Improvements in Means of Securing Pneumatic Tires in the Rims of Wheels.
Year: 1892

page_text: Date of Application, 12th Mar., 1892
Complete Specification Left. 12th Dec., 1892-Accepted, 11th Feb., 1893
PROVISIONAL SPECIFICATION.
Improvements in Means of Securing Pneumatic Tires in the Rims
of Wheels.
We GRANVILLE HAWLEY EGERTON COOKE of No. 40 Brunswick Square,
London W.C. in the County of Middlesex, Engineer and THOMAS COOKE
M.D. F.R.C.S. Surgeon of the same address, do hereby declare the nature of this
invention to be as follows:-
The object of our invention is to secure the envelope of pneumatic tires in the
rims of wheels in such a manner that the enveloping band which consists ordinarily
of canvas and vulcanized rubber may be readily removed for effecting repairs to the
enclosed inflatable tube.
For this purpose we make the enveloping band with a sheath at each of its two
sides suitable for receiving a wire by which the enveloping band is to be retained in
the rim of the wheel.
Hitherto when wires have been employed to retain the enveloping band within the
rim of the wheel they have been made in the form of rings without
any detachable
joint, the rings being put into position in the rim before inflating the tire or the
ends of the wire have been joined by various detachable fastening devices all of
which require a gap in the enveloping band for fastening or unfastening the jointing
device and are objectionable inasmuch as they form projecting parts which by
constantly renewed pressure upon the air tube cause wear and eventual rupture.
The wires we employ are sheathed in the enveloping band and are carried to a
length more than sufficient to make a circle of the size of the required ring for
holding the enveloping band in position in the rim. Thus one extremity of the
wire is made to pass beyond the other and each extremity being turned out at right
angles forms a hook of L form which may be passed through a hole made in
the rim in a position to correspond with that to which the extremity of the wire
may be readily drawn while the enclosed air tube is deflated without any special
instrument for the purpose.
Although the extremities of the wire thus hooked through the wheel rim tend to
remain in their position when the tire has been inflated for greater security we
screw a nut upon each extremity protruding through the wheel rim.
In removing the enveloping band in order to expose the contained air tube for
purposes of examination or repairs, the air tube is to be deflated; the nuts removed
from the extremities of the wires; the protruding ends pushed through the rim and
the overlapping ends of the wires pushed into the sheaths, thus instantly releasing
the enveloping band by increasing the diameter of the wire rings.
Dated this 9th day of March 1892.
AYRTON & THOMAS,
Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Means of Securing Pneumatic Tires in the Rims
of Wheels.
We GRANVILLE HAWLEY EGERTON COOKE, of No. 40 Brunswick Square,
London, W.C., in the County of Middlesex, Engineer and THOMAS COOKE,
M.D. F.R.C.S. Surgeon of the same address, 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 for improvements in means of securing pneumatic tires in the
rims of wheels has for its object to secure the tread of a pneumatic tire in the rim
of a wheel in such manner that it can readily be removed for effecting repairs to
the enclosed air tube; and consists in making the tread at each of its two sides
with a sheath suitable for receiving a wire by which it can be retained in the rim
of the wheel.
Hitherto when wires have been employed to retain the tread within the rim of
the wheel, they have been made in the form of continuous rings, or of cut rings,
the ends of the cut rings either passing through the rim and being separately
secured to the rim by a tightening device, or being joined by various detachable
fastening devices which require a gap in the tread for fastening or unfastening the
jointing device and which are objectionable inasmuch as they form projecting
parts which by constantly renewed pressure upon the air tube cause wear and
eventual rupture.
In a pneumatic tire constructed according to this invention the wires are
sheathed in the tread and are carried to a length more than sufficient to make a
circle of the size of the required ring for holding the tread in position in the rim.
The wires after leaving the sheaths of the tread extend some distance beyond the
places where they leave the sheaths, one extremity of each wire overlapping or
passing beyond the other. Each extremity is turned out at right angles to form a
hook of shape which is passed through a hole made in the rim in a position
to correspond with that to which the extremity of the wire can be readily drawn
while the enclosed air tube is deflated without any special instrument for the
-purpose.
My object in making one extremity of the wire overlap or pass beyond the other
is as follows: If it is desired to remove the tread in order to expose the contained
air tube for purposes of examination or repairs, the air tube is first deflated
and the extremities of the wires are then pushed back through the holes in the rim
so as to be free at the ends. The free ends of the wire which now extend some
.distance beyond the places where they enter the sheaths of the tread can now be
pushed back or will of themselves run back into the sheaths but will not disappear
out of sight and to the extent that they enter the sheath the circumference of the
wire will be increased and the tire can be easily removed. When the intention is
to attach the deflated tire which has been piaced on to the wheel the portions of
the wires which project outside the sheath can be readily laid hold of and the
wires drawn out of the sheath at either or both ends until it projects outside
the sheath the distance first mentioned; and if then the two ends be passed into
the holes in the rim and fastened, the tire when inflated will be held firmly in
position.
This result is obtained whether the ends of the wire come out of the sheath
at tlie same or at different points but it is desirable for the purpose of holding
the tire throughout its length that the wires should come out either at the same
point or should overlap each other in the sheath before coming out.
In making the wire of the proper length it is inserted in the sheath and one end
is bent to an shape and passed through its hole in the rim, the other end of the
wire is pulled taut, cut off to the desired length and then bent.
Γ

page_text: Although the extremities of the wire thus hooked through the wheel rim tend to
remain in their position when the tire has been inflated, for greater security a nut
is screwed upon each extremity protruding through the wheel rim.
In the accompanying sheet of illustrative drawings
Figure 1 is a part elevation of a tire showing the overlapping ends of the
retaining wire in position.
Figure 2 is a similar view before the said ends are placed in position.
The tread a is formed at each side with a sheath in which.a continuous wire bis
inserted. The ends c of each wire after leaving the sheath, extend some distance
beyond the place where they leave the sheath so as to overlap and are of shape.
One edge of the tread a is sprung into position in the rim d, the ends of the wire b
being perfectly free allowing this operation to be easily effected and the hooks c
are passed through the holes in the rim d and secured by nuts e the distance
between the holes being such that the wire ring assumes the desired diameter.
The air tube is next inserted and then the outer edge of the tire is secured in
a similar manner to the first. On inflating the air tube the whole tire is firmly
secured in position.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
In a pneumatic tire securing the tread within the rim of the wheel by means of
the overlapping ends of wires which are capable of being drawn or pushed into
the tread and which are fastened to the rim of the wheel substantially as
described.
Dated this 19th day of December 1892.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.