Improvements in or applicable to Pneumatic Tyres for Wheels.
Year: 1895

page_text: Date of Application, 20th Apr., 1895
Complete Specification Left, 20th Feb., 1896-Accepted, 21st Mar., 1896
PROVISIONAL SPECIFICATION.
Improvements in or applicable to Pneumatic Tyres for Wheels.
1.
I EDWIN SHAW of 963 Ashton 'Old Road, Fairfield, Manchester, in the
County of Lancaster, Agent, do hereby declare the nature of this invention to be
as follows:-
The object of this invention is to render pneumatic tyres for wheels absolutely
unpuncturable.
13:11
The invention may be applied to pneumatic tyres formed with an inner air tube
of india rubber protected by a detachable outer cover formed of india rubber and
canvas combined, but I prefer to apply it to what are known as "single-tube" tyres
as being simpler; the principal objection to such tyres is that in the event of their
becoming punctured the patching or repairing has to be performed from the outside
and the cement employed must therefore be thoroughly dried and set before the
tyre can be safely inflated and used, but this objection disappears when the tyre is
made practically uupuncturable.
*
The invention consists principally in combining with the pneumatic tyre an outer
or protective "cushion" tyre of thick rubber which acts as the "tread" and
prevents the pneumatic tyre from coming at any time into contact with the road,
and hence prevents all chance of puncture by broken glass, stones, nails, thorns or
the like.
1.
The outer or cushion tyre is made of such a transverse section (either circular,
oval, vee-shaped, or angular or otherwise) and of such a size circumferentially that
its inner circumference shall be smaller than the outer circumference of the
pneumatic tube when fully inflated, so that the outer circumference of the latter
or grooved all round and the "cushion" tyre will lie in such
indenta indented o
or groove.
The outer circumference of the cushion tyre will project beyond the surface of
the pneumatic tyre to which it will form a completely unpuncturable "tread" and
preserve it entirely from contact with. the road...
"
will
?
The outer circumference of this cushion tyre or tread may be grooved, studded,
or otherwise roughened to prevent side slipping, and to give it a firm hold or grip
on the ground, and a canvas lining or other strengthening may be employed to
prevent it from stretching so that the inflation' of the pneumatic tube will hold it
firmly in place, and it may if preferred be further cemented or vulcanized or
otherwise attached to the outside of the pneumatic tyre, so that it will not become
detached even if (through leakage of the valve or otherwise) the latter should
become partially deflated.
I
If preferred the indentation in the outer periphery of the pneumatic tyre may be
permanently formed therein during its manufacture the form of the indentation or
circumferential groove being maintained by a stiffening lining of zino, aluminium,
or other suitable material..
A 100K

page_text: Improvements in or applicable to Pneumatic Tyres for w
I EDWIN SHAW of 963 Ashton Old Road, Fairfield, Manchester, in the
County of Lancaster, Agent, 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 :-
The object of this invention is to render pneumatic tyres for wheels absolutely
unpuncturable.
The invention may be applied to pneumatic tyres formed with an inner air tube
of india rubber protected by a detachable outer cover formed of india rubber and
canvas combined, but I prefer to apply it to what are known as "single-tube" tyres
as being simpler; the principal objection to such tyres is that in the event of their
becoming punctured the patching or repairing has to be performed from the outside
and the cement employed must therefore be thoroughly dried and set before the
tyre can be safely inflated and used, but this objection disappears when the tyre is
made practically unpuncturable.
The annexed drawing represents a transverse section of a single tube inflatible
tyre with my invention applied thereto.
The invention consists principally in combining with the pneumatic tyre d'an
outer or protective "cushion" tyre 6 of thick rubber, which acts as the "tread" and
prevents the pneumatic tyre from coming at any time into contact with the road,
and hence prevents all chance of puncture by broken glass, stones, nails, thorns or
the like.
The outer or cushion tyre b is made of such a transverse section (either circular,
oval, vee-shaped, angular or otherwise as shown on the drawing) and of such a size
circumferentially and so strengthened with canvas or otherwise that it cannot stretch
and that its inner circumference shall always be smaller than the outer circumference
of the pneumatic tube a when fully, inflated..the quter circumference of the latter
being indented or grooved all round so that the "cushion" tyre will lie in such
indentation or groove.
b
The outer circumference of the cushion tyre 6 will project beyond the surface of
the pneumatic tyre a to which it will form a completely unpuncturable "tread" and
preserve it entirely from contact with the road.
The outer circumference of this cushion tyre or tread may be grooved, studded,
or otherwise roughened to prevent side slipping, and to give it a firm hold or grip
on the ground, and a canvas lining or other strengthening may be employed as
before mentioned to prevent it from stretching so that the inflation of the pneumatic
tube will hold it firmly in place, and it may if preferred be further cemented or
vulcanized or otherwise attached to the outside of the pneumatic tyre, so that it will
not become detached even if (through leakage of the valve or otherwise) the latter
should become partially deflated.
If preferred the indentation in the outer periphery of the pneumatic tyre may be
permanently formed therein during its manufacture the form of the indentation or
circumferential groove being maintained by a stiffening lining of canvas zinc,
aluminium, or other suitable material as shown by the thick line at c.
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 :-
The combination with an inflatible oneumatic tyre of a protective outer cushion

page_text: of thick rubber which acts as a tread and prevents the liability to puncture
substantially as hereinbefore described and illustrated by the drawings annexed.
Dated this 19th day of February 1896.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.