Improvements in Protectors for Preventing Puncture of Pneumatic Tyres.
Year: 1899

page_text: Date of Application, 14th Mar., 1899-Accepted, 29th Apr.,
1899
COMPLETE SPECIFICATION,
Improvements in Protectors for Preventing Puncture of Pneumatic
Tyres.
I, EDWIN FAIRHURST, of 25, Elm Grove, Paddington, Liverpool, in the County
of Lancaster, Cycle. Maker, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention has for its object to provide a guard or protector to prevent
pneumatic tyres from being punctured by nails, thorns and other sharp articles
met with on the surface of the road.
The invention will be understood from the following description, reference being
bad to the accompanying drawings, in which :-
Figure 1 is a sectional elevation of a portion of a cycle wheel fitted with my
invention;
Figure 2 a plan with the outer tread or cover removed;
Figure 3 a cross section of the pockets;
Figure 4 a cross section of the tyre;
Figure a detail view of one of the protectors.
The invention consists in providing a series of plates A of horn or other like
material curved transversely to conform to the shape of the tyre and placed
longitudinally all round between the air tube B and outer cover C with their
edges overlapping. F is a strip of canvas-placed circumferentially all round the
tyre, and E is another strip of canvas sewn thereto. In this strip E there are
transverse slits 1 which in conjunction with the canvas F form pockets for
the curved plates. The canvas E is sewn transversely at 11 at intervals all round,
thus forming the pocket bottoms. The horn plates are inserted in the pockets and
the protector is then complete. It is placed inside the outer cover, and when
applied to the inside of the inner air tube will be found to effectually prevent
puncture, while allowing the requisite flexibility, which latter is obtained by the
series of overlapping bone segments and their flexible connections.
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:
1. In pneumatic tyres, placing over that part of the air tube which is likely
to suffer by being punctured, a protector formed of a series of plates of horn or
other like material curved transversely to conform to the shape of the tyre, and
placed longitudinally all round between the air tube and the outer cover with
edges_overlapping.
2. In protectors of the kind set forth in Claim 1, placing round the tyre between
the air tube and the outer cover, a piece or pieces of canvas having at close
intervals a series of pockets each adapted to receive a plate of horn and hold it in
position, so that it shall overlap the adjacent plate substantially as described.

page_text: 3. The general combined arrangement and construction of parts forming my
improved protector or guard for pneumatic tyres substantially as set forth and
illustrated in the accompanying drawings.
Dated this 13th day of March 1899
WM. P. THOMPSON & Co.,
Patent Agents, Of Liverpool, Manchester, Birmingham & London.