Improvements in Pneumatic Tyres.
Year: 1893

page_text: Date of Application, 8th Nov., 1893
Complete Specification Left, 11th July, 1894-Accepted, 25th Aug.. 1894
PROVISIONAL SPECIFICATION.
Improvements in Pneumatic Tyres.
WILLIAM ROCKLIFFE 8 Clarence Crescent Whitley Engineer WILLIAM
BELL KIRSOP of 21 Northumberland Street Newcastle upon Tyne Bicycle
Manufacturer and Edward Clark of 28 Pilgrim Street Newcastle upon Tyne
Solicitor do hereby declare the nature of this invention to be as follows:-
The invention relates to improvements in pneumatic tyres made of india rubber
and canvas or any other suitable material and has for its object the construction
The
and manufacture of "tyres" to prevent "creeping" of the outer cover.
creeping of the "tyre" is one of the principal causes of puncturing especially when
the air bag has lost a portion of its air pressure. The "tyre" or outer cover
gradually creeps round the rim when travelling causing the air tube to be drawn
round with it, and the air tube being fastened to the rim or wheel by an air valve
is prevented from circulating with the outer cover or tyre. In this creeping
process the air tube is drawn up tight until it gives way. This is of common
occurrence with the tyres now in use.
By our invention we absolutely prevent the creeping of the tyres by the following
means. The edges of the tyres are provided with teeth or projections similar to
that of a cogged wheel. These correspond with a ring fixed on the rim or wheel
which locks them together in like manner as two cogged wheels face to face. This
ring may be made of any suitable material either to be cemented on or otherwise
secured to the rim. The edges of rim or wheel may be rolled or pressed with teeth
or projections to correspond with those on the edge of tyre. The teeth or
projections may take various forms. The great advantage these tyres have over
others is that every part of the edge of the tyre bears an equal portion of the
strain. Owing to the teeth like form they run perpendicularly from edge of rim
towards the centre of rim or hollow from 1 to inch deep as required.
Dated this Seventh day of November 1893.
WM. KOOKLIFTE
W. B. KIRSOP.
EDWARD CLARK.
COMPLETE SPECIFICATION.
Improvements in Pneumatic Tyres.
We, WILLIAM ROCKLIFFE, Engineer of 8 Clarence Crescent, Whitley in
the County of Northumberland, and WILLIAM BELL KIRSOP, Bicycle Maker
of 21 Northumberland Street, and EDWARD CLARK, Solicitor of 75 Pilgrim
Street both in the City and County of Newcastle on Tyne, 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 made of india rubber
and canvas or any other suitable material and has for its object the construction
and manufacture of tyres to prevent "creeping
creeping" is one of the
causes of puncturing especially when the air bag has lost a portion of its air
pressure.
05
In running the tyre or outer cover tends to gradually creep round the rim and
this drags the internal air tube round with it and as the air tube is fastened to the

page_text: rim or wheel at the air valve there is of course a tendency for the air tube to burst
or become broken, an occurrence which not infrequently happens.
By our invention we provide the edges of the tyre with teeth or projections and
we will fully explain this construction with reference to the accompanying
drawings in which
Figure 1 shows in side elevation part of a wheel rim and tyre Figure 2 being a
sectional plan view of one side of the rim on line wx in Figure 1.
Figures 3 and 4 show cross-sections of rims constructed in accordance with our
invention, Figure 3 being a section on e. g. line y of the rim shown in Figure 2.
It will be observed from the drawings that the tire edges are formed or
manufactured with teeth or projections E thereon and that the edges of the rim R
are similarly formed or manufactured as shown at R¹. In Figure 2, A is the
internal air tube.
The projections and recesses on the tire-edges fit into the corresponding recesses
and projections in the rim edges and in this manner creeping of the tyre around the
rim is practically rendered impossible.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :
Forming the edges of pneumatic tyres and the wheel rim edges with teeth or
projections and recesses thereon so that the projections and recesses on the tyre
may fit into the recesses and projections on the rim substantially as and for the
purpose herein set forth.
Dated this 9th day of July 1894.
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle on Tyne, Patent Agent.