Year: 1899

page_text: I, EMILE POIZOT, of 101, Faubourg St. Denis, Paris, France, Engineer, do
hereby declare the nature of this invention to be as follows:-
The subject of the present invention is a tyre with a helical outer cover, applic-
able to motor cars, carriages, velocipedes, and to all other vehicles running upon
common roads.
This outer cover or protective sheath is placed upon the india rubber or caout-
chouc tyres. Given a tyre of this description solid or hollow, it is covered with
an outer casing formed of independent rings placed together the one against the
other so as to joint, or, according to circumstances of a cord wound helically in
such a manner as to form a protective sheath to the tyre properly so called. This
cord, which may be formed of leather, or of cat gut, is generally woven in the
manner of a textile fibre or firmly twisted. In both cases, before being formed
into the sheath, the cord or the rings are impregnated and covered with a mixture
composed of a solution of caoutchouc or india rubber, of gum lac, of strong glue
or of any gummy or gelatinous substance, in such a manner as to render them
impervious, incontractible, and more resisting, without interfering with the
suppleness or flexibility with which the sheath or outer cover follows all the move-
ments and the deformations of the caoutchouc or india rubber which it covers over
and protects.
Dated this 20th day of March 1800
6 I, EMILE POIZOT, of 101, Rue du Faubourg St. Denis, Paris, in the Republic of
France, 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 subject of the present invention is a tyre with helical carapace or outer
O covering, applicable to motor cars, carriages, velocipedes, and all other wheeled
vehicles running on common roads.
The annexed drawing, which is given by way of example, illustrates one method
of carrying the said invention into practice.

page_text: In this drawing:
Fig. 1, is a section through the felly or rim of a wheel, fitted with the above
mentioned tyre, on a plane passing through the axis of rotation of the wheel.
Fig. 2, is a part view of the same, partly in section on a plane perpendicular to
the axis of rotation of the wheel, and partly in elevation.
On an indiarubber tyre A either solid or hollow is helically wound a cord B
in such a manner as to form a protective outer covering or envelope for the tyre
properly so called. This cord which may be of leather, cat gut, is generally, how-
ever, of textile fibre strongly woven or twisted. In all cases before being placed
upon the indiarubber tyre, the cord is impregnated and coated with a mixture
composed of caoutchouc or indiarubber, gum lac, strong glue, or with any other
gelatinous and gummy substances, in such a manner as to render it impermeable
to moisture, incontractible, and more resisting; without detracting from the
elasticity thereof the possession of which quality admits of the carapace or outer
covering following all the movements and all the deformations of the india-
rubber which it covers and protects.
י
The resisting powers of this outer covering or envelope being greater than that
of the indiarubber it will last for a longer time. On the other hand its price
being only insignificant in comparison to that of caoutchouc or indiarubber, the
saving effected by its use is considerable. It facilitates, moreover starting by
doing away with slipping, and it may be applied to all tyres no matter of what
description. Besides, thanks to this flexible carapace or outer covering, the caout-
chouc or indiarubber which forms the core and the intrinsic value of the tyre, is
capable of lasting for an indefinite period. The cord placed helically upon the
caoutchouc or indiarubber tyre may be replaced by independent rings, placed side
by side and jointed together upon the said tyre.
The tyre thus formed may be secured upon the felly or rim of the wheel of the
vehicle to which it is to be applied, in any known manner.
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. A tyre with a helical carapace or outer covering, applicable to motor cars,
velocipedes, and all wheeled vehicles running upon common roads, characterized
by a leather or cat gut cord, or preferably of textile fibre woven or strongly twisted,
the said cord being impregnated with a mixture consisting of a solution of caout-
chouc or indiarubber, gum lac, and strong glue, or other gummy and gelatinous
substance, and which cord is helically wound upon the tyre properly so called,
hollow or solid, of caoutchouc or indiarubber, for the protection of this latter
and to insure its lasting indefinitely the said cord being capable of being replaced
uy a series of independent rings arranged upon the caoutchouc or indiarubber
tyre and jointed together.
2. A tyre with a helical carapace or outer covering substantially as described
and illustrated.
Dated this 20th day of 1000
J. P. BAYLY,
18, Fulham Place, London, W., Agent for the Applicant.