Improvements in and relating to Pneumatic Tyres.
Year: 1896

page_text: Date of Application, 22nd July, 1896
Complete Specification Left, 22nd Apr., 1897-Accepted, 29th May, 1897
PROVISIONAL SPECIFICATION.
Improvements in and relating to Pneumatic Tyres.
I, THOMAS JOHN RICKARD of 61, Morden Road, Maidee, Newport, in the
County of Monmouthshire, Cycle Agent, do hereby declare the nature of this
invention to be as follows:-
This invention relates to an improved method of constructing air tubes for
pneumatic tyres or single tube pneumatic tyres in the form of an annular tuhe,
the object being to avoid the necessity of making a solution joint such as is
necessary when air tubes are made up out of lengths of vulcanized tube.
According to my invention I produce a tube of raw rubber, in any convenient
manner, preferably by the use of a tube machine, using French chalk or similar
material to prevent the inner sides of the tube sticking together. A suitable
length of this tube of raw rubber is cut off and its inner edges are cleansed from
the French chalk or other similar material used to prevent them sticking together,
and after a suitable quantity of ammonia is inserted in it its ends are brought
together over an internal ferrule or tube and the joint is then pressed together
either without or in combination with an exterior band of raw rubber placed
around the outside of the said joint. After a sufficient quantity of water and
air has been introduced into the tube it is ready for vulcanization in the ordinary
manner.
By the use of the internal ferrule or tube the edges can be kneaded or rolled
to ensure a perfect joint without any fear of the inner sides of the tube adhering
together.
These ferrules or tubes may be made of any suitable material but I prefer to
make them of paper, such as ordinary tracing paper, as I find from experience
that such paper is destroyed during the process of vulcanization and therefore
nothing hard or unstretchable remains within the tube when it is completed.
Although I prefer to use papers for these internal ferrules or tubes they can be
conveniently made of other material, such for instance as gutta percha tissue or
thin linen fabric, but when the tubes are made of a material which is not destroyed
in the process of vulcanization or which will adhere to the interior of the tube,
they should preferably be made of some material which is elastic.
Dated 20m
T1000
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.
Improvements in and relating to Pneumatic Tyres.
I, THOMAS JOHN RICKARD of 61, Morden Road, Maidee, Newport, in the
County of Monmouth, Cycle Agent, 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 an improved process of constructing air tubes for

page_text: pneumatic tyres in the form of annular tubes, the object being to avoid the
necessity of making a solution joint such as is necessary when air tubes are made
up out of lengths of vulcanised tube.
According to my invention I produce a tube of raw rubber, in any convenient
manner, preferably by the use of a tube machine, using French chalk or similar
material to prevent the inner sides of the tube sticking together. A suitable
length of this tube of raw rubber is cut off and after its inner edges have been
cleansed from the French chalk or other material used to prevent them sticking
together, and after a suitable quantity of ammonia is inserted in it, its ends are
brought together over an internal ferrule or tube to form a hutt joint. Over this
joint may if desired be laid a thin band of raw rubber to give increased security
to the joint. The joint is then well pressed or kneaded by means of a roller or
other device.
After a sufficient quantity of water and air has been introduced into the tube it
is ready to be vulcanised in a mould in the ordinary manner.
By the use of the internal ferrule or tube the joint can be well pressed or
kneaded without any fear of the inner sides of the tube adhering together.
These ferrules or tubes may be made of any suitable material but I prefer to
make them of thin paper, which I find from experience is destroyed by the heat
during the process of vulcanisation and therefore nothing hard or unstretchable
remains within the tube when it is completed. Although I prefer to use paper for
these internal ferrules or tubes they can be conveniently made of other material,
such for instance as gutta percha tissue or thin linen fabric but when the tubes are
made of a material which is not destroyed by the heat employed in the process of
vulcanisation or which will adhere to the interior of the tube, they should preferably
be made of some material which is elastic.
Air tubes constructed in the manner hereinbefore described are a great
improvement on those at present in use made out of lengths of vulcanised
tube as having no solutioned joint they are less liable to leak and being moulded
to the approximate shape they will assume in use they do not become unduly
stretched, which makes then more liable to become punctured.
From a manufacturers point of view tubes manufactured as hereinbefore specified
have the advantage that they cost less to produce than those made from lengths of
vulcanised tubes, as there is no waste of material and no wrapping with fabric
required whereby cheaper labour may be employed.
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 improved process of manufacturing air tubes for pneumatic tyres,
substantially as herein specified.
(2.) The use in the manufacture of moulded annular air tubes for pueumatic
tyres of internal ferrules or tubes, as herein specified.
(3.) As an improved article of manufacture, air tubes manufactured in the manner
herein specified.
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.