Improvements in and relating to Pneumatic Tyres or Wheels for Cycles, Carriages, or other Road Vehicles.
Year: 1893

page_text: Date of Application, 16th Oct., 1893
Complete Specification Left, 14th July, 1894-Accepted, 22nd Sept., 1894.
PROVISIONAL SPECIFICATION.
Improvements in and relating to Pneumatic Tyres or Wheels for
Cycles, Carriages, or other Road Vehicles.
I, ALFRED MACDONALD, Manager of The New Howe Machine Company,
Limited, Bridgeton, Glasgow, Lanarkshire, do hereby declare the nature of my
invention to be as follows:-
This invention has reference to and comprises a new or improved method or
system of constructing the pneumatic wheels or wheel tyres of cycles, carriages, or
other road vehicles, whereby in the event of a puncture, the injured part can be
removed and replaced or remedied in a simple and expeditions manner.
The improvements consist, first, in forming the inner air tubes of pneumatic
tyres or air wheels of cycles carriages or other road vehicles, in a series of
portable and removable sectional parts, so that in the event of any one sectional
part of the tyre or wheel getting punctured, and deflated, this can be removed
and replaced by a separate interchangeable section which would be inflated to
occupy the space vacated by the removed section, and make up the complete tyre
or wheel.
Under one arrangement as applied to road cycles, the improvements consist
in forming the tyre of a series of circumferential sectional parts. Each section
would consist of a piece of tubing with close ends which would be inflated with
compressed air, through a valve, or an internal tube may be used as the air tube,
and have a protecting exterior tube or covering. These sectional tubular parts
would be placed circumferentially end to end round the metal rim of the wheel, and
be protected by an outer circumferential covering of rubber, rubber cloth, or other
suitable material secured at its side edges to the metal rim as hereinafter described,
so as to cover in and protect the pneumatic sections located intermediate between
it and the metal rim.
The inner sectional air tubes would preferably be formed of rubber or rubber
lined canvas, a suitable size being about six inches long and each section be encased
within an outer protecting sectional covering preferably about two inches longer
than the inner air tube so that the ends may overlap each other round the
circumference of wheel. These sections may be made with solid or with capped
ends, or one end may be solid and the other capped. These inner air tubular
sections may be each independently charged or inflated with air, or they may be
all charged from one inner air tube or chamber after being placed in position on
the wheel. This would be effected by forming or fitting a gutter or groove on the
inner metal rim of tyre and making this gutter to be an air chamber or fitting a
tube of rubber, metal or other material in this gutter to form an inner air main
tube. This inner main air inflating tube would be charged with compressed air
through a valve by a pump, and all the sectional air tubes forming the tyre may be
simultaneously inflated from this main tube by opening each of their valves to receive
the air pressure, from the main supply tube, and these valves would each consist of an
outer internal screwed tube with seat at its lower end where it is connected to hollow
section and an inner external screwed tube working into the aforesaid. This inner
tube would be made hollow through its longitudinal centre and be fitted with a small
rubber or other plug between its lower end and a hole or aperture formed in its
side. Thus when the inner tube was screwed down on seat of outer tube by turning
a thumb screw formed on its outer end, the valve would be closed and the section
of tyre would be sealed. But when the tyre section was to be inflated the inner
tube would be screwed upwards or raised and the air would pass through aperture

