IMPROVEMENTS IN' THE MANUFACTURE OF INDIA RUBBER TYRES FOR WHEELS OF VELOCIPEDES & OTHER VEHICLES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I HUGH CECIL BIRLEY of Cambridge Street Manchester in the County of
Lancaster, a partner in the firm of Charles Macintosh and Company India Rubber
Manufacturers do hereby declare the nature of my invention for IMPROVEMENTS IN'
THE MANUFACTURE OF INDIA RUBBER TYRES FOR WHEELS OF VELOCIPEDES &
OTHER VEHICLES to be as follows:--
'
The chief object of this invention is to provide a tyre for velocipes which, while
made of a compound quality of India Rubber shall be lighter in weight and more!
elastic than the tyres usually made of compound qualities of Rubber.
The Invention applies to the manufacture of tyres for other kinds of wheel
carriages and trucks.
In preparing the Rubber Cord from which the tyre is formed I leave one or more
holes or cavities throughout the length, in the centre portion of the Cord-or the
same result may be obtained by using porous or spongey rubber in the centre;
portion of the Cord-Having then made from the cord, by joining, the rings of the
necessary size, they are placed, in a plastic state, into a mould, subjected to heavy
pressure, and vulcanized in a compressed state-which not only produces a neat,
and smooth appearance but also makes a more perfect joint.
I am aware that Rubber Tyres for Velocipes have before now been made with-
a hollow centre, but such tyres have not been moulded, and therefore lack the
great accuracy and neatness of finish and perfect security of joint produced by
moulding particularly as regards the joints which are so prominent and imperfect
as to prejudice their sale.
64
t
Having now described the nature of the said invention and the manner of
performing the same, I wish it understood that what I claim and desire to protect
under these letters patent is
The manufacture of an India Rubber tyre for Vehicles, moulded, vulcanized
under pressure, and having a hollow centre, or a porous or spongey centre, as above
described.

page_text: I'HUGH CECIL BIRLEY of Cambridge St. Mancheser in the county of Lancaster,
a partner in the firm of Charles Macintosh & Co India Rubber Manufacturers do
hereby declare the nature of my invention for IMPROVEMENTS IN THE MANUFACTURE
OF INDIA RUBBER TYRES FOR WHEELS OF VELOCIPEDES & OTHER VEHICLES and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:
The chief object of this invention is to provide a tyre for velocipedes which, while
made of a compound quality of India Rubber, shall be lighter in weight and more
elastic than the tyres usually made of compound qualities of Rubber.
The Invention applies to the manufacture of tyres for other kinds of wheel
carriages and trucks.
In preparing the Rubber cord from which the tyre is formed I leave one or more
holes or cavities throughout the length, in the centre portion of the cord or the
same result may be obtained by using porous or spongy rubber in the centre
portion of the cord-Having then made from the cord, by joining, the rings of the.
necessary size they are placed, in a plastic state, into a mould, subjected to a heavy
pressure, and vulcanized in a compressed state-which not only produces a neat
and smooth appearance but also makes a more perfect joint.
a
I am aware that Rubber tyres for Velocipedes have before now been made with
hollow centre, but such tyres-have-not-been-moulded,-and-therefore-lack-the-
great accuracy and neatness of finish and perfect security of joint produced by
moulding particularly as regards the joints which are so prominent and imperfect
as to prejudice their sale.
Having now described the nature of the said invention and the manner of
performing the same, I wish.it understood. that what I claim and desire to protect
under these letters patent is
2
The manufacture of an India Rubber tyre for Vehicles moulded, vulcanized
under pressure, and having a hollow centre, or a porous or spongy centre, as above
described.