Improvements in and relating to Pneumatic Tyres.
Year: 1897

page_text: Date of Application, 9th Mar., 1897
Complete Specification Left, 9th Dec., 1897-Accepted, 29th Jan., 1898
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 improved method of temporarily attaching pneu-
matic tyres to wheel rims and of forming an air-tight joint between the said tyre
and the wheel rim.
According to this invention the edges of the wheel rim are turned or bent over
so as to form grooves or channels on its inner side and on to the said inner side are
attached a series of small plates adapted to form two continuous strips or hoops
partly covering the grooves or channels at the edges of the rim and so clamp and
retain within them the edges of the tyre which are enlarged and shaped for the
purpose.
The small plates are attached to the wheel rim by means of small screws or their
equivalents.
.
To ensure the edges of the tyre making an air-tight joint with the wheel rim,
bands of rubber are so mounted on the edges of the rim that their overlapping
edges have a contractile pressure on the edges of the tyre & so exert sufficient
pressure to ensure an air-tight joint before inflation is commenced. These bands
may if desired extend across the width of the wheel rim in which case they can
conveniently be made in one.
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 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 method of temporarily attaching pneu-
matic tyres to wheel rims and of forming an air-tight joint between the said tyre
and the wheel rim.
In the accompanying drawing which illustrates this invention:-
Figure 1 is a view in transverse section.

page_text: Figures 3 and 4 are views in transverse section-on an enlarged scale--showing
modifications.
Throughout the views similar parts are marked with like letters of reference.
According to this invention the edges a a of the wheel rim A are turned or
bent over so as to form grooves or channels a¹ a¹ on its inner side, and on to the
said inner side are attached a series of small plates B adapted to form two continu-
ous strips or hoops partly covering the grooves or channels a' at the edges of the
rim and thus retain within them the edges c of the tyre C which are enlarged and
shaped for the purpose. A convenient method of attaching the plates B to the
wheel rim A is by means of small studs or screws such as b.
To ensure the edges c of the tyre C making an air-tight joint with the wheel
rim A before inflation is commenced, and to ensure the rim itself being air tight,
a band D of rubber is attached to the rim A, the edges d d of the said band being
arranged so as to form sealing lips, which engage with the inner surface of the
tyre.
The bands I may either be cemented to the rims or they may be made of such
a size and shape that they will retain their position thereon by reason of their
elasticity.
As a modification the sealing lips d d may be made independent of the band 1)
and be formed on or attached to the inner surface of the tyre C as shown by
Figure 4.
As a further modification two hoops or bands B' B' may be substituted for the
plates B as shown by Figures 3 and 4.
Having now particularly described and a retained 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 improvements in and relating to pneumatic tyres, substantially as hercin
specified and illustrated by the accompanying drawing.
(2) A tubeless pneumatic tyre characterised by its edges being attached to the
wheel rim by means of plates or their equivalents on the inner face of the rim,
and by the air seal between the two edges of the tyre being made by means
of a strip or band of rubber mounted on the wheel rim and having its edges or mar-
gins extending beyond the edges of the wheel rim, so as to engage with the inner
surface of the tyre, as set forth.
(3) A tubeless pneumatic tyre characterised by its edges being attached to the
wheel rim by means of plates or their equivalents on the inner face of the rim,
and by the air seal between the two edges of the tyre being made by means of
strips or bands of rubber mounted or formed on the inner surface of the tyre and
so arranged that their edges or margins engage with the edges of the wheel rim,
as set forth.
Dated this yɩn day or December 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.