Improvements in or relating to Pneumatic Wheel Tyres.
Year: 1893

page_text: Date of Application, 23rd Sent., 1893
Complete Specification Left, 8th May, 1894-Accepted, 9th June, 1894
PROVISIONAL SPECIFICATION.
Improvements in or relating to Pneumatic Wheel Tyres.
I, JAMES RICHARD TRIGWELL, of 146, Brixton Hill, in the County of Surrey,
Cycle Manufacturer, do hereby declare the nature of this invention to be as
follows;-
This invention relates to the means employed for securing a pneumatic tyre upon
the rim; the invention may be carried out as follows;-
I may employ any ordinary form of rim but I prefer to employ one of a flat
crescent shape. The tyre is preferably composed of an air-tube and an outer
cover the air-tube would be of ordinary construction and provided with the
ordinary valve. The cover may be formed of india-rubber or india-rubber and
canvas or the like and is provided in each edge with a wire, cord, or similar
device extending entirely around the wheel; or instead of wires or the like the
canvas may be provided with a selvage or otherwise woven or prepared so as not to
stretch at the edges.
At each edge of each of the wire hoops or at the ends of the selvage I provide
headed studs or equivalent adapted to pass through one or more suitable openings
in the rim; convenently a single opening may be formed large enough to allow of
both studs of one head passing through at the same time, after which they may
be moved into side recesses so that they cannot pass back again, the hole in the
rim acting like a button hole. When both sets of studs have been pushed into the
side recesses a spring sliding cover or other device may be placed in position to close
up the hole and complete the rim. I find a convenient slide may be formed of a
small plate of metal with a flat spring upon it the spring engaging with grooves in
the sides of the stud heads so that the plate may be slipped into position, the
friction of the spring securely holding it, or if desired the spring may be provided
with a suitable form of catch adapted to engage the hole in the rim or the studs.
Where the non-stretchable selvage or the like is employed I prefer to divide it
in one place and to place the studs at or near the two ends; the ends of the selvage
may overlap if desired, the studs either passing each other or being placed back a
short way from the ends. If desired the metal cords or bands may overlap also
and as these bands whether metal or not are inside the rim and it is desirable that
they should lie flat upon it I prefer to employ thin flat bands.
Various means may be employed for securing the bands, for example one end of
the band might be provided with a loop through which the stud would be passed
after which it would pass through a suitable hole in the rim where it could be
fastened in any desired manner.
1
г 1
1
1000
W. P. THOMPSON & BOULT,
Of London, Nottingham, Liverpool, and Manchester,
Agents for the Applicant.

page_text: Improvements in or relating to Pneumatic Wheel Tyres.
I, JAMES RICHARD TRIGWELL of 146 Brixton Hill, in the County of Surrey,
Cycle Manufacturer, 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 the manner of securing pneumatic tyres to the rims of
the wheels and will be best understood by reference to the accompanying drawings
in which
Figure 1 shows in elevation a portion of the rim and tyre and one form of the
securing device.
Figure 2 one end of one of the wires,
Figure 3 the strengthening plate placed around the opening in the rim, and
Figure 4 the plug or distance piece which closes the opening in the rim and
secures the ends of the wires in their proper places.
A represents the rim of the wheel which may be of any ordinary construction
preferably of crescent shape in cross section. B is the cover and Ċ the air tube
both of substantially ordinary construction, the cover B having wires or equivalent D
one in each edge as will be well understood. These wires go entirely round the
wheel each end of each wire being formed with a head E such as is shown in
Figures 1 and 2. The rini A bas an opening F the exact preferred shape of which
is shown in Figure 3, and into these the heads E of the wires are inserted from the
inside to the outside, the enlarged portions E¹ of the heads projecting through the
rim towards the interior of the wheel when the tyre is fixed as shown in Figure 1.
It will be seen that the opening F is enlarged upon the centre line of the rim at F
to allow sufficient slackness to the wires when their heads are pushed into the
central opening to permit of the heads being pushed inwardly into the rim in order
to remove the wire. In fixing the tyre the heads are pushed through the
opening F at the larger portion F and each pair is then pushed sideways into the
bays or depressions F2, and when in this position the wires D are sufficiently
tightly stretched around the rim A. To prevent the heads E from coming out of
the bays F2 and also to prevent water, dirt, etc, passing to the interior of the rim
or tyre through the opening F, the plug or distance piece G shaped to the
opening F F but not to the bays F which when the plug in use are filled by
the narrow portion E² of the heads E, is inserted between the pairs of heads E
and pushed down into the opening F F completely closing it and rendering it
impossible for the heads E to come out of the bays F2 so long as the plug G
remains in place. For convenience in applying and removing the plug G any
suitable knob or handle H is secured to G conveniently a loop as shown in
Figure 4 by which it may be secured to the rim or to one of the spokes by means
of a suitable chain. The plug G may be also fitted with a cover preferably a
spring cover which in Figure 4 is carried by the stem of the handle H, this
cover I being so shaped that it may be sprung over the two pairs of beads E and
when in position the edges I will hold on under the larger portion E¹ of the head E
and thus secure the whole plug in place which can only be removed by intentionally
pulling it off. However other means may be employed for securing the plug G in
its place for example as shown in Figures 5, 6 and 7 the plug G may be in the form
of a plate of sufficient size to cover over (without fitting into) the whole of the
opening F F F but not the recess F. In this form the plug G is preferably
provided with a sleeve G¹ having a square hole extending through it so as to fit
the square portion J' of the T-headed bolt J whose threaded portion is provided
with a nut K and whose head J2 is somewhat longer than the distance between the
outer ends of F¹. The outer ends of J2 are preferably bevelled as shown and the
Ι

