Year: 1897

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883) as required by
the decision of the Comptroller General of the 2nd day of May 1898.
Date of Application, 12th Jan., 1897
Complete Specification Left, 12th Oct., 1897-Accepted, 4th Dec.,
1897
I, JOHN TOWNSEND TRENCH, of Kenmare, Co. Kerry, Ireland, Land Agent, do
hereby declare the nature of this invention to be as follows:-
66
"
This invention relates to an improved construction of tubeless pneumatic
tyre and wheel rim therefor.
According to my present invention the tyre is constructed of rubber and canvas
or other reinforcing fabric in the manner now well known and on its edges or
margins are formed or fixed enlargements adapted to engage with recesses or their
equivalents formed on or in the inner or what is usually the convex side of the
rim, the said enlarged edges being kept engaged and so locked to the wheel rim
by means of hoops, bands, clips, hooks or equivalent devices.
On the outer side of the rim is mounted or fixed a band made wholly or partially
of rubber preferably engaging with the edges of the rim and projecting beyond
the said edges in such a manner as to form Haps which will engage with the inner
surface of the tyre near the edges thereof-when the tyre is mounted on the
wheel rim and so make the tyre air tight independent of its attachment to the
wheel and before inflation is commenced.
1
AN
ROBERT E. PHILLIPS, Asoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer & Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.
I, JOHN TOWNSEND TRENCH, of Kenmare, Co. 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 improved construction of "tubeless" pneumatic
tyre and wheel rim therefor.
According to my present invention the tyre is constructed of rubber and canvas
or other reinforcing fabric in the manner now well-known and is faced on its inner
surface with pure rubber so as to make it air tight. The edges of the tyre are
[Price 8d.1

page_text: .
enlarged to engage with recesses or their equivalents formed on or in the inner
or what is usually the convex side of the rim, the said .enlarged edges being kept
engaged with and fixed to the wheel rim by means of hoops, bands, clips, hooks or
equivalent devices. The continuity of the tubular form of the tyre is completed
by means of a band of rubber engaging with the outer face of the wheel rim.
In the accompanying drawing; Figures 1 and 2 are views in transverse section
showing by way of example-two methods of carrying this invention into
practical effect.
In both views similar parts are marked with like letters of reference.
b
On the outer face of the rim A is mounted or fixed a band B of rubber or like
material which is so shaped that it engages with and encloses the edges of the rim,
the projecting edges or margins of the band forming flaps or tongues 6 adapted to
engage with the inner surface of the tyre C when it is mounted on the wheel rim
by which a seal or an air tight joint is made between the edges of the tyre, thus
completing its tubular form.
The tyre C which is formed of rubber reinforced with canvas or other fabric in
the well-known manner is lined with rubber so as to be air-proof, and its edges c
are enlarged to engage with circumferential recesses a on the inner face of the
wheel rim A. with which they are kept engaged by means of hoops, bands or equiva-
lent devices D. The hoops or bands may either be of the collapsible type as
exemplified in Pickel's Patent No. 18126 of 1892 or of the endless band type as
exemplified in Phillip's Patent No. 19073 of 1892, but I wish it to be understood
that I do not claim any particular form of hoop or band per se.
It will be seen that in this construction of tyre an initial seal or air-tight joint
is obtained both mechanically by means of the attachment or fixing of the tyre
to the wheel rim, and also automatically by means of the flaps or tongues at the
edges of the flexible band on the wheel rim.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
(1) The improved pneumatic tyre, as herein described and illustrated by the
accompanying drawing.
(2) The combination with a wheel rim, of a flexible band such as B having flaps
or tongues such as b at its edges, of a pneumatic tyre such as C, and of means for
attaching or fixing the edges of the said tyre to the inner side of the wheel rim, as
and for the purpose set forth.
(3) A tubeless pneumatic tyre consisting of a rim such as A, of a flexible band
such as B mounted on the rim and having its edges or margins arranged to form
flaps or tongues b, of a tyre such as C the edges of which are adapted to be fixed to
the inner face of the wheel rim by means of bands or hoops such as D, as set forth.
Dated this 12th day of October 1897.