An Improved Air-tube for Pneumatic Tyres.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
An Improved Air-tube for Pneumatic Tyres.
JOHN MCAULIFFE LONG 48 Barton Arcade Manchester Agent do hereby declare
the nature of this invention to be as follows:-
An invention having for its object the improvement in the inner core or air
tube commonly used in pneumatic tyres of cycles & other road vehicles.
I form the tube A (see drawings) of rubber or other suitable material. To its
outer periphery I attach longitudinally at the point 1', with cement or other
means, a loose heel piece or false bottom of rubber G, preferably of about the
width of half the circumference of the tube A.
I inflate the tube A by means of a valve B which is attached to a small flexible
rubber pipe C opening into tube A. This pipe passes through a piece of screwed
metal tubing D, which metal tube is first attached by means of a flange DX,
& screwed washer to the heelpiece G; then, by means of a screwed washer H,
the whole is fixed to the felloe or rim of wheel K. The said metal tube D having
an inside diameter large enough to allow the pipe C & valve B to pass freely
through.
Should the tube A become punctured & collapse, I push valve B well up into
the metal tube D, & 1 attach, by means of a screwed cap L, a second valve AM.
I then inflate by means of valve M through the tube D into the recess formed by
the lower half of tube A & the heelpiece G, thus doubling up the tube A, as
shown in Fig. 2, which forms, with heelpiece 6, a new air tight chamber 0.
Fig. 1 shows air tube inflated previous to puncture.
Fig. 2 shows tube inflated by means of second valve after being punctured.
Fig. 3 shows air tube without valves attached.
I, JOHN MCAULIFFE LONG (Agent) of 20 Cross Street (late 48 Barton Arcade)
Manchester do hereby declare the nature of this invention and in what manner
O the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
An invention having for its object an improvement in the inner core, or air
tube, commonly used in the pneumatic tyres of cycles and other road vehicles.

page_text: I form the tube A (see drawings filed with my Provisional Specification dated
December 15th 1896) of rubber, or other suitable material.
To its outer periphery I attach longitudinally at the point P, with cement, or
other suitable means, a loose heel piece, or false bottom of rubber G, preferably of
about the width of half the circumference of the tube A. I inflate the tube A by
means of a valve B, which is attached to a small flexible rubber pipe C opening
into the tube A. This pipe passes through a piece of screwed metal tubing D,
which metal tube is first attached by means of a flange DX, and screwed washer
to the heel-piece G; then by means of a screwed washer H the whole is fixed to
the felloe or rim of wheel K. The said metal tube D having an inside diameter
large enough to allow the pipe C, & the valve B, to pass freely through.
Should the tube A become punctured and collapse, I push valve B well up into
the metal tube D, and I attach by means of a screwed cap L a second valve M. I
then inflate by means of valve if through the tube 1) into the recess formed by
the lower half of tube A and the heel piece G; thus doubling up the tube A as
shown in Figure two (2), which forms with the heel piece a new air tight
chamber Q.
Fig. 1 shows the tube inflated previous to puncture.
Fig. 2 shows the tube inflated by means of second valve after being punctured.
Fig. 3 shows the air tube without valves attached.
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:
An air tube having attached at a point (see drawings) at about one half its
outsid circumference a loose web of rubber, or other suitable material, so as to
form with the half of tube that is nearest to rim a recess capable of holding air
under pressure after the upper, or tread, portion, of the tube has been punctured;
and into which no air is admitted until such puncture takes place as to render
the first chamber incapable of holding air.
I also claim the arrangement of valves herein described (not the valves them-
selves, which may be of any suitable kind) to enable the chambers to be inflated
through one aperture in the rim or felloe of wheel.
Dated this Fifteenth day of September One thousand eight hundred and ninety-
seren
JOHN MCAULIFFE LONG