An Improvement in Pneumatic Tyres.
Year: 1897

page_text: Date of Application, 8th Feb., 1897-Accepted, 17th Apr., 1897
An Improvement in Pneumatic Tyres.
1, FRANCISCO TOMASO TONI, of 169 King Street Sydney, New South Wales,
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 :-
This invention relates to non-puncturable pneumatic tyres for wheels of cycles
and other vehicles. It belongs to that class of such inventions in which a metallic
shield is embedded in the substance of the tyre.
According to this invention, metallic shield plates, each one of which overlaps
the neighboring one, are embedded in the tyre in such a way as to prevent
puncturing through the tread. These plates are each stamped in flexible steel to
the shape they should be normally when the tyre is fully blown up; and they are
so set that they will have sufficient freedom to work with the tyre, and not seriously
affect its elasticity.
"
Referring to the annexed sheets of explanatory drawings,
Fig. 1 is a transverse section through a "single tube tyre shewing the several
layers of which the tyre is constructed cut and pulled apart to illustrate the
structure; Fig. 2 a similar section through the same tyre in working shape, and
Fig. 3 a fragment longitudinal section thereof;
Fig. 4 is a transverse section through a "cover" shewing the several layers cut
and pulled apart; Fig. 5 a transverse section, and Fig. 6 a fragment longitudinal
section through the same in working shape;
Fig. 7 is a fragment plan illustrative of one of the shield plates and its
attachment to the tape.
The shield plates A are made of thin flexible steel which is by preference plated
with some suitable incorrodible metal to prevent oxidation; and are rounded at
the corners to deprive them of any tendency to cut the fabric lying next them.
They are each wide enough to fully protect the tread and are arranged en echelon ;
each one is attached to a fabric tape B by stitching C. The ends of the tape B
are joined to form it into a ring and the ring so made is placed upon and cemented
to the partially finished tyre or cover, and is then covered with india-rubber in the
usual way and the tyre completed; it is thus made to form part of the structure
of the tyre. In some cases the edges of the tape B may be lapped over and the
stitches C put through both thicknesses as indicated in Figs. 4, 5, and 6.
I do not claim broadly the employment of shield plates to protect tyres from
puncturing nor do I claim the placing of such plates en echelon, as I believe that
it has been proposed to use a large number of very small disc plates so arranged.
The structure of the tyre or cover otherwise than as regards the shield plates is
not part of my invention.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
1. Inserting in a pneumatic tyre or tyre cover in the manner set forth curved
flexible shield plates arranged en echelon and each of sufficient width to protect the
tread, as described with reference to the accompanying drawings.
a A

page_text: embedded flexible shield plates sufficient in width to protect the tread, curved to
the required shape and attached en echelon to a tape, as described with reference to
the accompanying drawings.
Dd this 8th day of February 1897
A. M. & WM. CLARK,
53 Chancery Lane, London, 'Chartered Patent Agents.