Improvements in Tyres for the Wheels of Bicycles, Tricycles, and other Vehicles.
Year: 1892

page_text: -Date of Application, 11th Feb., 1892
Complete Specification Left, 11th Oct., 1892-Accepted, 12th Nov., 1892
PROVISIONAL, SPECIFICATION.
Improvements in Tyres for the Wheels of Bicycles, Tricycles, and
other Vehicles.
I, JOHN BAGNALL, of Stamford Road, Bowdon, in the County of Chester,
Manager, do hereby declare the nature of this invention to be as follows:-
This invention is designed to provide a light rubber cushion tyre which will not.
be liable to flatten under pressure and will be more elastic than many of those at
present in use.
It consists essentially of a tyre constructed with an outer tube of hard rubber
and an inner one composed of a mixture of indiarubber and granulated cork.
In carrying out the invention I construct a tube in the ordinary way of a suitable
hard rubber and as the same comes from the forming machine I insert therein a
compound of indiarubber and finely ground cork which is a very light and elastic
substance.
The cork is mixed with the rubber when the latter is in a soft plastic condition
and passed through a machine, the dies or moulds of which are rather less than of
the tube machine so that when formed it can pass on to form the interior of the
tube made in the other machine.
The whole can then be finished or vulcanised to the required degree in the
ordinary manner.
Deted this 10th day of February 1892.
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Tyres for the Wheels of Bicycles, Tricycles, and
other Vehicles.
I, JOHN BAGNALL, of Kings Road, Wimbledon, in the County of Surrey,
Manager, 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 is designed to provide a light rubber tyre which will not be liable
to flatten under pressure and will be more elastic than many of those at present
in use.
It consists essentially of a tyre constructed of a composition of rubber and
granulated cork preferably with an outer surface or tread of pure rubber and an
inner core composed of a mixture of rubber and granulated cork.
It will be fully described with reference to the accompanying drawings in which
as an example the invention is shown in the preferred form.
Fig. 1. shows a longitudinal section.
Fig. 2, shows a transverse section.
The outer surface or tread A of pure rubber is produced by forming a tube in
the ordinary way from rubber of the desired consistency.
Into this tube I insert as it issues from the forming machine a core B consisting
of a compound of rubber and granulated cork in a more or less plastic condition
which fills up the interior of the hollow tube adhering to it and forming with it a
solid elastic tyre.
The compound of rubber and granulated cork is a very light and elastic material
and the cord or core B is produced by mixing with the rubber when it is in a soft

page_text: plastic condition the granulated cork the granules 6 of which are intimately mixed
through the compound. This while still in the soft plastic condition is passed
through an ordinary forming machine the dies or moulds of which are somewhat
smaller than those of the tube machine in which the other part A of the tyre
is made.
The cord thus formed can pass forward to form the core or interior of the tube
made in the other machine.
The cord being placed into the interior of the tube to form a core when one or
both are in the green or uncured state the one adheres to the other and the whole
is then finished or vulcanised to the required degree in the usual manner.
The tyre however may be formed of the cord composed of the compound of
rubber and granulated cork which will produce a good non slipping tyre.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A tyre for the wheels of bicycles tricycles and other vehicles consisting of a
cord composed of a compound of rubber and granulated cork substantially as
described.
--
2. A tyre for the wheels of bicycles tricycles and other similar vehicles con-
structed with an outer surface or tread of pure rubber and an inner core composed
of a composition of rubber and granulated cork substantially as described.
3. A tyre for the wheels of bicycles tricycles or other vehicles constructed and
manufactured substantially as and for the purposes described.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.

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