IMPROVEMENTS IN INDIA RUBBER TYRES
Year: 1884

page_text: We CHARLES MOSELEY India rubber Manufacturer and BENJAMIN BLUNDSTONE
Manager both of the Chapelfield Works Manchester in the County of Lancaster
do hereby declare the nature of our invention for IMPROVEMENTS IN INDIA
RUBBER TYRES to be as follows:-
These Improvements relate to India rubber tyres and consist in moulding them
without the usual fin or seam on their largest circumference and in so forming the
wearing surface of the tyre as to reduce its tendency to slip and increase its
duration.
In order to avoid the usual fin or seam upon the outer circumferential half of
the tyre we form the mould in which it is vulcanized in three portions one of
which embraces or includes the outer half of the tyre the other two portions cach
including a quadrant of the inner half of the tyre By this arrangement three fins
or seams may be produced by the joints of the mould and when the tyre is attached
to the wheel they will be covered by the rim.
To reduce the tendency of the tyres to slip when the velocipede or other vehicle
to the wheels of which they may be attached is caused to turn, we mould or
otherwise form projections upon the outer half of the tyre at right angles to the
axis thereof and of such a length that the projections would be included within
the upper half of a square drawn around a section of the tyre Taking the tyre
itself as a cylindrical body a tyre constructed according to these Improvements
might be represented as a cylinder intersected at right angles by a succession of
cylinders, semi-cylinders or prisms the outer or upper surfaces of the tyre, cylinders
semi-cylinders or prisms being all in the same plane and the length of each inter-
secting cylinder semi-cylinder or prism being equal to the diameter of the
intersected cylinder or tyre. The intersecting cylinders, semi-cylinders or prisms
must be limited to the upper or outer portion of the tyre which lies out side the
rim of the wheel.
Dated this 16th day of Sontember A D 1881

page_text: We, CHARLES MOSELEY India-rubber Manufacturer and BENJAMIN BLUNDSTONE
Manager both of the Chapelfield Works Manchester in the County of Lancaster do
bereby declare the nature of our invention for IMPROVEMENTS IN INDIA-RUBBER
TYRES and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :—
These Improvements relate to India-rubber tyres and consist in moulding them
without the usual "fin" or seam on their largest circumference and in so forming
the wearing surface of the tyre as to reduce its tendency to slip and increase its
durability.
'
And in order that this invention may be more readily understood and carried
into practical effect wo have hereunto appended a sheet of Drawings having
marked thereon letters of reference similar letters denoting similar parts in the
various Figures.
In order to avoid the usual fin or seam produced upon the outer circumferentinl
half of the tyre by the joint of the mould in the ordinary method of manufacture,
we form the mould in which the tyre is vulcanized in three portions one of which
embraces or includes the outer half of the tyre the other two portions each including
quadrants of the inner half of the tyre.
Figs 1 and 2 illustrate this part of our Invention.
Fig 1 shows in plan and Fig 2 in section the form in which we prefer to
construct the mould for the purpose of our Invention but we may employ other
arrangements such for example as the equivalent forms shown in Figs 3, 4, 5.
and 6.
In Figs 1 and 2 that part A. A of the mould which includes the outer circum-
ferential half of the tyre is formed in one piece, having an annular semi-circular
recess B for the reception of the outer half of the tyre. Each of the other two
portions C C of the mould form complete circles in plan and each of them is so
shaped that when the three portions of the mould are put together a circular or
equivalent cavity is formed between them corresponding to the form and dimensions
of the tyre as shown in Fig 2 and three longitudinal fins will bo produced all of
which will be upon or within the inner semicircumference of the tyre as indicated
at K K K Fig 2.
In Figs 3 and 4 the inner half of the mould C is a complete circle having a
semicircular cavity formed on its periphery, the outer half is made up of the two
portions A A' in contact with each other at D D and together forming a complete
circle having a semicircular or equivalent cavity B around its inner circumference.
The semicircular or equivalent cavities of the mould when it is put together have
the form and dimensions of the tyro it is proposed to mould.
Figs 5 and 6 show in plan and section a modification of the arrangement
herein before described and illustrated in Figs 3 and 4. The outer half of the
mould is made in a single piece A. and the inner half is divided into three or more
sections C C and C" Fig 5 the divisions or joints between the sections being so
made that one of the sections may be withdrawn in the plane of the mould as
indicated at E E in dotted lines when the other sections may be removed for the
insertion or withdrawal of the tyre. The mould may be made in other equivalent
forms, but the arrangement herein before described and illustrated in Figs 1 and 2
is preferred.
By the hereinbefore described methods of forming the moulds, india rubber tyres
may be produced having their fins or seams K K K in such a position that they
will be covered by the rims of the wheels to which they may be attached.

page_text: To reduce the tendency of the tyres to slip when the velocipede or other vehicle
to the wheels of which they may be attached is caused to turn we mould or
otherwise form projections upon the outer half of the tyre. Fig 7 shows in plan
and Fig 8 in elevation portions of tyres made according to this part of our
Improvements. Figs 9 and 10 are cross sections of Fig 8. The projections L L
are transverse or at right angles to the tyre and of such a length that they would
be included within a rectangular figure bounded by tangents from three points in
the circumference of the tyre 90° apart, the central point being upon the largest
diameter M of the tyre as shown at KL. L K Fig 9. These projections may be of
any desired form but we prefer that they should be semicylindrical, in any case
they must be limited to the upper or outer portion of the tyre.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed we declare that what
we claim is :-
(1) The construction of india rubber tyres in such a manner that the longitudinal
seams or "fins" are approximately upon or within the inner semicircumferences
of the tyres substantially as herein before described and set forth and as illustrated
on the accompanying sheet of Drawings.
(2) In india rubber tyres for velocipedes and other vehicles the use of the pro-
jections formed upon the outer semicircumference of the tyres substantially as and
for the purpose hereinbefore set forth and described and as illustrated on the
accompanying sheet of Drawings.
Dated this thirty first day of December & D 1001