Year: 1897

page_text: 1, BERNARD HIPPOLYTE CHAMEROY, of Vesinet (Seine et Oise), France, Engineer,
do hereby declare the nature of this invention to be as follows:-
-
According to this invention an elastic tyre of caoutchouc or the like is fixed on
the rim of a wheel and on the periphery of this tyre are fixed separate metallic
segments which roll on the road and while each can yield independently, they
constitute an elastic tread protecting the caoutchouc or like material.
In order to hold the segments and yet permit them to yield, each is made to
bringe over a metal ring which encircles the tyre and is fixed by bolts at intervals
passing through the caoutchouc tyre and rim. This metal ring has its outer side
wider than its inner side, so that it presents on each side at its outer circumference
a continuous projecung lip, and the segments being made of U form to bridge over
the ring have lips inwardly projecting from the limbs of the U, these lips being
engaged under the lips of the ring. The U is made of such depth that each
segment can be pressed some distance inwards that is to say towards the centre of
the wheel. In order to prevent the segments from coming close together, pieces of
wire having their ends hooked to engage under the lips of the ring are interposed
between each segment and the next. In order to prevent the caoutchouc or like
material spreading out laterally at its outer edge, the metal segments have at their
outer sides lips projecting towards the centre, these lips enclosing the outer
periphery of the caoutchouc between them.
ABEL & IMRAY,
Agents for the Applicant.
I, BERNARD HIPPOLYTE CHAMEROY, of Vesinet (Seine et Oise), 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:-
My invention relates to elastic wheel tyres consisting of an annular band of
caoutchouc mounted on the rim of the wheel and covered with separate metallic
segments which constitute the rolling surface and which effectually protect the
caoutchouc band from the destructive action of hard and sharp bodies, without
interfering with the elasticity of the tyre, inasmuch as the said segments, in only
[Price 8d.]

page_text: bearing against the caoutchouc band, readily yield when subject to pressure in
transmitting such pressure directly to the elastic tyre.
My present invention consists in an improved mode of constructing tyres of this
kind, whereby a more perfect action is obtained, and an inexpensive and simple
tyre is produced which can be readily mounted and maintained in good order.
The improved construction is characterised by the fact that the short metal
segments which cover the annular caoutchouc band are secured upon this in
consequence of their engagement under the lateral projecting edges of a metal
ring of suitable section which is fitted in a groove of the elastic band, while
between this ring and the end of the segments is left a free space which affords
a sufficient play in a radial direction to allow of the segments yielding with great
facility under the action of external pressure, and of transmitting such pressure
integrally to the elastic tyre. The connecting ring, which is preferably formed
of several sections placed end to end, is, held in position by a number of bolts, which
pass both through it and through the elastic tyre and wheel rim.
The improved construction of wheel tyre is shewn on the accompanying drawings.
Fig. 1 shews a portion of a tyre and wheel rim partly in side elevation and partly
in section; Fig. 2 shews a cross section to an enlarged scale, and Fig. 3 shews a
perspective view of a portion thereof.
A is the wheel rim, which in this case is assumed to be of metal, and has a
shallow groove in which is seated the tyre B of caoutchouc or other suitable elastic
material.
This tyre has its outer periphery formed with the configuration shewn at Fig. 2.
It will be seen that the middle portion is formed with an annular groove b, into
which is fitted the inner portion of the metal ring C, which has a dovetail shaped
section, or a section of a similar form so as to afford overhanging lateral edges c
on its outer part, beneath which are engaged the inward projecting edges d'
of the side cheeks D¹ of the metal segments D.
These side cheeks are of such a height that there exists between the outer
periphery of the ring C and the inner surface of the heads 1) of the segments, a
space d. On each side of the central groove b, the outer periphery of the tyre and
the under surfaces of the segments are formed so as to it accurately on to each
other, in order to afford the segments a good bearing surface, as shewn at Fig. 2,
where the side cheeks D¹ of the segments are made to fit into annular recesses in
the tyre, formed on the inner side of the projecting edges b¹, which prevent the
lateral displacement of the segments.
The height of the clear space between the inner surface of the segments D and
the ring C is sufficient to allow the segments, when yielding to an external pressure,
to move inwards to the necessary extent without coming in contact with the surface
of the metal ring C. Thus the pressure is transmitted integrally to the caoutchouc
and the elastic action is in no way diminished by the presence of the metal.
In order to prevent the segments from coming in contact with each other and
thus becoming wedged when they are pressed inwards, I interpose between the
contiguous segments round or flat metal wires or bands F placed transversely,
and having their ends bent so as to engage with the overhanging edges of the
ring C. These wires are sufficiently thick for keeping the segments apart so that
they shall not touch each other when pressed inwards.
For facilitating the mounting, the ring C is made of separate sections of any
desired length, which are fixed in position by a suitable number of screw bolts E
passing through them and through the tyre B and rim. A, the heads of these bolts
being sunk into the thickness of the ring C, so as not to reduce materially the
extent of the free space d.
When fitting the parts together, the segments D and the interposed wires F are
slid on to the separate sections of the ring C, the bolts E having first been passed
through the holes thereof, and the sections are then fixed in position on the tyre B.
If the ring is made in one piece, it is formed of a bar bent into circular shape
with the ends butting against each other; the screw bolts E and segments D

page_text: having been fitted thereon (the segments being slid on at the open joint) it is
sprung open sufficiently to allow the screw bolts to be inserted through the holes
in the rubber tyre and rim, and it is then secured in position on the tyre by means
of the screw bolts.
It will be obvious that the above described improved construction of elastic
wheel tyres can be applied in all dimensions to wheels of all sizes and vehicles of all
kinds, whether the rims of the wheels be of metal or of other material.
I am aware that elastic tyres have already been made with metal segments, but
these do not possess the essential features of my invention as above described;
in particular the feature of securing the segments on the elastic tyre by means of
a ring such as C so arranged as to allow a free space d between the ring and the
heads of the segments, whereby, while these are held securely on the ring, they
are afforded the requisite play in a radial direction for enabling them to transmit
the pressure to which they are subjected integrally to the elastic tyre, the metal
ring being secured in position by screw bolts E, of which the nuts are situated
on the inner side of the wheel rim so that the segments can be readily tightened up
against the elastic tyre when required to compensate for the wear thereof.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is :-
1. In an elastic tyre consisting of an annular band of caoutchouc mounted on the
wheel rim and covered with short metal segments, securing the said segments by
causing them to engage with the overhanging edges of a metal ring situated in an
lannular recess in the elastic tyre, the ring and segments being so arranged as to
afford the latter sufficient radial play to enable them to yield freely to external
pressure and to transmit such pressure to the elastic tyre, substantially as
described.
2. In an elastic tyre with metal segments arranged as set forth in the first claim,
constructing the metal ring that secures the segments in separate sections that
are secured to the tyre and rim by means of screw bolts passing through the tyre
and rim and provided with nuts on the inner side of the latter, substantially as
described.
3. In an elastic tyre with metal segments, such as is referred-to in the first claim,
the use for separating the segments from each other, of wires or bands such as F,
substantially as described.
4. The improved construction of elastic tyre with metal segments, combined and
arranged substantially as herein described with reference to the drawing.
Dated thi 95th day of Tonuary 1808
ABEL & IMRAY,
Agents for the Applicant.