Improvements in and connected with Pneumatic Tyres and Wheel Rims for Cycles and other Vehicles.
Year: 1897

page_text: Improvements in and connected with Pneumatic Tyres and Wheel
Rims for Cycles and other Vehicles.
I, WILLIAM HERBERT SEWELL, of Portstewart, County Derry, Ireland, Merchant,
do hereby declare the nature of this invention to be as follows:-
The object of my invention is the construction of a wheel rim or tyre, more
simple, durable, and economical than those at present in use, whilst at same time
more effectively accomplishing the object which render pneumatic tyred wheels
desirable, viz. — -The absorbing of vibration and a reduction of the power necessary
to propulsion.
In carrying out my invention I use open segments or basins attached to, or
mounted on, rim. The circumferential air tube or chamber within rim is of
sufficiently elastic material as would enable it, when inflated, to project or breast
itself into the open hollow of the basin-shaped segment, and so distend and stiffen
the walls of same as to afford any desired bearing power.
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1907
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Patent Agents.
Improvements in and connected with Pneumatic Tyres and Wheel
Rims for Cycles and other Vehicles.
I, WILLIAM HERBERT SEWELL, of Portstewart, County Derry, Ireland, Merchant,
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:-
-
The object of my invention is the construction of a wheel rim or tyre, more
simple, durable, and economical than those at present in use, whilst at same time
more effectively accomplishing the object which render pneumatic tyred wheels
desirable, viz.The absorbing of vibration and a reduction of the power necessary
to propulsion.
In carrying out my invention, I provide a tubular rim having openings on the
ground face into which there are placed open or basin-shaped segments. Within
the hollow of the rim there is an air tube provided with an inflating and deflating
air valve. This tube is sufficiently elastic as to, when inflated, distend itself into
the open hollow of the sections or segments and so provide the walls of same with

page_text: the requisite bearing power. The outer or ground face of the tubular rim may be
either an integral part of same, or may be attachable and detachable, and may be
composed of differing materials, such for instance as a band of leather, canvas, or
other fabric capable of being rigidly attached so as to complete the tubular for-
mation of rim, in such case, the running points or treads may take the form of
basin shaped nests or depressions in same.
I will now describe my invention reference being made to the accompanying
drawings.
Figure 1 is part section and part elevation of part of tyre, constructed according
to my invention.
Figure 2 is a cross section of Figure 1.
Figure 3 depicts the open basin-shaped nests or depressions attached to or form-
ing part of a continuous band, which may form the ground face of wheel rim.
Figure 4 is one form of the open basin-shaped nests or sections.
Figure 5 is another form of open basin-shaped nests or sections but with running
apex protected or shod with small metal arc disc.
Referring to Figures 1, 2, & 6, A is the tubular rim, B the circumferential air
tube with valve C, which when inflated breasts or distends itself into the open
hollow of the basin-shaped segments D, which are held in situ on, or within rim
face by metal rings E (Figures 1 and 2) or by the circumferential pressure of the
inflated air tube on flanges or thickened edges F as shown in Figures 4 and 5.
In Figure 3 the open-shaped basins, nests or depressions, which are attached to,
or form part of a continuous band, constitutes the ground face of wheel rim.
The running apex of the segmentary treads may be protected against puncture
by having a small metal disc or cup G (Figure 5) moulded into or attached to
apex of sections or segments. The introduction of this metal disc or cup G will
also reduce ground contact and therefore ground friction.
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:-
In the tyres of cycles, carriages, and other vehicles the use of a tubular formation
of wheel rim the outer or ground face of which will be provided with hollow nests
or depressions or open or basin-shaped sections or segments attached to or depend-
ing from said ground face of rim and forming the tread, the whole enclosing a cir-
cumferential pneumatic tube of such elasticity as will, when inflated or densified
by means of a valve projecting through wall of rim, enable it to breast or distend
itself into the open hollow of the basin-shaped segments, nests, depressions, or
treads and so provide the walls of same with the requisite pneumatic bearing
power, substantially as described and illustrated on the accompanying sheets of
drawings.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Patent Agents.