Improvements in Pneumatic Tyres.
Year: 1896

page_text: Date of Application, 24th Jan., 1896-Accepted, 29th Feb., 1896
COMPLETE SPECIFICATION.
Improvements in Pneumatic Tyres.
I, DAVID WATSON ALEXANDER, of 5-7 Scott Street, in the City of Toronto,
in the County of York, in the Province of Ontario, Canada, Merchant, 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 improvements in pneumatic tyres and the object of the
invention is to design an improved form preferably for leather tyres in which the
edges may be securely joined and yet a simple provision made for the insertion and
withdrawal of the tube and it consists essentially of a leather tyre having the edges
provided with peculiar over-lapping laps secured together by stitching and cement,
one portion of the inner circumferential join being left open for the insertion of the
tube and closed by staples and a rod of peculiar construction as hereinafter more
particularly explained.
Fig. 1, is a perspective view of portion of the envelope of a tyre constructed in
accordance with my invention.
Fig. 2, is an enlarged view of portion of the tyre partially broken away.
Fig. 3, is a cross section.
In the drawings like letters of reference indicate corresponding parts in each
figure.
A is the tyre, which is made of a single piece of leather, which is joined at
the interior of the circumference so as to be next the rim and in the following
manner.
a is a lower flap, a is the opposing edge, which is secured to the lower flap by
cement and also by a row of stitching a. a3 is the outer flap of the double flap
edge, which forms a V-shaped recess into which the tapered edge at of the opposing
edge fits. The edge flap a³ is cemented over the stitching, so that the outer and
inner contours are perfectly concentric.
The ends of the tube are joined by the correspondingly formed edge flaps at a*
and intermediate flap a with a row of stitching A'. Portion of the opposing
edges is left free and is provided with staples B of wire or other suitable material,
which extends through openings. B' in the outer edge flap a³. The staples B are
located at short distances apart on a line with each other circumferentially and
have inserted through them a wire C preferably with a looped end c.
By withdrawing the wire C the flap may be opened very quickly and the tube
inserted or withdrawn. When inserted the wire C may be readily inserted in
position again through all the staples B, thereby securely holding the edges
together and preventing the tyre from being unduly expanded at this point upon
the inflation of the tube.
By the construction I describe I am enabled to produce a very simple and secure
means for holding the edges of the leather tyre together both circumferentially and
as to the ends and at the same time a ready means is provided whereby the tube
may be inserted or withdrawn and the opening closed again.
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 that what I
claim is.
1. A pneumatic tyre comprising an envelope having on one edge a double flap
integral and having inserted between it the flap of the opposing edge, the parts

page_text: being cemented together and of equal total thickness as the remaining portion of
the leather as and for the purpose specified.
2. A pneumatic tyre comprising au envelope having on one edge a double flap
integral and having inserted between it the single flap of the opposing edge, the
parts being cemented together and of equal total thickness as the remaining
portion of the leather and a row of stitching for securing the inner two edges
together, such stitching being covered by the outer edge flap as and for the purpose
specified.
3. The combination with the tyre having the edges suitably secured internally,
of the end flaps a and intermediate opposing flap as with a row of stitching A
through the inner flap a and the flap a as and for the purpose specified.
4. The combination with the tyre having the ends of the leather suitably secured
together, of the opposing flaps having the opening in them, staples extending
through one flap and openings in the outer flap, and a wire extending through the
outer ends of the staples as and for the purpose specified.
DouL J
ST 1004
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.