Improvements in Pneumatic Tyres and Wheel Rims for Velociped es and other like Vehicles.
Year: 1896

page_text: Date of Application, 13th Nov., 1896
Complete Specification Left, 11th Aug., 1897-Accepted, 13th Nov., 1897
Improvements in Pneumatic Tyres and Wheel Rims for Velociped es
and other like Vehicles.
1, JOHN TOWNSEND TRENCH of Kenmare, County Kerry, Ireland, Land Agent,
do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved construction of pneumatic tyre and wheel
rim therefor.
The wheel rim which may be either of the solid or hollow type has its edges
inturned to constrict the width of the mouth of the groove therein and on the
bottom of the said groove at the centre thereof is formed or fixed a ridge of an
inverted V or similar or other suitable shape forming a divided groove.
The tyre which is of the tubeless type-has its enlarged edges so shaped
that they each fit in its respective half of the divided groove of the wheel rim so
that they are each independently caused to seat themselves in the wheel rim
in the manner intended and the removal of one of the said edges does not interfere
with the seating of the other.
The tyre is made air-tight by means of a lining of rubber which is fixed to
the cover after it has been vulcanized or otherwise constructed by means of rubler
solution the edges of the said lining being shaped to form internal or radial
flanges of a cone-shape in cross section the said flanges being so arranged that
they incline and project slightly over the edges of the cover when the lining is
solutioned thereto, so that when the edges of the cover are seated in a wheel rim
the said radial flanges are pressed firmly against each other and form an air-tight
joint around the divided edges of the tyre.
1911. of Navambor 1896A
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 Pneumatic Tyres and Wheel Rims for Velocipedes
and other like Vehicles.
I, JOHN TOWNSEND TRENCH of 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 construction of pneumatic tyre and wheel

page_text: The wheel rim--which may be either of the solid or hollow type has its edges
inturned to constrict the width of the mouth of the groove therein and on the
bottom of the said groove at the centre thereof is formed or fixed a ridge of an
inverted V or other suitable shape adapted to divide the groove into two parts.
The tyre which is of the "tubeless type-has enlarged edges so shaped that
they each fit in its respective half of the divided groove in the wheel rim, so that
they each independently seat themselves, in the wheel rim, and the removal of
one of them does not interfere with the seating of the other.
The tyre is made air-tight by means of a lining of rubber which is fixed to its
inner surface after it has been vulcanised by means of rubber solution, the edges
of the said lining being shaped to form internal radial, flanges of a cone-shaped
in cross section, the said flanges being arranged to incline and project slightly
over the edges of the tyre, so that when, the tyre. is seated in a wheel rim the
said radial flanges are pressed firmly against each other and form an air-tight
joint between the edges of the tyre.
In the accompanying drawing which, illustrates this invention:
;
Figure 1 is a view in transverse section showing the tyre seated in the wheel
rim.
Figure 2 is a similar view with one of the edges or margins of the tyre dis-
mounted.
Figures 3, 4 and 5 are views in transverse section showing modifications of
the wheel rim, and
Figure 6 is a view in transverse section of the air-tight lining of the tyre.
Throughout the views similar parts are marked with like letters of reference.
The wheel rim A-which may be either of the solid type as shown by Figures 1
and 5, or of the hollow type as shown by Figures 3 and 4 has its edges a inturned
to constrict the mouth of the groove therein, and on the bottom of the said groove
which is preferably flat-is formed or fixed a circumferential ridge a¹ of an
inverted V or other suitable shape as shown by Figures 1, 2 and 3. As a modifica-
tion two such ridges may be employed as shown by Figure 4. Instead of making
the ridge a a continuous one, it may be made of a series of projections a etc.
which are preferably of conical form and are stamped or pressed up out of the
flat. As a further modification the projections may take the form of pins a
rivetted or otherwise fixed to the bottom of the groove in the rin in any suitable
way.
The tyre which is of the "tubeless" type--consists of an outer part B and a
lining part B. The outer part B is constructed of rubber and canvas in the
well-known manner and has its edges or margins 6 shaped to adapt them to engage
with and fit in one half of the divided groove of the wheel rim, so that they are
each independently seated therein and the removal of one of them does not
interfere with the seating of the other. The lining part B which is made of pure
rubber, or other suitable air proof material, is fixed to the outer part B by means
of rubber solution or the like after the said part has been vulcanised.
lining part 1 carries at its edges internal radially arranged flanges b' which form
the seal when the tyre is mounted in the wheel rim. To make the seal effective
the flanges b' are made of a cone shape in cross section as shown in Figure 6 and
are so arranged that they incline and project slightly over the edges of the outer
part B when the lining B is mounted thereon as shown in Figure 2, whereby
they abut against each other firmly when the tyre is seated in the wheel rim.
This
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 pneumatic tyres and wheel rims, as herein specified
and shown by the accompanying drawing.
(2) A wheel rim for pneumatic tyres having one or more circumferentially

page_text: arranged ridges or series of projections, at the bottom of its groove, a's and for
the purpose set forth.
(3) A wheel rim for pneumatic tyres having inturned edges and one or more
circumferentially arranged ridges or series of projections at the bottom of its
groove, as and for the purpose set forth.
4. In combination a wheel rim having inturned edges and one or more circum-
ferentially arranged ridges or series of projections at the bottom of its groove, and
a "tubeless" pneumatic tyre consisting of an outer part having its edges shaped
to fit respectively between the inturned edges of the wheel rim and the circum-
ferentially arranged ridges or projections in the groove thereof, and of an inner
or lining part fixed to the outer part after the said outer part has been vulcanised
and carrying internal radially arranged flanges shaped and arranged so as to
form a seal when the tyre is sealed in the wheel rim, as and for the purpose set
forth.
100
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.