Improvements in Pneumatic or Cushion Tyres for Wheels.
Year: 1892

page_text: Date of Application. 7th May, 1892-Accepted, 11th June, 1892
COMPLETE SPECIFICATION.
Improvements in Pneumatic or Cushion Tyres for Wheels.
1, BENJAMIN JOSEPH BARNARD MILLS, of 23 Southampton Buildings, in the
County of Middlesex, Patent Agent, do hereby declare the nature of this invention,
(a communication to me from Jean-Benoit Granjon, of Chatonnay, Isère, in the
Republic of France, Mechanician,) and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement,
reference being had to the accompanying drawings and to the figures and letters
marked thereon :-
The object of the present invention is to provide a metallic lining to cover and
protect the hollow rubber pneumatic or cushion tubes used for the tyres of velocipede
and other wheels.
This protector is represented separately at Figures 1 and 2 of the accompanying
drawing.
Figures 3 and 4 show its application to a wheel.
It consists of an annular band A of caoutchouc or extensible material, upon
which are fixed metallic plates B overlapping each other to the extent of about a
third of their width. These plates, which are of oblong form, are fixed only on
their long axis, which is transverse to the band A, which thus retains all its
elasticity.
The plates B are curved, as shown at Figures 1 and 4, to a radius slightly
larger than that of the tyre, which they are intended to cover; they can be fixed
to the band A by rivets or by stitching; it is preferred however to employ for
this purpose hollow rivets C C, similar to the metallic eyelets employed on garments.
Two rivets placed at the ends of the plate are sufficient to fasten it securely.
The annular protector thus formed, being of a diameter slightly less than that
of the tyre R, shown at Figures 3 and 4, is placed upon the latter with a certain
tension which prevents it becoming displaced whilst, in its turn, it is being covered
with an envelope or running surface D of caoutchouc, or of other material,
strengthened at its centre. This latter envelope is fixed to the felloe J by lacing,
by cement, or by other known means.
The plates B being of steel or other metal, their form can vary from an ellipse to
a rectangle with rounded corners, their curve will be slightly less pronounced than
that of the tyre, and their edges sufficiently rounded to avoid cutting the caoutchouc
upon which they bear.
They can if desired be fixed both to the band A and to the exterior envelope D,
so as to form only a single ring enclosing the metallic protector.
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 :-
A protecting envelope for the tyres of velocipede and other wheels, consisting of
a series of oblong metallic plates B curved according to the curve of the tyre, and
overlapping each other, these plates being fixed on their longitudinal axis only to
an elastic band A covering the tyre R, and covered with an exterior envelope
or running surface D, this latter envelope being capable also of being fixed both
to the metallic plates and to the elastic band A, substantially as herein shown and
described.
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