Improvements in and relating to Pneumatic Tyres.
Year: 1897

page_text: Date of Application, 27th Feb., 1897
Complete Specification Left, 26th Nov., 1897-Accepted, 8th Jan., 1898
PROVISIONAL SPECIFICATION.
Improvements in and relating to Pneumatic Tyres.
I, JOHN TOWNSEND TRENCH, of Lansdowne Lodge, Kenmare, County Kerry,
Ireland, Land Agent, do hereby declare the nature of this invention to be as
follows:
:-
This invention relates to an improvement in that type of pneumatic tyre divided
circumferentially at its base or inner side to allow access to its interior for the
purpose of repair.
According to this invention the lining of the body or outer part of the tyre-
which is adapted to make it air tight is made independent of the outer part
thereof and is afterwards solutioned or otherwise fixed thereto to make it integral
therewith after the said outer part has been vulcanised.
The lining has internal radial lips or flanges adapted to come together to make
the air-tight joint, and it is preferably moulded so that the lips or flanges assume
their position naturally. The abutting faces of the lips or flanges are made tacky
by facing them with or forming them of partly cured rubber, or by any other
suitable means so that they will adhere together the one to the other when pressed
together by the ordinary pressure of the fingers, and yet can be readily drawn apart
when it is desired to gain access to the interior of the tyre.
By this construction an air-tight joint between the lips or flanges is assured
before inflation apart from any particular manipulation required to mount the
tyre in or on the wheel rim.
A lining such as described may be attached to the cover of any of the existing
types of tyres so as to convert them into so-called “tubeless tyres.
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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.
E, JOHN TOWNSEND TRENCH of Lansdowne Lodge, Kenmare, County Kerry,
Ireland, Land 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 improvement in that type of pneumatic tyre divided

page_text: circumferentially at its base or inner side to allow access to its interior for the
purpose of repair.
According to this invention the lining of the tyre which is adapted to make
the outer part air-tight-is made independent of the said outer part and is after-
wards solutioned or otherwise fixed thereto to make it integral therewith after the
said outer part has been vulcanised. The lining part has internal radially
arranged lips or flanges adapted to come together to complete the continuity of
its tubular form, the abutting faces of the said lips or flanges being made tacky by
facing them with or forming them of partly cured rubber, or by any other suitable
means so that they will adhere to one another when pressed together and thus
make a temporary joint which is air-tight before inflation and can readily be
broken or opened when it is desired to gain access to the interior of the tyre. On
the inflation of the tyre the lips or flanges become pressed into more intimate
contact by reason of the
pressure of air.
In the accompanying drawing:
i
Figure 1 is a view in transverse section of a pneumatic tyre embodying my
invention.
Figure 2 is a similar view showing an alternative arrangement, and
Figure 3 is a view in transverse section of the lining part of the tyre.
Throughout the views similar parts are marked with like letters of reference.
Referring to the drawings. A designates the outer part of the tyre and B the
wheel rim, both of which present no novel features and may be of any of the well-
known types, the attachment of the tyre to the wheel rim forming no part of this
invention. C designates the inner or lining part of the tyre which is made of
pure rubber and is provided with internal radially arranged lips or flanges c, c,
the abutting faces of which are made to temporally adhere together by being made
of or faced with partly cured rubber or by means of tacky cement or its equivalent
so that while they will adhere to one another on being pressed together, they can
easily be pulled apart when it is desired to gain access to the interior of the tyre.
By this construction a temporary air-tight joint between the lips or flanges is
assured before inflation is commenced apart from any particular manipulation
required to mount the tyre on the wheel rim.
It will be understood that both the lining part C and the outer part A are cured
or vulcanised either wholly or partially before they are solutioned or otherwise
fixed together to make them integral.
By this invention the covers of any of the existing types of double tube tyres
can be converted into so-called "tubeless" tyres.
The lining part C is solutioned or otherwise fixed to the outer part A so that its
edges coincide with the edges of the outer part as shown by Figure 1, and in con-
structions in which the edges of the outer part do not meet or approximate to each
other, the lining part C is preferably fixed to the outer part so that at least one
of its edges coincides with one of the edges of the outer part.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:-
(1) The improvements in and relating to penumatic tyres substantially as
hereinbefore described and illustrated by the accompanying drawing.
(2) In a pneumatic tyre consisting of a divided tube having internally radially
arranged sealing lips or flanges treating the abutting faces of the lips or flanges
so they will adhere to one another when pressed together and so form a temporary
air-tight joint before inflation is commenced, as set forth.
(3) A pneumatic tyre consisting essentially of an outer part A formed of rubber
and canvas or other suitable reinforcing fabric of a tubular form in cross section
and having a thickened and divided base shaped to fit the groove in the wheel
rim, and of an inner or lining part of pure rubber of a tubular form in cross section
and having internal radially arranged lips or flanges the abutting faces of which

page_text: are treated or prepared so that they will adhere to one another on being pressed
together, as and for the purpose set forth.
Dated this 26th of November 1897.
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.