Improvements in Pneumatic Tyres for Vehicles.
Year: 1896

page_text: Date of Application, 7th Nov., 1896
Complete Specification Left, 14th July, 1897-Accepted, 16th Oct., 1897
icies.
I. HENRY GORDON CARTWRIGHT of Lennox House, 143, Croydon Road, Anerley,
S.E., Surgeon, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in pneumatic tyres for bicycles, tricycles,
and other vehicles and has for its object the rendering of the same puncture
proof against any sharp object it may come in contact with upon the roadway.
For this purpose I construct the outer tube or case forming the cover of a
combination of different materials arranged in layers around the circumference
of the said cover and constituting its body or thickness.
These different layers forming the compound cover consist of the following
materials arranged preferably in the order named, viz: The outer layer forming
the thread, is of rubber or asbestos whilst the layer next and inside this is of
canvas; the next layer is formed of mica and inside this is another layer of
canvas. Within and next to the said canvas is another layer of mica and next
to the latter, is again another layer of canvas forming the inner periphery or
surface of the cover in contact with the pneumatic tube, these layers being
cemented or otherwise connected to each other.
I thus form a solid cover of about the same resiliency as an ordinary tyre cover
but which by reason of the several layers of the different materials named it is
almost impossible to penetrate by any sharp instrument.
I do not confine myself to the number or placement of the said layers but the
above described arrangement is that which I prefer to employ.
Dated this 5th day of November 1896
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Pneumatic Tyres for Vehicles.
HENRY GORDON CARTWRIGHT of Waterford House, Narborough, near Leicester,
late of Lennox House, 143 Croydon Road Anerley S.E. 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 improvements in pneumatic tyres for bicycles, tricycles,
and other vehicles, and has for its object, the rendering of the same puncture
proof against any sharp object it may come in contact with upon the roadway.
D

page_text: For this purpose I construct the outer tube, or case forming the cover, of a
combination of different materials, arranged in layers around the circumference
of the said cover and constituting its-body or thickness. These different layers
forming the compound cover, consist of the following materials arranged preferably
in the order named, viz: The outer layer forming the tread is of rubber,
whilst the layer next and inside this is of canvas; the next layer is formed
of mica, and inside this is another layer of canvas. Within and next to the said
canvas is another layer of mica, and next to the latter is again another layer of
canvas, forming the inner periphery or surface of the cover in contact with the
pneumatic tube, these layers being cemented or otherwise to each other.
I thus form a solid cover of about the same resiliency as an ordinary tyre cover,
but which by reason of the several layers of the different materials named it is
almost impossible to penetrate by any sharp instrument.
I do not conform myself to the number or placement of the said layers, but the
above described arrangement is that which I prefer to employ..
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what I
claim is
Placing thin layers of mica between canvas, and attaching them to the under
side or inside of outer cover, or inside of single tube for preventing any sharp
substance from penetrating the inner tube or any air tube.
Dated this 14th day of July One thousand eight hundred and ninety-seven.
H. G. CARTWRIGHT.