Improvements in Inflated Wheel Tires.
Year: 1891

page_text: The decision of the Comptroller-General, of the 6th day of April 1894, allowed,
under Section 18 of the Patents, &c. Act, 1883, an Amendment of this
Specification.
Date of Application, 11th Apr., 1891
Complete Specification Left, 15th July, 1891-Accepted, 15th Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in Inflated Wheel Tires.
EDWARD HENRY SEDDON of Marsland Road, Brooklands in the County of
Chester, Commercial Traveller do hereby declare the nature of this invention to
be as follows:-
This invention relates to flexible wheel-tires of bicycles, tricycles and other road
carriages, having a hollow core and inflated with air or gas under pressure. Such
tires are usually formed of indiarubber and canvas and are secured to the felloes or
rims of the wheels by cement or mechanical means. It is preferable and of general
practice to insert an independent tube of elastic substance into the hollow core of
the tire and to inflate the said tube, which expands the tire to its full body. The
employment of the inner tube facilitates the means for repair should the tube be
punctured in which case it may be removed and repaired or another inserted.
The object of this invention is to improve the construction-first-of the tire in
order to facilitate the means for attaching it to the felloe or rim and to permit of
the inner tube being readily removed, and second-of the inner or inflated tube
to render it less liable to total collapse in the event of puncture, and third-of the
valve to make it less liable to leakage and provide means for the escape of "air"
when it is desired to remove the inner tube or chamber.
Rims or felloes of various forms or sections are employed according to the means
adopted for securing the tires. I prefer to employ a rim of a shallow channel
or U section, but any form of rim having sides thereto is adaptable to my
invention.
In carrying out my invention I form the tire with a continuous open seam along
its underside or side secured to the rim. I prefer to employ a tire having a some-
what flat bottom or underside, or of D shaped section. The edges of the seam may
meet or lap. The corners of the D-sectioned tire may be thickened inside or
stiffened in any convenient manner. The tire fits the felloe and is contained and
prevented from spreading at the base by the walls or sides thereof, and may be
cemented thereto in the ordinary manner. I secure the tire to the rim by passing
a flexible band therethrough around the rim bearing upon the base of the tire, and
secure the two extremities by suitable means. By loosening the band and raising
the tire aside the inner tube may be removed through the seam.
The second portion of my invention consists in the formation of the inner or
inflated tube, which is usually formed of elastic material such as indiarubber. I
construct the tube having two or more separate chambers formed by longitudinal
webs or divisions and I employ a separate valve to each chamber in order that
should one chamber collapse the remaining one or others would expand with or
without an additional injection of air and maintain the full form of the tire. The
said air tube is formed upon the flexible band or attached thereto to facilitate

page_text: insertion and extraction from the tire, but I may employ the tube separate from.
the band if I so desire.
The third portion of my invention consists in the form of non-return valve which
I apply to each chamber of the inner tube. The valve is preferably formed wholly
of rubber and consists of a narrow strip having a longitudinal opening therethrough,
or in form a flattened tube. One end is secured directly or by indirect means to
the outer wall of the air chamber, the whole length of the valve being in the
interior of the chamber.
I prefer to attach to the air-chamber a sleeve having a metal rim. The valve is
formed with a metalic or rigid neck which is secured to the metal rim in such
manner that it may be readily removed to let out the "air" contained in the
chamber. An opening is formed in the felloe into which the sleeve fits and by
which the valve may be used in inflating the chamber or inner tube.
Dated.this 10th day of April 1891.
R. J. URQUHART,
57, Barton Arcade, Manchester, Patent Agent and Consulting Engineer.
COMPLETE SPECIFICATION (AMENDED).
Improvements in Inflated Wheel Tires.
I EDWARD HENRY SEDDON of Marsland Road, Brooklands in the County
of Chester Commercial Traveller 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 flexible tires of bicycles, tricycles and other road vehicles
having a hollow core or tubular section and inflated with air under pressure. Such
tires are usually formed of india rubber and canvas and are secured to the felloes or
rims of the wheels by cement or mechanical means. It is preferable and usual to
insert an independent tube of elastic substance into the hollow core of the tire and
to inflate the said tube which expands the tire to its full sectional size. The
employment of the inner tube facilitates repairs should the tube be punctured, in
which case it may be removed and repaired or another tube inserted. My invention
consists in an improved construction or formation of this inner tube having for its
object to render said tube less liable to total collapse in case of puncture, and-in-an
improved construction of valve for inflating the inner tube by which the valve is
rendered less liable-to-leakage-and-the-air-can readily be allowed to escape when it
is desired to renew the inner-tube.
On the sheet of drawings appended hereunto.
Fig. 1 shows a cross section through the improved tire and the valve for the
lower chamber of said tire.
Fig. 2 a longitudinal view partly in section.
Fig. 3 a cross section of the tire and valve for the upper chamber.
Fig. 4 two-views-of-the-improved-nir valve.
Fig. 5 4 a plan of the clip for fixing the valve socket.
Rims or felloes of various forms or sections may be employed according to the
kind of tire and method for securing the same adopted. By preference I employ a
rim a of a channel or U section with sides a¹ a¹ inclined towards each other as
shewn by Figures 1 and 3, and form the tire with a continuous open seam along
its underside or the side secured to the rim and with a D shaped section as shewn,
and secure the tire to the rim by means of wires d or similar bands embedded in
the tire and drawn together and fastened at the joint of the tire. This arrange-
ment of outer tire is adopted for facilitating the insertion or removal of the
inner or inflated tube f, but other forms of hollow tire capable of receiving an
inner tube may be used, the formation of the outer tire and the method by which it
is secured to the rim not forming part of this invention.

