Improvements in Pneumatic Tyres for Bloyole and other Wheels.
Year: 1896

page_text: Date of Application, 25th Aug., 1896-Accepted, 7th Nov., 1896
COMPLETE SPECIFICATION.
Improvements in Pneumatic Tyres for Bloyole and other Wheels.
We, ALEXANDER FEARN MUNRO, Tack Manufacturer and GEORGE OTIS
HITOHINGS, Broker in Skins, both of No. 64 High Street, Boston, Massachusetts,
United States of America, do horeby 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 consists of a pneumatic tire for bicycle and other wheels
constructed and arranged substantially as hereinafter fully described; reference
being had to the accompanying drawing in which is illustrated a pneumatio tire
constructed in accordance with this invention;
Figure 1 is a detail cross section of the rim of a bicycle wheel having the
improved tire applied thereto;
Figure 2 is a detail plau view of a strip of leather prepared for shaping it into
a form for the tire;
Figure 3 is a cross section on line 3-3 Figure 2.
In the drawings A represents in cross seotion the rim of a wheel of a bicycle,
and B the pneumatic tire, the rim being suitably hollowed out circumferentially
at C to receive the pneumatic tire as usual and needing no more particular
description herein.
This tire is of tube form and it is constructed of leather D and an inner lining
tube E of india rubber with a strip of thin leather or skin F located as shown on
the inner side of the leather D between it and the india rubber lining over the
portion of the tire which runs upon the ground when in use.
The leather is cut into strips of the required length to encircle circumferentially
the rim of the wheel and of a width for the desired diameter of the tire.
At its side edges it is skived or chamfered on opposite sides, as at G and H
respectively.
Across the surface or side J of the leather strip which is intended for the inside
of the pneumatic tube are cut a series of grooves or serrations K, at intervala
deeired, extending from each side edge L in diagonal lines parallel or substantially
parallel with each other, to or nearly to the central longitudinal line of the strip,
as shown in Figure 2. These grooves or serrations are preferably wider and
deeper at the edges of the strip and gradually narrowing and lessening in depth
respectively toward the central line of the strip.
Over the central longitudinal portion of the inner side J of the leather strip
is secured by paste or cement or in any suitable manner, a thin strip or skiver
of leather, which extends the length of the strip and is of a width to correspond
substantially to the width of the bearing surface M of the tiro when in use.
The india rubber is preferably made in the form of a tube or pipe, although
it can be in a strip form and folded if desired.
In putting the parts together to form the tire the leather strip having its edge
chamfered and the thin strip F applied thereto, is folded or rolled closely over
the india rubber tube and its chamfered sides or edges overlapped and secured
together by cement or in any suitable manner; the tire is then pressed round and
closely to the seat in the groove C of the wheel rim, its joint inside as shown in cross
section in Figure 1; the ends are secured together in any of the usual ways of
securing pneumatic tires of rubber or other flexible material to make the tire
practically endless, and air tight.

page_text: The grooves and serrations increase the flexibility of the leather, at the same
time they are not deep or wide enough to detract much from its requisite strength.
The ends of the tire are joined and secured together in any of the usual ways to
make the joint on its outer surface flush and smooth and needing no particular
description herein.
The tire can be made without the india rubber lining but it is preferable to
have it.
The strip F secured to the leather serves to strengthen that portion of the tire
where the most strain and wear and tear comes in use.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. A pneumatic tire for bioyole and other wheels made of leather, its inner
surface having grooves or serrations in diagonal lines and a lining of india rubber.
2. A pneumatic tire for bicycle and other wheels made of leather, its inner
surface having grooves or serrations running in diagonal lines from the longitudinal
central line of tread of the tire.
3. A pneumatic tire for bicycle and other wheels made of leather, its inner
Burface having grooves or serrations running in diagonal lines from the longitudinal
central line of tread of the tire, and a lining of india rubber.
4. A pneumatic tire for bicycle and other wheels made of leather, its inner
Burface having grooves or serrations, and a strip of leather secured to the inner
side of the tire along its line of tread.
5. A pneumatic tire for bicycle and other wheels made of leather, its inner
surface having grooves or serrations, a strip of leather secured to the inner side of
the tire along its line of tread, and a lining of india rubber.
6. A pneumatic tire for bicycle and other wheels made of leather, the inner
surface of the leather being grooved or serrated, the grooves or serrations tapering
in width from their ends at the centre line of the tread of the tire to their outer or
other ends, and an inner lining of india rubber.
Dated this 25th day of August 1898
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicants.