Improvements in and in connection with Pneumatic Tyres.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in and in connection with Pneumatic Tyres.
I, ARTHUR MALTBY, of 8 Hanover Place, Upper Baker Street, London, in the
County of Middlesex, Tailor, do hereby declare the nature of this invention to
be as follows:-
This invention relates to improvements in the design, and materials used in the
construction and manufacture of pneumatic tyres. In carrying this invention into
practice, I form an outer casing or cover of gutta-percha, or the like substances,
with or without a thickened tread.
In using this material the canvas casing can be dispensed with, the material is
moulded into the shape of a tyre and whatever fastening is used to fix tyre to the
rim of wheel, can be embedded in the material, and the outside can be moulded
corrugated or pyramidal. In using the said material it is not necessary to place a
rubber or any other covering outside. In making this tyre in the single tube form
I simply mould the tyre into the required shape, the use of canvas, rubber air
chamber, or outer covering is unnecessary.
This tyre is especially adapted for motor cars, cabs, carriages, obnibuses and
other heavy vehicles.
Dated this 16th day of May 1896.
ARTHUR MALTBY.
COMPLETE SPECIFICATION.
Improvements in and in connection with Pneumatic Tyres.
I, ARTHUR MALTBY of 8 Hanover Place Upper Baker Street London in the
County of Middlesex Tailor 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 improvements in the construction of and the materials
used for pneumatic tyres and for covers for such tyres. The material which I
employ is gutta percha, or gutta percha mixed with asbestos, a suitable proportion
being about of the former to of the latter by weight and either with or without
one or more embedded layers of canvas. The asbestos admixture lightens the
material and renders it less susceptible to the influence of heat, without sensibly
impairing its elasticity. The tread part is thickened and formed so as to prevent
side slip. The tyre is practically puncture proof and is more particularly suitable
for cabs carriages motorcars, omnibuses and other heavy vehicles, and is generally
when so applied made without inflatable inner rubber tube or outer rubber cover.
Fig. 1 is a cross section through a carriage tyre A of the material described
made thicker towards the outside and with a thickened flat tread A¹, and Fig. 14 a
similar one with embedded canvas layer B. The tyre is formed with an inwardly
projecting rib A broadened at the end and adapted to form a cushion when

page_text: pressed against the thin part of the tyre next to the rim or felloe of the wheel.
This kind of tyre is intended to be used with low internal air pressure. I do not
lay separate claim to the rib A².
Fig. 1 shews an outline of the same tyre but having a tread with grooves,
straight or slanting, or crossing each other like a nutmeg grater.
Fig. 1 shews a tread running up to a point.
Fig. 1 shows a tread with fine grooves which may cross each other diagonally.
Fig. 2 is a cross section of a tyre with flat base adapted to be used without
cementing solution for a wheel rim of the flanged form shown. Fig. 2 shows
the same with embedded canvas layer, and Figures 2B 2C and 2" show the same
form of tyre with merely different forms of tread.
Figs. 3, 34, 3B, 3C and 3D show a tyre with another form of flat base and with
similar varieties of tread as those above described.
Figs. 4 4, 4, 4° and 4º show a tyre with narrower inner rib A² and adapted to
a concave rim or felloe.
Figs. 5 and 6 show oval forms of tyre with different forms of flat base,
and Figs. 5 and 6 are corresponding forms with embedded canvas. The tread
may in these cases be varied in form as in the cases already described, the tube A
is not thickened towards the tread as in the previous examples.
Figs. 7, 8, 9, and 10 show a tyre with inner inflatable rubber tube C and an outer
cover D moulded in gutta percha or gutta percha mixture. The tread part shows
the four various forms already described. These tyres Figs. 5. to 10 are
applicable to cycles and other light vehicles, the tyres Figs. 5 and 6 requiring no
cementing solution for fastening same to the wheel rim, while the cover D
in Figs. 8 to 10 is fastened on by wires or the like.
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. The constructions of pneumatic tyre made of gatta percha with or without
admixture of asbestos and with or without canvas embedded in its substance
substantially as described with reference to Figs. 1 to 4.
2. The constructions of pneumatic tyre made of gutta percha with or without
admixture of asbestos and with or without canvas embedded in its substance
substantially as described with reference to Figs. 5 and 6.
3. The constructions of pneumatic tyre covers made of gutta percha with or
without admixture of asbestos and with or without canvas embedded in its substance,
substantially as described with reference to Figs. 7 to 10.
Dated this Eighth day of September 1896.
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.