Improvements in or relating to Pneumatic Tyres.
Year: 1899

page_text: Date of Application, 13th Oct., 1899
Complete Specification Left, 13th July, 1900-Accepted, 18th Aug., 1900
Improvements in or relating to Pneumatic Tyres.
We, JAMES JELLEY, Manager, and HERBERT JELLEY, Works Manager, both of
Hillcross, Coventry, in the County of Warwick, do hereby declare the nature
of this invention to be as follows:
This invention relates to pneumatic tyres such as those described in our
previous Specification No. 15335 of 1898, in which the overlapping edges are
strengthened by zigzag wires. The present invention relates to these zigzag
wires and the manner of applying them.
In carrying out the present invention we provide one edge of the tyre or
tyre cover with a zigzag or crinkled wire which strengthens it, and we prefer-
ably curve or bend this strengthened edge so that it presents a convex surface
upwards when lying in the rim. The second edge of the tyre or cover we form
double like two flaps one above the other, each strengthened with the zigzag
wire and leaving a space between the two into which the strengthened edge of
the other side of the cover can be inserted, a similar curvature being imparted
to all three strengthened edges, so that the single edge is in effect nipped between
the double one, or the two edges, and cannot be withdrawn by pulling them
straight apart, a certain amount of radial movement being necessary to free
them.
We prefer to make the double edge of a single piece of wire, that is to say,
the same wire is bent successively so as to form the zigzags of both flaps upon
one edge of the cover. A convenient winding of the wire would be as follows:-
The wire having been bent to form one zigzag of say the lower flap would
then rise in a sharp bend so as to form the outward limb of one of the loops of
the upper flap it would then be turned round substantially at right angles and
in the plane of the loop and then back again returning parallel to the first limb,
then sharply downwards and outwards so as to form an outward limb of the
lower flap, then round the loop and back again as in the upper flap and then
bent again to enter the upper flap and so on throughout the whole length. The
loops of one of the flaps may extend somewhat farther outwards than those of
the other flap if desired.
Additional unstrengthened flaps. may be employed if desired.
BOULT, WADE & KILBURN,
Agents for the Applicants.
Improvements in or relating to Pneumatic Tyres.
We, JAMES JELLEY, Manager, and HERBERT JELLEY, Works Manager, both of
Hillcross, Coventry, in the County of Warwick, do hereby declare the nature
Price 8d.1

page_text: 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 such as those described in our
previous Specification No. 15335 of 1898, in which the overlapping edges are
strengthened by zigzag wires. The present invention relates to these zigzag
wires and the manner of applying them.
'
In carrying out the present invention we provide one edge of the tyre
cover with a zigzag or crinkled wire which strengthens it, and we preter-
ably curve or bend this strengthened edge so that it presents a convex surface
upwards when lying in the rim. The second edge of the tyre or cover we form
double like two flaps one above the other, each strengthened with the zigzag
wire and leaving a space between the two into which the strengthened edge of
the other side of the cover can be inserted, a similar curvature being imparted
to all three strengthened edges, so that the single edge is in effect nipped between
the double one, or the two edges, and cannot be withdrawn by pulling them
straight apart, a certain amount of curving in the movement being necessary
to free them.
We prefer to make the double edge of a single piece of wire, that is to say,
the same wire is bent successively so as to form the zigzags of both flaps upon
one edge of the cover.
In the accompanying drawings which illustrate a tyre constructed according
to this invention,
Figure 1 is a perspective view of a section of the tyre shown in place upon
the wheel rim, and
Figure 2 is a similar view showing the tyre detached.
Like letters indicate like parts throughout the drawings.
One edge of the outer cover A of the tyre is provided with a double flap,
comprising two members BB', whilst the other edge carries a single flap C
only. The flaps of both edges are stiffened by means of a zigzag wire D, the
stiffening wire in the single Hap C being in the form of an ordinary zigzag, whilst
that in members BB of the double flap is so arranged that the one wire forms
a zigzag stiffening piece for both flaps. To effect this the wire, as shown in
Figure 2, is bent first to form one zigzag or loop D¹, say for the upper flap B,
it is then bent sharply down at right angles to this loop at D2 and again carried
forward parallel to one limb of the first loop and a loop or zigzag D formed for
the lower flap B. The wire is then again carried up by a sharp bend at D,
bent again at right angles to this upward bend, and is made to form a second
loop on a level with the loop D₁ for the upper flap B.
The wire is then
carried down again and this process of winding continued throughout the whole
circumferential length of the edge of the tyre.
Both the single and double stiffened edges of the tyre are bent so as to present
a convex surface on that side facing the interior of the tyre, when in position
on the wheel rim, and the single edge C and the double edge D are intercalated.
The single edge C thus becomes firmly gripped between the flaps of the double
edge by the downward pressure of the inner tube when inflated. The curving of
the edges in addition to rendering the tyre more secure on the wheel rim also
permits the tyre to be inflated when off the wheel, as the edges being curved
in the manner described cannot be drawn apart in a straight line but must be
withdrawn along an are to separate them, which the inflation of the tyre does not
tend to do.
In addition to the flaps BB and C the edges of the tyre, may, if desired, be
provided with unstrengthened flaps to further secure the two edges together.
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. In a pneumatic tyre the combination with an outer cover having a double

page_text: flap B B on one edge of a stiffening wire D common to both members BB¹
substantially as described.
2. In a pneumatic tyre the combination with an outer cover of a double
flap B B on one edge stiffened, with a wire common to both members and a
single stiffened flap on the other edge substantially as and for the purpose
described.
3. In the cover of a pneumatic tyre, the combination with a double flap B B¹
stiffened by a common wire 1) of a single stiffened edge C the stiffened wire in
each edge being convexed substantially as and for the purpose described.
4. The complete outer cover for a pneumatic tyre constructed substantially as
described and illustrated in the accompanying drawings.
Dated this 18th day of July 1900.
Signatures,
JAMES JELLEY.
HERBERT JELLEY.
Boult, Wade & Kilburn,
Agents for the Applicants.