Improvements in Pneumatic Tires and Rims for Wheels.
Year: 1896

page_text: Date of Application, 28th Dec., 1896
Complete Specification Left, 25th Sept., 1897.-Accepted, 4th Dec, 1897
Improvements in Pneumatic Tires and Rims for Wheels.
I, WILLIAM WORBY BEAUMONT of The Outer Temple 222 Strand London, Civil
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in the formation and metliod of holding
tubeless or single tube pneumatic tires on or in the rims of wheels of cycles or other.
vehicles, and to the form of the rims of wheels for carrying these tires, and according
to one form of rim and tire, the rim in the central part of its section is curved or
shaped outwardly instead of inwardly as is. usual, and the spokes are placed in the
outer grooves or channels instead of near the centre as usual.
The edges of the rim are turned inwardly more or less, and of curved or curved
and partly right line book or dovetail form to hold the projecting rib or fillet formed
on the outside edges of the tube or ring forming the tire, or to hold hooks or eyes
attached to the tiro. The extreme edges of the tire ring beyond the part carrying
the rib, are made of or covered with soft or pure rubber, so that they readily
accomodate themselves to, and form an air tight joint along the sides of the
outwardly projecting channel of the rim. When the spokes are put in the centre of
the rim, the rim is made air tight by a curved covering strip or ring of rubber or of
other usual material, suitably cemented or fixed in place over the spoke ends or holes,
and the edges of the tire sit air tight on this.
When the ordinary form of rim is used; I make the rim air tight by similar
suitable means, so that the rim with the tire forms part of the airtight whole. The
tire may be held on by a series of eyes fixed in it, and passing through or into
holes or depressions in the rim, through or into which wires or wire rings pass. The
valve for inflating the tire may be placed in the centre of the rim, and brazed or
screwed or otherwise fastened therein, or it may enter the tire.
December 1906
COMPLETE SPECIFICATION.
Improvements in Pneumatic Tires and Rims for Wheels.
I WILLIAM WORBY BEAUMONT of The Outer Temple 222 Strand in the City of
London Civil engineer do hereby declare the nature of this invention and in what
manner the same is to be perforined, to be particularly described and ascertained in
and by the following statement :--
My invention relates to improvements in the formation and method of holding
tubeless pneumatic tires on or in the rims of wheels of cycles or other vehicles and to
the form of the rims of wheels for carrying these tires and according to one form of rim
and tire the rim in the central part of its section is curved or shaped outwardly instead of

page_text: inwardly as is usual and the spokes are placed in the outer grooves or channels instead of
near the centre as usual. The edges of the rim are turned inwardly to hold the
projecting rib or fillet formed on the outside edges of the rubber and fabric ring of
saddle section forming the tire. The extreme edges of the tire ring beyond the part
carrying the rib are made of or covered with soft or pure rubber so that they readily
accommodate themselves to & form an air tight joint along the sides of the
outwardly projecting channel of the rim. The valve for inflating the tire may be
placed in the centre of the rim and brazed or screw fastened therein.
In the drawing hereto Fig. 1 shows a section of a rim and tire according to my
invention and Fig. 2 a modification of the rim according to which the outwardly
projecting.central part is made separately as a split ring sprung into place and brazed or
otherwise connected to form a complete ring and part of the rim when in place and it may
be brazed into the wider part of the rim. Fig. 3 shows portion of a tire before insertion
into a rim-In Fig. 1. A is the rim having the outwardly projecting central part B against
which the thin lips formed as at C or C of the saddle tire D make air tight joints on the
principle of the hydraulic cup leather. The greater part or the extremity of the
lips C or C is thin and before being put into the rim stands out at rather less than
a right angle from the tire as indicated by Fig. 3. When put into the rim they are
driven by the air into the narrow channels into which they are jammed and assume
the cup leather section, the channels being deeper than those hitherto used: The
tire is inade of rubber and fabric preferably such as the Palmer fabric and by
processes well known to rubber manufacturers-The air adinission valve and tube are
shown at E E as brazed or hard soldered into the outwardly projecting.central part B
of the rim-The spokes are shown at FF and the nipples holding them at FI F¹.
The small space above the nipple heads at G G and the space unoccupied between
them in the rim may be filled with cement or any suitable composition. When the
central channel section outwardly projecting part B of the rim is made separately as
in Fig. 2 it may be placed as shown or may be inverted so that the two edges of the
channel stand outwards.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be carried into effect, I declare that I am aware
that single tube pneumatic tires of approximately circular form have been described
and shown which were intended to be kept air tight by means of a lip on one side or
edge of a slit tube which lip sat on the other side or edge and so formed a tubular
tire of approximately circular section, and also tubular tires in which one edge of
a slit tube sat and was cemented in the one side of a single channel rim and the other
edge was made to sit in the other side of the same channel with the object of making
an air tight joint and these and such forms of tire and rim I do not claim but
what I do claim as my invention is:-
The tubeless pneumatic tire the two edges of which are held in two separate deep
channels or grooves in a rim of the forms shown and making two air tight joints by
means of two thin lips sitting cup leather fashion in two channels and on the sides of
a central outwardly projecting metallic channel rib forming part of the rim and
carrying the air inlet tube the spokes being placed in the bottom of inwardly
projecting channels of the rim and the depth of the side channels or grooves formed
in the rim being large in comparison with the thickness of the tire so that the air with
which the tire is inflated shall drive the cup-leather-formed edges.into the two rim
channels, and thus make the two edges fit tight into two separate channels
substantially as herein described and shown.
D94th dow of Santahan jonz