page_text: These
in inner tube and then through the aperture in seat of outer tube to the air
sectional chamber. Washers and tightening up nuts would be fitted on these valve
tubes at the parts where they pass from the inner tyre section through the outer
covering, to the main air tube; and if desired the regulating end may pass out
through the metal rim of wheel or the gutter on same and an inlet orifice be formed
to centre of tube to receive the pressure air from the main supply tube.
inner sectional air tubes or chambers forming the pneumatic part of tyre, whether
encased in sectional casings or not, would all be enclosed within an outer cover which
would form the tread surface of tyre, and the side edges of this tyre cover would be
secured to the inner metal rim as follows:-The rim would preferably be formed of
a convex or saddle shape at the centre and have the gutter over that part or forming
that part itself, and then come in with a gentle curve on each side and go upwards
circular or scroll ways and then down from the ends to form a hook shape. The outer
covering, which may be rubber faced canvas or other suitable material, would pass
round the inner air sectional tubes and have one of its edges preferably permanently
secured within one of the ends of the metal rim, this edge being preferably formed
of thickened rubber, cord or wire and bent round and encased within scroll and
hooked part of rim. In the other scroll or hooked end or edge of metal rim a
separate cord, wire, strip of rubber or other equivalent would be embedded and
secured and have its one end or edge overlapping and covering the exposed surface
of hooked end of rim and this overlapping part would be fitted with metal plates or
equivalent strips on each side, said plates being either formed each in one circular
piece round rim or in sectional parts; and through eyelet holes in these plates, and
central rubber or other strips, would be secured a series of studs, hooks or
equivalent fastenings. The other edge of the outer tread tyre covering would be
formed with a series of eyelet holes, and these would be threaded or passed over
the studs or hooks so as to attach the edge of tyre to same in a secure and portable
manner. By this arrangement if one of the sections of tyre should get punctured
and deflated the outer covering would only require to be unhooked on its one edge
at that part and the hollow section removed, and be either replaced by a new
interchangeable section, or the elasticity of the others might be sufficient to take
its place.
Dated the 14th October 1893
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
Improvements in and relating to Pneumatic Tyres or Wheels for
Cycles, Carriages, or other Road Vehicles.
1, ALFRED MACDONALD, Manager of The New Howe Machine Company,
Limited, Bridgeton, Glasgow, Lanarkshire, do hereby declare the nature of my 4
invention, and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement in writing that is
to say :-
This invention has reference to improvements in and relating to pneumatic tyres,
and consists in forming said tyres of a series of improved sectional tubular parts 4
placed annularly round the rim, and in having an air tube on the inner side of the
sectional tubes, so that in the event of any section getting punctured, the rider can
still proceed on his way without the remainder of tyre getting deflated.
And in order that my said invention and the manner of performing or carrying
the same into effect or practice may be properly understood, I have hereunto 5
appended an explanatory sheet of drawings in which
Figures 1 and 2 represent longitudinal and transverse sections respectively of a
pneumatic tyre as formed according to my improvements. While

page_text: Figures 3 and 4 represent detached longitudinal and end views of one of my
improved sectional tubes.
a,
Referring to these drawings :-Each section would consist of an inner air inflated
tube a, and an outer protecting tube or cover b. The inner sectional air tube a
would preferably be formed of rubber or rubber lined canvas, and each section a
would be encased within an outer protecting sectional covering or bag 6 of canvas
or other suitable material. The sectional tubes a may be inserted and removed
through a laced part in cover b or the cover may be solutionized on to the inner
tubes and these inner tubes a may be made with solid or with capped ends at a¹
or one end may be solid and the other capped. These inner air tubular sections a
may be each independently charged or inflated with air through a suitable valve
at a² or they may be all charged from one inner air tube or chamber c after being
placed in position on the wheel. This may be effected by forming or fitting a
gutter or groove c' on the inner metal rim of tyre, and fitting a tube of rubber c or
other material in this gutter c¹ to form an inner air main tube. This inner main
air tube would be charged with compressed air through a valve by a pump and all
the sectional air tubes a forming the tyre may be simultaneously inflated from this
main tube by opening each of their valves at a² to receive the air pressure, from
the main supply tube c. When the sectional tubes a are independently inflated, the
tube c would be an ordinary air inflated rubber tube without multiple valves, to
form a cushion for the sectional tubes a b.
The tubes a b and c would be enclosed within an outer cover d of rubber or like
material which would form the tread surface of tyre, and be secured at its ends d¹
to the metal rim c¹ by the pressure of the air tube c or by ordinary tightening
up wires.
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
1 claim is :-
First. A pneumatic tyre constructed and arranged substantially as herein
described in reference to and shown in the accompanying drawings.
Second. The constructing of pneumatic tyres in sectional parts, each section
consisting of an inner air inflated tube, and an outer protecting bag or covering
substantially as herein described in reference to and by way of application shown in
the accompanying drawings.
Dated the 12th July 1894.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.