Improvements in or relating to Pneumatic Tyres.
Year: 1896

page_text: Date of Application, 21st Nov., 1898
Complete Specification Left, 23rd Aug., 1897-Accepted, 23rd Oct., 1897
PROVISIONAL SPECIFICATION.
Improvements in or relating to Pneumatic Tyres.
We, ALFRED NORREYS, Stockbroker, of 110 Strand, in the City of London, and
WILLIAM HENRY KANZOW BOWLEY, Engineer, of 13 Athol Terrace, Dover, in the
County of Kent, do hereby declare the nature of this invention to be as follows:-
'This invention relates to pneumatic tyres its object being the provision in the
tyre or cover or attached thereto of a flexible metallic tubing to retain it securely
on the rim whilst allowing it to be readily removed at any point when desired.
The extensibility of tho convolutions of the helically wound and interlocking
corrugated metal strip forming the tubing, according to this invention, is
limited to that which is necessary to allow of the tubing being easily drawn over
the edges of the wheel rim for the ready removal of the cover, this requirement
being fulfilled since the successive helically wound convolutions of the tubo sliding
one upon the other and being pulled or drawn to their utmost extensibility can bo
extended no further, thereby preventing the cover or tyre falling off when deflated.
This tubing or armouring may bo made in any desired shape but to secure the
best hold to the rim we prefer to use it oval or flat without impairing its extensi-
bility. The channels in the rim are suitably shaped to receive the metallic tubing
so that the pull upon the tyre or cover to which the tubing is attached has no
tendency to withdraw it from the rim but tends to jamb or lock it in the channel.
Although there is no reason to fear that the tyre thus constructed would slip
round upon the rim or "creep," we may corrugate or roughen the channels in
the rim so that the convolutions of the metallic tubing or armouring may engage
with the portions of the rim and interlock so as to prevent the relative movement
of the tyre around the rim.
An air tube of ordinary construction may be used. The turned over edges or
flanges of the convolutions of the tube, instead of being as hitherto, substantially
perpendicular to the main part or web, are turned quite over so as to be parallel
to the web, this being effected by special machinery which need not be described
here as it does not form any part of the present application.
Dated this 21st dow of November 1906
BOULT & WADE,
Agents for the Applicants.
Improvements in or relating to Pneumatic Tyres.
We, ALFRED NORRBYS, Stockbroker, of 110 Strand, in the City of London, and
6 WILLIAM HENRY KANZOW BOWLEY, Engineor, of 13 Athol Terrace, Dover, in the
[Price 8d.]

page_text: County of Kent, 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 its object being the provision in the
tyre or cover of beads or enlargements of a special kind to retain it securely on
the rim whilst enabling it to be readily removed at any point when desired.
The special bead or enlargement consists mainly of the well known type of
flexible metallic tubing or "armouring" presently described; it is contained in or
attached to the edges of the cover or to the tyre, which are intended to fit into
channels of the rim.
In the accompanying drawings
Fig. 1 is a perspective view of a short length of improved tyre-cover according
to this invention;
Figure 2 is a perspective view of a short segment of whoel-rim with the
improved tyre-cover in place therein, containing an inflated air-tube;
Figure 3 is a side elovation partly in section;
Figure 4 a plan partly in section, and
Figure 5 an end elevation of a piece of the flexible tubing herein before
referred to.
Liko letters indicate liko parts throughout the drawings.
With reference first to Figure 1, it will be seen that the tyre-cover A has at its
opposite edges pockets B in which are received two circumferential coils C of the
flexible tubing or "armouring" each coil being elliptical or oblong in cross
section so as to produce a flat bead. The coils C fit the interior of the pockets B
and constitute, with the pockets the beads or enlargements.
"
From Figures 3, 4, and 5 it will be seen that the tubing or armouring
which is shown also in Figures 1 and 2 consists of a strip C' of metal having at
one edge a flange C and at the opposite edge a similar flange C, this strip being
given an elliptic helical form in such a manner that the flange Con each turn
engages with and retains the flange on the contiguous turn, there being how-
ever sufficient slackness between the smaller flange and the larger flange C to
enable the coil to be given a limited endwise or axial extension before these two
flanges meet and prevent further endwise movement. This type of flexible
tubing or "armouring" is well known and does not except in its application form
any part of the present invention.
As a further alternative flexible metallic tubing or "armouring" the usual or
other suitable types can be employed in the tyro-cover instead of the particular
form hereinbefore described with reference to the drawings.
Instead of placing the metallic coils in pockets in the edges of the cover the
latter may have the enlargements attached to it in any suitable manner; the
enlargements may be constituted by the coils alone without any pocket or casing
upon them.
A tyre cover with the improved enlargement herein before described would be
employed in the manner indicated in Figure 2, that is to say with a rim E having
channels or grooves E of such form that the coils C would fit closely in them as
shown with their mujor axes of cross section horizontal. Aftor the cover A is
thus put upon the rim the air tube F is inflated inside the cover the beads prevent-
ing the latter from being blown off and the flat elliptic or oblong shape of the
beads and rim channels preventing the beads turning and drawing out of the
channel.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
1. A beaded or enlarged edge of a pneumatic tyre or cover formed" of flexible
metal tubing or "
'armouring" substantially as described.

page_text: 2. A core for the beaded or enlarged edge of a pneumatic tyre or cover formed
of flexible metal tubing or "armouring" capable of a limited extensibility.
3. The flexible tubular core for the beaded or enlarged edge of a pneumatio
tyre or cover described and illustrated in the accompanying drawings.
4. The complete pneumatic tyre or tyre-cover substantially as described and
illustrated in Figure 1 of the accompanying drawings.
5. The combination and arrangement of parts constituting the complete
pneumatic tyred rim substantially as described and illustrated in Figure 2 of the
accompanying drawings.
ALFRED NORREYS.
W. H. K. BOWLEY.
Boult & Wade,
Agents for the Applicants.