page_text: ends of the slot F' are also bevelled so that when the plug G is secured in position
as shown in Figure 7 the head J2 will be drawn tightly into the slot. To pass the
bolt head J through the slot F' it must be inclined in the manner shown in
Figure 6 as will be well understood. The bolt J is provided with a groove J³ to
enable a chain to be attached to it for fastening it to, say one of the spokes and
also preventing the nut from being taken off the bolt J.
Figure 1 of the drawings represents the tyre fixed in proper position upon the
rim A and inflated. If it be desired to remove the tyre or one side of the cover B
the plug G is drawn up by the handle H and the two heads E appertaining to that
side of the cover which it is desired to move are pushed inwardly towards the
central opening F and springing back into the extensions F¹ relieve the tension
upon the wire so that the heads can then be easily pushed outward through the rim
towards the tyre the wire D being thus released and the edge of the cover B in
which the wire is secured being thus freed and capable of being easily removed
from the rim. Access can thus be had to the air tube which can be removed and
repaired and the cover replaced the fastening consisting merely in pushing the
beads E back again through the hole F F and into the bay F2 until they assume
the position shown in Figure 1 after which the block G can be inserted and the
fastening is complete. If it be desired to remove the tyre entirely from the wheel
the same operation is gone through but after one pair of heads has been passed
through the opening F the second pair are passed through in a similar manner and
the whole tyre is then free from the rim.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A pneumatic tyre for cycle wheels comprising an air tube C a cover B having
a wire or equivalent D in each edge each end of each wire carrying an enlarged
head E E' the necks E of which when the tyre is fixed upon the rim entering a
recess F in an opening F in the rim and being there retained by a plug such as G
inserted in the opening F after the heads have been fixed, substantially as described
and illustrated in the accompanying drawings.
2. In a pneumatic tyre fastening device the combination with the wires D having
enlarged heads E E' of a rim opening F F' F' into which the heads E of the wires
are inserted and fixed in the recesses F2 substantially as described and illustrated
in the accompanying drawings.
3. In a pneumatic tyre fastening device the combination with the headed
wires D E and opening F F F of a plug such as G adapted to fit the opening F
and secure the heads E in the recesses F2 and the combination with the plug Gof
the handle H and spring cover 1 substantially as described and illustrated in the
accompanying drawings.
4. In a pneumatic tyre fastening device the combination with the headed
wires DE and opening F F F of a plug such as G adapted to fit over the
opening F F and secure the heads E in the recesses F2 and the combination with
the plug G of the T-headed bolt J and nut K substantially as described and
illustrated in the accompanying drawings.
5. In a pneumatic tyre fastening device carrying the headed ends of the wires D
completely through the rim to the inner or accessible part thereof and there
fastening them substantially as described.
Dated this 7th day of Nov 180.1