Improvements in Pneumatic Tires.
Year: 1897

page_text: Date of Application, 28th Aug., 1897-Accepted, 20th Nov., 1897
COMPLETE SPECIFICATION.
Improvements in Pneumatic Tires..
We, WILLIAM ALBERT DIXON GRAHAM, of 109 Yonge Street, and JOSEPH
NEWTON SHENSTONE, of 16 Walmer Road, both of the City of Toronto, of the
County of York, in the Province of Ontario, Canada, Tire. Manufacturers, 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 follow-
ing statement:-
Our invention relates to improvements in pneumatic tires and the object of
the invention is to design a form of tire particularly adaptable for wood rims,
which may be fastened within itself independently of the rim, and thereby relieve
all splitting pressure off the wood, will prevent the cover from cutting on the
rim, will act as a cushion in a case of emergency should it be necessary to ride
the tire deflated, will keep all moisture from the inner tube and in
which also there will be no possibility of the inner tube becoming pinched
when the tire is being put on and it consists essentially, of a tire having inner
circumferential locking lips and circumferential beads extending laterally there-
from and formed integral with one edge of the tire, an interior circumferential
flap being also provided to the exterior of the recess between the beads designed
to receive the opposing locking lip, the parts being arranged and constructed in
detail as hereinafter more particularly explained.
Figure 1 is a perspective view of a portion of a tire and rim of a wheel showing
our construction.
Figure 2 is a similar view showing the locking lip disengaged.
In the drawings like letters of reference indicate corresponding parts in each
figure.
A is the rim of the wheel, B is the tire and C is the air tube. The tire B is
provided with an interior recess b, which forms an interlocking lip 6' at one edge
thereof, which is designed to be engaged by the interlocking lip on the opposing
edge of the tire, such interlocking lip fitting within the recess b. The recess
is formed preferably with inclined sides, the lip b¹ being an acute angled lip.
The outer side of the lip b is also acute angled and the lip 6 corresponds cross-
sectionally with the form of the recess b.
B1 and B are beads formed on the inner circumferential edges of one edge of
the tire and integral. The beads B1 and B form a supplemental tire, which
effectually prevents the cover from cutting on the rim. This supplemental tire
also acts as a cushion in case of emergency, should it be necessary to ride the tire
deflated.
D is a flap attached to or forming part of the tire B and located circumferentially
outside of the recess 6 and extending over such recess and preferably over the
bead B. The free end of the flap is quite loose and flexible and serves to prevent
the tube C before and during the time that the lip 68 is being inserted in position
from becoming pinched. The interlocking beads, 61 and are held in posi-
tion by the flap D when the tube C is inflated.

page_text: The supplemental tire is circumferentially, convex on its interior and fits into a
concave groove a in the rim A.
It will be seen that our tire is readily detachable and will fit any rim. It is
very simple and in practice we find that, even if the tube becomes deflated, the
interlocking lips will not be disengaged but will hold securely. There are no
mechanical fastenings connected to it, and as it is extremely simple to detach
it, it will be readily understood that a puncture may be readily repaired.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed, we declare that what
we claim is:-
1. A pneumatic tire. for bicycle and other wheels comprising the envelope,
or tire proper, having a supplemental portion integrally formed with one edge
thereof on its interior periphery and fitting in a groove on the rim, a' ciroum-
ferential recess in the supplemental portion forming an interlocking lip at one
edge, an interlocking lip on the opposite edge of the tire designed to fit in such
recess, circumferential beads extending freely out from the supplemental portion and
the air tube located within the tire as, and for the purpose, specified.
2. A pneumatic tire for bicycle and other wheels comprising the envelope, or
tire proper, having a supplemental portion integrally formed with one edge
thereof on its interior periphery and fifting in a groove on the rim, a circum-
ferential recess in the supplemental portion forming an interlocking lip at one
edge, an interlocking lip at the opposite edge of the tire designed to fit in such
recess, circumferential heads extending freely out from the supplemental portion,
an interior circumferential flap attached to or forming part of the tire laterally
to the inside of the recess and covering such recess and resting on the free
beaded edge and the air tube located within the tire as, and for the purpose,
specified.
Dated the 28th day of August 1897. '...
G. F. REDFERN & Co,
4
1
4, South Street, Finsbury, London, Agents for the. Applicants.
G. F. REDFERN & Co,
4, South Street, Finsbury, London, Agents for the. Applicants.