page_text: The first part of My invention consists in the formation of the inner or inflated
tube which is usually formed of elastic material, such as indiarubber, with one or
more longitudinal webs or partitions so as to form two or more separate chambers.
in the inner tube, and I employ a separate valve to each chamber in order that
should one chamber become punctured and collapse, the remaining chamber or
chambers would expand and could be inflated by a further supply of air under
pressure so as to maintain the full section or form of the tire. One partition or
web g is shewn on the drawing, forming two chambers and i. The chamber i has
a tube or socket & cemented and vulcanised to it which passes through a ferrule l
inserted into the rim and slotted in its lower part, being formed with lugs that
can be drawn together by a screw m and thereby made to clip the socket & and
prevent it from turning when the valve is screwed into it. Other suitable devices.
for preventing the socket & from turning may be used. The socket kis tapped
with a screw thread and a valve for inflating the chamber i or letting the air out of
it is screwed into the socket k. This valve may be of any ordinarily used kind but
is preferably constructed as hereinafter described. A tubular passagen, Figs. 2.
and 3, is formed along the inside of the outer wall of the chamber i communicating
at one end with the chamber and at the other with a tube or socket k¹ arranged,.
held and fitted with a valve in the same manner as described with reference to the.
tube k, through which valve the chamber h can be inflated. When the outer part
of the tube becomes injured and collapses by allowing the air in chamber h to.
escape, the air in chamber i will expand and prevent the total collapse of the tire,
and by forcing air into the chamber i, the web g will be laid against the inner
surface of the tube and the chamber i expanded into a circular shape, so that the:
tire 6 will be fully supported again and the cycle can be further used till it is
convenient to take off the tire and repair or renew the tube f. In case of damage
to the tube on its inner part, the chamber h can be inflated in a similar manner..
The web is preferably made of the same width as half the inner circumference of
Instead of one partition g, more of them may be applied forming three or more.
chambers each provided with a valve for inflating the same.
the tube f
The further part of my invention consists in the construction of the non-return-
valves applied to each-chamber of the inner tube. These consist-of-n-narrow-strip-o
of indinrabber having a longitudinal through passage, thus forming a flattened
tube, which is opened out and attached by cementing and vuleanising to the inside-
of a metal-nozzle-p. The latter is-serewed into the-socket-k-op-k-ruleanised to the
eore tube-n washer-or-ring- being used to make the joint air tight. The nozzle.
of the inflating air pamp being applied to the nozzle p, air can be forced through.
the flat-tube-o-inwards but cannot return because the pressure on the outside of the
fat tube-o forees its flat-sides together and eloses the outlet. For letting the air.
out of the chamber the valve is partly serewed-out.
Having now particularly described and ascertained the nature of my said inven-.
ion and in what manner the same is to be performed, I declare that what I
claim is:
Firstly: The formation of the core or inner tube of inflated tires for cycles and
ther road carriages with one or more webs or partitions forming two or more.
eparate air chambers each provided with a valve, substantially as and for the
purpose described and as illustrated by the drawings.
Secondly. The construction of non return valve for inflated tires for eyeles and
ther rond-earriages-substantially as described and illustrated by the drawings.
R. J. URQUHART,
57, Barton Arcade, Manchester, Patent Agent and Consulting Engineer..