Improvements in Pneumatic Tyres.
Year: 1896

page_text: Date of Application, 6th Aug., 1896
Complete Specification Left. 6th May. 1897-Accepted, 12th June, 1927
PROVISIONAL SPECIFICATION.
Improvements in Pneumatic Tyres.
I, ADOLPHUS ISIDORE RATH of 13 Theobalds Road, in the County of
Middlesex, Indiarubber Manufacturer, do hereby declare the nature of this
invention to be as follows:-
This invention relates to pneumatic tyres and though it may be used with single
tube tyres it is specially suitable for those having a separate air tube and detachable
cover, and I will describe it as so applied.
In carrying out the invention I may use any suitable rim say for example a plain
crescent, an ordinary Dunlop, or other rim, having a channelled section. The
cover may be formed in the ordinary way, of a canvas or fabric material adapted
to withstand the pressure of the air tube when inflated, and covered with rubber
or otherwise protected and provided at each edge with one, preferably wire hoop,
and one bead or equivalent, both of which are extensible. The bead or enlargement
is formed at the very edge of the cover, and the wire hoop further on the cover so
that when the tyre is in position in the rim the beads of the two edges approxi-
mately meet in the centre of the channel, and the wire hoops lie just inside the
edges of the rim.
The hoops are preferably made of Hookham's spring wire so that they can be
readily pulled over the edge of the rim. The beads may be made of rubber cord
inside the canvas, or a suitable form is to make them of ordinary thick string or
cord divided into sections. Thus both the wire or equivalent hoops and the
beaded edges are sufficiently extensible to be readily placed on or removed from
the rim. Although I prefer to use Hookham's spring wire I do not bind myself to
that material only.
Dated this 6th day of August 1896.
BOULT & WADE,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Pneumatic Tyres.
I, ADOLPHUS ISIDORE RATH, of 13 Theobalds Road, in the County of
Middlesex, Indiarubber Manufacturer, 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 pneumatic tyres, and though it may be used with single
tube tyres it is specially suitable for those having a separate air tube and
detachable cover, and I will describe it as so applied, with reference to the
accompanying drawings in which :-
Figure 1 is a perspective view, partly a transverse section, of a short segment of
a rim fitted with one construction of tyre according to this invention, and

page_text: Figure 2 is a similar view showing an alternative construction of the tyre.
Like letters indicate like parts throughout the drawings.
In carrying out the invention I may use any suitable rim say for example an
-ordinary Dunlop, or other rim, such as the plain crescent rim A, having a
channelled section. The cover B may be formed in the ordinary way, of a canvas
or fabric material B' adapted to withstand the pressure of the air tube C when
inflated, and covered with rubber B2 or otherwise protected and provided at each
-edge with one hoop D, and one bead or equivalent E, both of which are extensible.
The bead or enlargement E is formed at the very edge of the cover, and the wire
hoop D further on the cover so that when the tyre is in position in the rim the
beads E of the two edges approximately meet in the centre of the channel, and the
wire hoops lie just inside the edges of the, rim A. as illustrated.
The hoops D are made of the well-known spring wire such as shown in the
accompanying drawing or in the Specification of Letters Patent No. 3778 of 1886
granted to George Hookham, so that they can be readily pulled over the edge of
the rim. The beads E may be made of rubber cord inside the canvas B', or a
suitable form is to make them of ordinary thick string or cord divided into sections,
in the manner indicated at E¹ on one side of the tyre shown in Figure 1. Thus,
both the wire or equivalent hoops and the beaded edges are sufficiently extensible
to be readily placed on or removed from the rim..
In the tyre shown in Figure 2 the dimensions of the marginal portion of the
cover B are such that when the tyre is in place in the rim they overlap in the centre
of the channel.
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 tliat what I
claim is :-
1. As a means of retaining a pneumatic tyre or cover upon a wheel rim the
combination of one or more complete or divided extensible beads or enlargements
and one or more extensible hoops.
2. A pneumatic tyre or cover, having at each edge a continuous or divided
extensible bead such as E and an extensible hoop such as D further from the edge
but at such a distance that it will lie inside the rim when in position thereon
substantially as described or illustrated in the accompanying drawings.
3. In a pneumatic tyre or cover of the kind described the combination with a
continuous or divided extensible bead such as E of a hoop of spring wire D,
-substantially as described.
4. In a pneumatic tyre or cover the combination with extensible hoops such as D
of beads such as E adapted to overlap each other substantially as described and
illustrated in Figure 2 of the accompanying drawings.
5. The combination and arrangement of parts constituting the complete pneumatic
tyre substantially as described and illustrated in Figure 1 or Figure 2 of the
accompanying drawings.
Dated this 5th day of Anvil 1807
BOULT & WADE,
Agents for the Applicant.