Improvements in Elastic Tyres for Cycle and other Wheels.
Year: 1892

page_text: Date of Application, 26th Oct., 1892
Complete Specification Left, 26th Aug., 1893-Accepted, 30th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Elastic Tyres for Cycle and other Wheels.
I, JOSEPH BEVERLEY FENBY, of Sutton Coldfield, in the County of Warwick,
Civil Engineer, do hereby declare the nature of this invention to be as follows:-
The object of my invention is to make a hollow elastic tyre for cycle and other
wheels which shall have the same advantages as the well known pneumatic tyre
without its liability to collapse by puncturing. I use a hollow rubber tyre which
I keep expanded by internal springs instead of compressed air. These springs may
be of various forms, as for example, springs placed round the rim and having a
wave-like form, that is to say, having the troughs of the waves in contact with the
rim and the tops of the waves keeping the rubber tyre expanded. Or an ordinary
helical spring may be used, being wound round the rim and enclosed in the rubber
tyre.
Dated the L 1
1000
J. BEVERLEY FENBY.
COMPLETE SPECIFICATION.
Improvements in Elastic Tyres for Cycle and other Wheels.
1, JOSEPH BEVERLEY FENBY, of Sutton Coldfield, in the County of Warwick,
Civil 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 :-
The object of my invention is to make a hollow clastic tyre for cycle and other
wheels which shall have the same advantages as the well known puéumatic tyre
without its liability to collapse by puncturing. I use a hollow rubber tyre which
I keep expanded by internal springs instead of compressed air. These springs may
be of various forms, as for example, springs placed round the rim and having a
wave-like form, that is to say, having the troughs of the waves in contact with the
rim and the tops of the waves keeping the rubber tyre expanded.
The accompanying drawings illustrate my invention.
Fig. 1 shews the rim and spring tyre constructed according to my invention.
Fig. 2. shews an enlarged section of Fig. 1, and Fig. 3 shews a cross section
of Fig. 2.
The same letters refer to the same parts throughout the three figures.
e is the rim of the wheel, e the rubber tyre, d d shew the wave-like springs.
Each spring is bent into a wave-like form and fixed as shewn at the point a, the
other end is left free as shewn at b. At cach bearing point on the rim the spring is
held down, but with freedom of movement by a small metal bridge, rivetted through
the rim. The springs are arranged parallel to each other round the rim, but with
different starting points, as shewn in the drawings, so as to present an approximation
to a continuous circular form. On the outer circumference the springs bear upon
a thin metallic, leather or canvas lining fixed to the inner side of the rubber tyre to
save the rubber from cutting. This lining is shewn at f. in Fig. 3. In Fig. 1. three
springs are shewn arranged side by side but with different starting points. On
Fig. 2. there are four springs. In these tyres the springs should be fixed so that
the fixed end of the spring in travelling is in advance of the free end.

page_text: 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 :-
The combination of an outer rubber tyre with a thin lining of metal, leather
or other suitable material and springs of wave-like form as described and
illustrated.
Dated this 24th day of August 180
J. BEVERLEY FENBY.