Tyres for Bicycle Wheels
and the like.
I, ROBERT WOODALL, of 27, Ipswich Street, Rochdale, in the County of Lancaster,
Engineer, do hereby declare the nature of this invention to be as follows:
It is applicable to pneumatic tyres for bicycle wheels and the like, and has
for its object the easy placing, and the fixing securely, of the tyre upon the rim
of the wheel, without the use of wires or hooks. It consists of one or more grooves
in the thickened portion of the tyre which comes into contact with the rim of the
wheel arranged in such a manner that the pressure of the air pumped into the
tyre shall increase the distance between the edges of the groove or grooves, and
thus force suitable projections on the tyre against the sides of the rim of the
wheel, and in the case of detachable tyres repaired on the inside force the abutting
edges of the tyre against each other."
Dated this 7th day of February 1898.
Improvements in and relating to Pneumatic Tyres for Bicycle Wheels
and the like.
I, ROBERT WOODALL, of 27, Ipswich Street, Rochdale, in the County of Lancaster,
Engineer, 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:-
It has for its object the easy plating in, and fixing securely of the pneumatic
tyre to, the metal (or other) rim of the cycle wheel without the aid of wires, hooks,
or other extraneous apparatus, and is applicable cither to closed tyres, or the class
of tyres which are opened to repair on the inside.
I accomplish this by forming in the part of the pneumatic tyre which is formed
thicker for insertion in the metal rim, one or more longitudinal grooves preferably
approaching to a wedge shape, which are flattened and opened by the inflation of
the pneumatic tyre, compressing the rubber against the sides of the metal rim, and
in the case of an open pneumatic tyre, also compressing the "air joint" of the
tyre.
Referring to the drawings sent herewith:-
Fig. 1, is a cross section (enlarged) of a "closed" pneumatic tyre formed in my
improved manner

page_text: <
Fig. 2, is a cross section (enlarged) of an open" pneumatic tyre formed in
my improved manner.
In Fig. 1, a indicates the closed pneumatic tyre and 6 the metal rim. In the
thickened part 2 of the pneumatic tyre a is formed a wedge shaped groove c
which is flattened when the tyre a is inflated, forcing its lower edges c2 apart and
compressing the sides of the thickened part 2 firmly against the sides 62 of the
metal rim b
In Fig. 2, a indicates the " open" pneumatic tyre and the metal rim. In the
thickened part a 2 of the pneumatic tyre a are formed two wedgeshaped grooves c
one on each side of the airjoint d, which are flattened when the tyre a is inflated,
forcing their lower edges c2 apart, compressing the airjoint d in the centre and
the sides of the thickened part a 2 firmly against the sides 62 of the metal rim b.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
In pneumatic tyres, one or more longitudinal grooves, substantially as described
and shown hereinbefore and in the accompanying drawings, for the purpose set
forth.
1000
JOHN HENRY TOPHAM,
7, South. Corridor, Royal Exchange, Manchester,
Agent to Applicant.