Improvements in and connected with Pneumatic Tyres.
Year: 1896

page_text: Date of Application, 24th Apr., 1896
PROVISIONAL SPECIFICATION.
Improvements in and connected with Pneumatic Tyres.
1, ROBERT REID, of A'Becket Street, Melbourne, in the Colony of Victoria,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to that class of pneumatic tyres the inflation of which is
effected by means of air balls enclosed within an outer covering or jacket the object
being to provide means whereby any one of the balls, should it be punctured, can
be easily and quickly replaced without removing the tyre from the rim.
According to my invention I employ a number of elastic air bags the openings.
of which are provided with plugs internally and externally scrow-threaded and
furnished with air valves. The rim is formed with screw-threaded openings at
suitable distances apart, say midway between each two spokes, to allow of the plugs
of the air bags being screwed therein.
To inflate the tyre the outer covering is first attached to the rim (although it may
be put on after the air bags are in position) and the air bags are then pushed
through the openings from the inner periphery of the rim and screwed therein and
when all the air bags are inserted they are inflated. By this construction if an
inflated ball be punctured it can be easily removed and replaced by another, it
being advisable, however, to partially deflate the contiguous ball. It will of
course be understood that if only one ball be punctured it would not he absolutely
necessary to replace it as the other balls would expand and the outer covering
would, for all practical purposes, be fully inflated.
Dated the 4th do of Anvil 1908
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant..
Improvements in and connected with Pneumatic Tyres.
I, ROBERT REID, of A'Becket Street, Melbourne, in the Colony of Victoria,
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:-
This invention relates to that class of pneumatic tyres wherein the outer covering
is distended by means of air bags enclosed within the covering ur jacket the object
being to provide means whereby any one of the bags should it be punctured, can be
easily and quickly replaced without removing the tyre from the rim.
According to my invention 1 employ a number of elastic air bags the openings
of which are provided with plugs internally and externally screw-threaded and
furnished with air valves. The rim is formed with screw-threaded openings at
suitable distances apart, say midway between each two spokes, to allow of the plugs
of the air bags being screwed therein.

page_text: To enable my invention to be fully understood I will describe it by reference to
the accompanying drawings, in which :-
Figure is an elevation of one' of the elastic air 'bage provided with a plug or
nipple and valve the said bag being shewn uniuflated:
Figure 2 is a vertical section of the same:
Figure 3 is a plan of the plug and valve:
Figure 4 is a longitudinal section; and,
Figure 5 is a transverse section of a wheel rim made according to my invention :
Figure 6 is a longitudinal 'section; and,
Figure 7 is a transverse section of a pneumatic tyre and rim made according to
my invention; aud,
Figure 8 is an underside view of a portion of the tyre cover.
a is one of the elastic air bags the said bag being made preferably of a flattened
pear shape and is the plug or nipple to which the neck of the said elastic air
bag a is secured. The plug is screw-threaded externally as shewn at 61 for
screwing it into a corresponding hole in the rim of the wheel and internally as
shewn at Figure 2 for the attachment of the air pump for inflating the elastic
air bag.
The check valve which I advantageously employ for preventing the deflation of
the air bag a consists of a plug c of suitable material normally held tightly against
the inner opening of the passage 6 through the plug by an elastic band eas
shewn clearly in Figures 2 and 3. 6' is a screw for closing the passage b³ through
the plug b.
d is the rim and d, the openings therein, the said openings being arranged
midway between the consecutive spokes e, e of the wheel. The said holes d' are
screw-threaded to receive the plugs b as shewn clearly in Figures 6 and 7.
fis the outer covering of the tyre within which the elastic air bags are enclosed,
the said outer covering being held in position on the rim by the pressure of the
inflated air bags as shewn clearly in Figure 7 and being divided by a series of
transverse partitions ',' of canvas or other suitable material into a number of
chambers each designed to receive an air bag the said partitions being designed to
prevent the undue distension of the bags. These partitions are attached at their
lower ends to two strips g, g of canvas or other suitable material running around the
periphery of the rim, the said strips being designed to hold the partitions f¹ in
position when the air bage are inflated.
1.
To inflate the tyre the outer covering is first attached to the rim d (although
it may be put on after the air bags a, a are in position) the air bags a are then
pushed through the openings d' from underneath the rim and the plugs bare screwed
tight therein.
When all the air bags a, a are inserted they are each inflated by means of an air
pump the nozzle of which is screwed into the plug b after. the screw 6 has been
removed, the said screw being again screwed into the plug after the inflation of the
air ball a.
With this construction if an inflated air bag be punctured it can be easily
removed and replaced by another. It will of course be understood that if only one
bag be punctured it would not be absolutely necessary to replace it as the other
bag would expand slightly and the tyre would for all practical purposes be fully
inflated.
1 sometimes dispense with the transverse partitious ',' of the outer covering f.
I wish it to be understood that I can employ my air bags in combination with any
suitable outer covering and that I do not confine myself to that shewn in the
drawing.
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. A wheel having a pneumatic tyre consisting of an outer covering enclosing

page_text: a number of elastic air bags having plugs provided with valves and of a rim
having holes through which the elastic air balls can be passed and into which the
plugs can be screwed, substantially as herein before described.
2. In a wheel of the kind described in Claim 1 providing the outer covering with
partitions of a suitable material to prevent the undue distension of the air bags,
substantially as hereinbefore described and illustrated.
3. The manufacture and use of the improved pneumatic tyre and wheel rim.
bereinbefore described and illustrated in Figures 6, 7 and 8 of the accompanying:
drawings.
Dated this 21st day of Januar 1007
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agente for the Applicant..