Improvements in or connected with Elastic Tyres for Velocipedes and other Road Vehicles.
Year: 1896

page_text: Date of Application, 14th May, 1896
Complete Specification Left, 15th Feb., 1897-Accepted, 10th Apr., 1897
PROVISIONAL SPECIFICATION.
Improvements in or connected with Elastic Tyres for Velocipedes
and other Road Vehicles.
We, ALFRED EBENEZER MAVOR of 32 Victoria Street, Westminster, in the
County of London, Engineer, and WILLIAM JONES of 12 High Street, North
Woolwich, in the County of Kent, India Rubber Manufacturer, do hereby declare
the nature of this invention to be as follows:-
This invention refers to improved means or arrangements whereby a solid or
semi-solid elastic tyre is supported or held out from the base of the rim or felloe
by closed elastic air chambers.
According to our invention, we provide a rim or felloe, having a circumferential
exterior channel more than sufficiently deep to receive a solid or other tyre, say for
example an india rubber "cushion" tyre, that is a tyre of somewhat large section
having a central bore or hollow. Between the outer cushion or solid tyre and the
base of the felloe we arrange say, two circumferential parallel tubes covered with
canvas or other material so as to enable the said tubes to be inflated without undue
extension; wire gauze may be employed instead of canvas. A suitable valve or
valves is or are provided by which the said parallel air tubes may be inflated. In
some cases the air tubes may be sealed and the use of valves thus rendered
unnecessary. The outer cushion or solid tyre is secured in place by cementing
same, say, to the canvas covering of the air tubes, or it may be held in place by
means of well known spring wires passed centrally through such tyre.
The parallel air tubes are sprung into position before the ends of the canvas
covering are joined.
Instead of providing two separate air tubes, we may provide but one, this latter
being of a size to cover or line the interior of the rim channel, and form a resilient
seating for the solid or cushion tyre.
The air tube may thus be caused to assume say a crescent section and receive
between the crescent arms a solid or cushion tyre which latter may be secured in
place in any approved manner.
Or the solid or cushion tyre may be recessed at each side, laterally, and
circumferentially, and be held in place by the horns of the inflated tube (supported
by the rim) entering such recess. A tape or band extends circumferentially above
the inflated tube and maintains its crescent section.
By our invention we are enabled to produce a tyre possessing nearly the
resiliency of the usual air inflated tyre, while at the same time puncture is rendered
practically impossible and the "life" of the tyre is increased.
BREWER & SON,
London and Leeds, Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in or connected with Elastic Tyres for Velocipedes
and other Road Vehicles.
We, ALFRED EBENEZER MAVOR, of 32 Victoria Street, Westminster, in the
County of London Engineer, and WILLIAM JONES of 12 High Street, North
Woolwich, in the County of Kent, India Rubber Manufacturer, 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 refers to improved means or arrangements whereby a solid or
semi-solid elastic tyre is supported or held out from the base of the rim or felloe
by closed or inflated elastic air chambers, and in order that our said invention may
be readily understood we will describe same with reference to the accompanying
drawings, whereon Fig. 1 is a transverse section of a solid or semi-solid elastic tyre
and felloe with intervening air cushioning tubes; Fig. 2 is a similar view, shewing
the application of a single air cushion; Fig. 3 shews a similar application to a tyre
of a shape varying from that before shewn.
According to our invention, and as shewn at Fig. 1, we provide a rim or felloe A,
having a circumferential channel B, more than sufficiently deep to receive a solid
or other tyre C, say for example an india rubber "cushion" tyre as shewn, that is
a tyre of somewhat large section having a central bore or hollow. Between the
outer cushion or solid tyre C and the base of the felloe A, we arrange say two
circumferential parallel tubes D D covered with canvas or other material E,
indicated in the drawing by the black lines, so as to enable the said tubes to be
inflated without undue extension; wire gauze may in some cases be employed
instead of canvas. An ordinary or suitable valve or valves (not shewn), is or are
provided, by which the said parallel air tubes D D may be inflated. In some cases
the air tubes D D may be scaled and the use of valves thus rendered unnecessary.
The outer cushion or solid tyre C is secured in place by cementing same to, say the
canvas covering E of the air tubes D D, or it may be held in place by means of
well known spring wires passed centrally through such tyre.
The parallel air tubes D D, are sprung into position before the ends of the canvas
covering E are joined.
Instead of providing two separate air tubes D D we may provide but onc, as
shewn at Fig. 2 and marked D, this latter being of a size to cover or line the
interior of the channel of the rim A, and form a resilient seating for the solid or
cushion tyre C.
The air tube D may be caused to assume say a crescent section, and receive
between the crescent arms thereof the solid or cushion tyre C, which latter can
be secured in place in any approved manner, the elastic inward pressure of the
tyre C serving to maintain the crescent section of the air tube D.
A tyre of elliptical section is shewn at Fig. 3 formed with a larger central
aperture and resting on an inflated tube D. A tape or band E¹ extends
circumferentially above the inflated tube D, and maintains its crescent section.
By our invention we are enabled to produce a tyre possessing nearly all the
resiliency of the usual air inflated tyre, while at the same time puncture is rendered
practically impossible, and the "life" of the tyre is increased."
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is
1. In elastic tyres for velocipedes and other road vehicles, the application of
closed or inflated elastic tubes or chambers. located between an outer solid or

page_text: "cushion tyre" and the base of the felloe, constructed and arranged substantially
as described and illustrated with reference to Fig. 1 of the accompanying drawings.
2. In elastic tyres for velocipedes and other road vehicles, the application of an
inflated or sealed elastic air chamber located between an outer solid or "cushion"
tyre and the base of the felloe, constructed and arranged substantially as described
and illustrated with reference to Figs. 2 and 3 of the accompanying drawings.
3. The construction, arrangement and combination of parts composing our
improvements in or connected th elastic tyres for the wheels of velocipedes and
other road vehicles all substantially as hereinbefore described.
Dated this 15th day of February 1897.
BREWER & SON,
London and Leeds, Agents for the Applicants.