An Improved Fabric or Lining for the Outer Covers of Pneumatic Tyres.
Year: 1895

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 18 of the Patents, &c., Act, 1883), as allowed by
the decision of the Chief Examiner of the 21st day of August 1896.
Date of Application, 9th Mar., 1895
Complete Specification Left, 9th Dec., 1895-Accepted, 18th Jan., 1896
PROVISIONAL SPECIFICATION.
An Improved Fabric or Lining for the Outer Covers of Pneumatic
Tyres.
I, RICHARD PRITT, of 39, Regent Street, Lancaster, in the County of
Lancaster, Commission Agent, do hereby declare the nature of this invention to
be as follows:-
This invention consists in an improved fabric for use as the inner lining for the
outer covers of pneumatic tyres and has for its object to provide a light yet strong
fabric which will readily accommodate itself to the varying strains produced as the
outer cover gradually assumes its circular sectional form during the process of
inflation. It is also designed to decrease the frictional wear of the inner lining
under the edges of the wheel rim caused by the "creeping" action of the outer
cover against the air chamber and at the same time to prevent elongation of the
outer cover.
According to my said invention I cause the central or tread portion of the
improved fabric to be woven of greater length than the outside edges in order to
compensate for the difference in diameter between the outside and inside of the
tyre. This may be effected-in the loom for weaving the said fabric-by employing
two separate warp beams the one letting off the warp-for the central portion-
faster than the warp for the outside edges and by making the taking-up roller of
larger diameter for the central portion of the fabric and of less diameter for the
edges. To prevent wear and tear upon the unwoven weft threads between the
woven edges and central portion of the fabric I enclose them within a pocket or
vibrating chamber" formed by laying over each side of the unwoven threads and
"solutionizing to the woven central and outside parts on each side thereof a
ribbon or layer of flannel soft felt or similar material.
The flannel pocket or
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"
vibrating chamber is also applicable to that part of the fabric described above as
being unwoven if the same be woven-for the purpose of preventing wear and tear
--but where the fabric is composed entirely of woven material I arrange the length
of the warp threads to gradually decrease from the central portion to the outer
edges of the fabric for the purpose hereinbefore mentioned.
T: 0 S Much TOOK

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COMPLETE SPECIFICATION (AMENDED).
An Improved Fabric or Lining for the Outer Covers of Pneumatic
Tyres.
I, RICHARD PRITT, of 39, Regent Street, Lancaster, in the County of
Lancaster, Commission 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:-
This invention has reference to an improved fabric for use as the inner lining for
the outer covers of pneumatic tyres. In one arrangement I make the said fabric
with the central or tread portion and the edges of plain cloth the part between the
woven edges and woven central part consisting of transversely arranged unwoven
weft threads. In another arrangement I cause the central or tread portion to be
woven of greater length than the outside edges in order to compensate for the
difference in diameter between the outside and inside of the tyre and to prevent
crinkling at the edges of the fabric when the tyre is "made up." This may be
effected in the loom for weaving the fabric by employing two or more separate
warp beams the one letting off the warp for the central portion faster than those
letting off the warp for the sides and outside edges and by making the taking-up
roller of the loom of larger diameter for the centre of the fabric and of gradually.
decreasing diameter for the, sides and edges. To prevent wear and tear upon the
unwoven weft threads-between the woven edges and central portion of the fabric
-I enclose them within a pocket or "vibrating chamber" formed by laying over
each side of the unwoven threads and "solutionizing" to the woven central and
outside parts on each side thereof a ribbon or layer of flannel soft felt or similar
material. The flannel pocket or vibrating chamber is also applicable to that part
of the fabric described above as being unwoven if the said parts be woven of plain
cloth for the purpose of preventing wear and tear but where the fabric is composed
entirely of plain cloth I arrange the length of the warp threads to be gradually
decreased from the central portion to the outer edges of the fabric for the purpose
hereinhefore mentioned.
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In the accompanying drawings,
Fig. 1 is a plan view of my improved fabric as seen on the flat.
Fig. 2 is a side view shewing the making-up of a pneumatic tyre to which my
improved fabric is applied and
Fig. 3 is a cross-sectional view of the same.
a is the central or tread portion of the improved fabric the warp threads being
longest at 1 and gradually decreasing in length until the shortest warp threads are
at 4, 4. bb are the unwoven parts of transverse weft threads enclosed within the
.pockets or vibrating chambers c c. d d are the edges of plain cloth and ee are
also of plain cloth but the warp threads at the parts e e may be of thin metal wire
to give additional strength to the edges of the fabric the parts d d being doubled
over and solutionized on to the parts e e and enclosing if required a wire for other
strengthening or thickening medium. 9 is an ordinary form of outer india-rubber
covering the layers of flannel on each side of the improved fabric being
solutionized thereto (as hereinbefore mentioned) excepting at the pockets c c.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
1. A fabric or lining for the outer covers of pneumatic tyres consisting of woven
material having longer warp threads at its central or tread portion than at its
edges and having on each side of the said fabric a layer of flannel soft felt or

page_text: similar material solutionized on to the said fabric so as to leave or form pockets or
vibrating chambers approximately opposite to the parts corresponding to those
marked in Fig. 1 of the drawings.
2. A fabric or lining for the outer covers of pneumatic tyres having its central
or tread portion and its edges of plain cloth and the part between its woven edges.
and its woven central or tread portion consisting of transverse unwoven weft threads
and having on each side of the said fabric a layer of flannel soft felt or similar
material solutionized on to the said fabric so as to leave or form pockets or vibrating
chambers where the weft threads are unwoven substantially as herein described
and shewn in the drawings for the purpose set forth.
Dated this 0th day of Dreambon 1805
For the Applicant,
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent..

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