Improvements in Pneumatic Tyres.
Year: 1897

page_text: Date of Application, 6th Aug., 1897
1000
1000
Improvements in Pneumatic Tyres.
I, GEORGE HOOкHAM, of New Bartholomew Street, in the City of Birmingham,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to pneumatic tyres, and my object is to provide a cover
which is firmly attached to the rim, and at the same time is easily detachable
as to part of it, so as to enable the inner tube to be got at for repairs.
My invention consists in constructing a cover in such a manner that one edge
is firmly bound or fastened to the rim. A projecting flap, however projects
from that edge somewhat across the rim, and is formed underneath or above
with a longitudinal rib or ribs. The other edge of the cover is formed with a
corresponding longitudinal rib or ribs, and the cover is preferably passed over an
inner air tube, and the ribs are caused to interlock with each other and so
disposed with reference to the inner tube that the pressure of the inner tube forces
the edge of the cover into the fixed interlocking edge. The fixed edge may be
fixed to the rim by binding or clamping of any kind, or by clamping by means
of a continuous plate or band which may be elastic longitudinally, or it may be
stitched or sewn to the rim with wire, leather or other material. By this device
one edge of my cover is made readily removable, and the inner tube is readily
got at. If I use the cover without an inner tube, I make this edge contractile,
preferably by applying to it a spring wire pressing it down on to the fixed edge.
Dated this 6th day of August 1897.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant
Improvements in Pneumatic Tyres.
I, GEORGE HOOKHAM, of New Bartholomew Street, in the City of Birmingham,
Engineer, 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:-
My invention relates to pneumatic tyres and my object is to provide a cover
which is firmly attached to the rim, and at the same time is easily detachable
as to part of it, so as to enable the inner tube to be got at for repairs.
My invention consists in constructing a cover in such a manner that one edge
077

page_text: is firmly bound or fastened to the rim. A projecting flap, however, projects
from that edge somewhat across the rim, and is formed underneath or above
with a longitudinal rib or ribs. The other edge of the cover is formed with a
corresponding rib or ribs, and the cover is preferably passed over an
inner air tube, and the ribs are caused to interlock with each other and so
disposed with reference to the inner tube that the pressure of the inner tube forces
the edge of the cover into the fixed interlocking edge. The fixed edge may be
fixed to the rim by binding or clamping of any kind, or by clamping by means
of a continuous plate or band which may be elastic longitudinally or it may be
stitched or sewn to the rim with wire, leather, or other material. By this device
one edge of my cover is made readily removable, and the inner tube is readily
got at. If I use the cover without an inner tube, I make this edge contractile,
preferably by applying to it a spring wire pressing it down on to the fixed edge.
The accompanying sheet of drawings illustrates two modifications off my
invention and as follows:-
-
Figure 1, is a transverse section partly in perspective of the improved cover
on a tyre with an inner tube.
Figure 2, is a transverse section partly in perspective of the improved cover
when no inner tube is used.
It
In carrying my invention into effect as illustrated at Figure 1, I attach or
bind one edge of the cover A. to the metal rim B by the wires C (though equivalent
devices may be employed); and, preferably upon the upper face of this edge
I provide longitudinal rib or ribs D which engage when the tyre is inflated with
corresponding grooves E on the adjacent face of the other edge of the cover.
is evident that the inner tube I may be easily removed for repairs and replaced
in position by simply withdrawing the loose edge of the cover after deflation and
tucking the same edge in round the tube F when repaired in the manner shown
in the drawing. The inflation of the inner tube F secures the loose edge by
forcing it downwards so that the parts D and E interlock.
When no inner tube is employed I construct the cover A with similar longi-
tudinal ribs D on one edge and corresponding indentations E on the opposite
edge; and I similarly secure one edge firmly to the rim B. In this modification
the means adopted to bind the one edge to the rim is that of a metal band G
secured by tightening up a right and left hand screw H passing through eye
pieces I attached to opposite ends of the band; though the wires used in the
previous modification or other equivalent devices may also be employed. To
cause the free edge to contract upon the bound edge when the tyre is in situ I
place within pockets in the free edge one or more spring wires extensible longi-
tudinally such as the wires J, J. Any well known form of extensible edge may
however be used as a substitute for the wires J, J. To ensure that this construc-
tion may be air tight upon inflation the contact faces of the tyre may be made of
soft rubber or other suitable material.
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:-
1. In pneumatic tyres arranged with an inner tube and a divided outer
cover, binding or securing one edge of the outer cover to the metal rim by wires,
bands, or their equivalents and providing upon an extension of the bound edge
longitudinal ribs which engage with corresponding indentations or grooves on
the free edge of the cover when the latter has been tucked in round the inner tube
into position all substantially as and for the purposes hereinbefore described.
2. In pneumatic tyres consisting of a divided outer cover only, binding or
securing one edge of the said cover to the rim by wires, bands or their equivalents
and providing upon an extension of the bound edge longitudinal ribs which
engage with corresponding indentations or grooves in the free and longitudinally

page_text: extensible edge of the cover when the latter has been sprung into position upon
the rim all substantially as and for the purpose hereinbefore described.
Dated this 5th day of May 1898.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.