Improvements in Tyres for the Wheels of Vehicles.
Year: 1892

page_text: Date of Application, 10th Nov., 1892
Complete Specification Left, 31st July, 1893-Accepted, 2nd Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Tyres for the Wheels of Vehicles.
I, JOHN BAGNALL, of King's Road, Wimbledon, in the County of Surrey,
Manager, do hereby declare the nature of this invention to be as follows:-
This invention is designed to provide a rubber or cushion tyre for the wheels of
carriages cabs cycles and other road vehicles which will be more durable than the
soft rubber tyres which have been largely used without appreciably reducing the
resilience of the tyre which is the effect when the soft rubber of the tyre is encased
with a rim or hoop of metal.
It consists essentially of a compound tyre composed of two layers of rubber of
different degrees of hardness the outer layer which forms the surface or tread of
the tyre being harder than the other, being formed of hard vulcanised rubber
whilst the other is formed of soft rubber of the consistency of an ordinary cushion
tyre.
In carrying out the invention the rubber which forms the different layers is
manufactured in the ordinary way. The rubber which is to form the outer layer
or tread is in the course of preparation prepared with more sulphur than is that
from which the inner layer or cushion is to be formed.
The two layers of rubber which are to form the tyre are moulded together
before being vulcanised and the tyre is then vulcanised in the ordinary way.
As the result of this the resulting tyre has a layer of rubber on its outer surface
much harder than that which forms the inner part of the tyre which is produced soft
and elastic.
The compound tyres may be moulded in straight or curved moulds as desired, in
the former case the tyre is removed from the mould while still pliant and bent or
curved to the desired size.
A durable and elastic tyre will be thus constructed which will possess the
advantages of the cushion or solid rubber tyre.
Dated this 9th day of November 1892.
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Tyres for the Wheels of Vehicles.
1, JOHN BAGNALL, of Stockton Street, Moss Side, Manchester, in the County
of Lancaster, Manager, late of King's Road, Wimbledon, in the County of Surrey,
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 rubber or cushion tyre for the wheels of
carriages, cabs, cycles, and other road vehicles which will be more durable than
the soft rubber tyres which have been largely used without appreciably reducing
the resilience of the tyre which is the effect when the soft rubber of the tyre is
encased with a rim or hoop of metal.
It consists essentially of a compound tyre composed of two layers of rubber of
different degrees of hardness the outer layer which forms the surface or tread of
the tyre being harder than the other, being formed of hard vulcanised rubber
whilst the other is formed of soft rubber of the consistency of an ordinary cushion
tvre

page_text: It will be fully described with reference to the accompanying drawings in which
as an example part of a cab or carriage wheel is shown.
Fig. 1, side elevation partly in section.
Fig. 2, transverse section of the tyre.
The rubber which forms the different layers of the tyre is manufactured in the
ordinary way.
That which is to form the outer layer or tread A is in the course
of preparation prepared with more sulphur than is that from which the inner layer
or cushion B is to be formed.
The two layers of rubber A and B which form the tyre are moulded together
before being vulcanised and the tyre is then vulcanised in the ordinary way,
the result being the layer or portion A forming the tread of the tyre with which
the greater proportion of sulphur was mixed is much harder than the other layer
or portion B forming the cushion of the tyre, which is soft and elastic.
The tyre is thus formed with a hard outer or wearing surface and a soft and
elastic cushion behind.
The compound tyres may be moulded in straight or curved moulds as desired, in
the former case the tyre is removed from the mould while still pliant and bent or
curved to the desired size.
A durable and elastic tyre will be thus constructed which will possess the
advantages of the cushion or solid rubber 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 vehicle wheels formed of two layers of rubber moulded together
the layer forming the tread being vulcanised to a much harder degree than the
inner layer which is left soft and elastic substantially as described.
2. In a tyre for vehicle wheels the combination of two layers of rubber moulded
and vulcanised together the one forming the tread being hard and durable and the
other soft and elastic to form a cushion substantially as described and shown.
Dated this 28th day of July 1893.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.