Improvements in or relating to Metallic Rims and Elastic Tyres for Vehicle Wheels, and in Apparatus for Putting such Tyres on the Wheels.
Year: 1899

page_text: Date of Application, 19th Jan., 1899
Complete Specification Left, 19th Oct., 1899-Accepted, 19th Jan., 1900
PROVISIONAL SPECIFICATION.
Improvements in or relating to Metallic Rims and Elastic Tyres for
Vehicle Wheels, and in Apparatus for Putting such Tyres on the
Wheels.
We, HENRY GRENDON TIPPET, of 292, Vauxhall Road, Liverpool, in the
County of Lancaster, Merchant, and JOHN SMITH, of 19, Newland Street,
Liverpool aforesaid, Commercial Traveller, do hereby declare the nature of this
invention to be as follows:-
This invention relates to metallic rims and elastic tyres for vehicle wheels and
in apparatus for putting such tyres on the wheels.
In the rims as hitherto constructed the channel therein has been made deep,
and the shape thereof made somewhat dovetailed so as to clutch the tyre and hold
it in position therein. By this invention, however, we propose to make the rim
shallower and thereby effect a saving of a considerable amount of rubber, while
producing an efficient and secure means of fastening the tyre on in place.
In carrying the invention into effect, we provide the rim with a channel having
straight or evenly outwardly sloping sides and considerably shallower than what
has been the custom hitherto. In this channel we place the rubber tyre which is
cut of such a length that it is an inch or two longer than is absolutely necessary
to go round the rim. The tyre is secured to the rim by a flat metallic binding
strip which passes through a hollow channel or core in the rubber tyre, passing
all through it from end to end, and the adjacent ends coupled together by a button
or claw or otherwise. So long therefore as the two opposite and adjacent ends of
the metallic binding strip remain coupled together, the rubber will be firmly
held in the rim by the pressure of the binding strip. At one point in the rim we
provide however a projecting pin or stud and in that part of the tyre which beds
itself in the rim and in the metallic binding strip we provide a corresponding
hole. The stud engages in the hole, and thus prevents the tyre revolving bodily,
independently of the wheel.
In placing a tyre in the rim, we pass the strip through the hollow core in the
tyre, which runs from end to end thereof, and then press back the ends of the
rubber tyre so as to expose the two ends of this binding strip. The tyre with its
metallic strip is then passed round the rim, care being taken that the pin shall
engage in the hole aforesaid and the two ends of the strip are then forcibly
drawn together by a screw device until the button or claw at one end, engages in
a hole in the other. The tyre is by this means firmly held in the shallow channel
in the rim and cannot possibly come off. In order to draw forward the opposite
ends of the tyre, so that they shall meet and cover over the ends of the metallic
strip where they are coupled together, we employ a device consisting of a frame
that
be swung round the wheel
bolt passed through the
wheel hub on which it can be held stationary and the wheel turned
round on the bolt. This frame is fitted with a screw clamp which
is capable of biting or binding on the tyre at any point in
can
on
a
its

page_text: circumference, so that by forcibly pulling the wheel the leverage exerted will
attenuate the rubber slightly at each pull; by slackening the screw, the frame is
unclamped from the tyre and the wheel rotated so that the frame will bite the
tyre in another position, the screw clamp tightened up again, and the rubber
again attenuated by pulling, and so on in like manner all round the wheel until
sufficient attenuation of the rubber is secured to make the two opposite ends
meet. The rubber being in compression before attenuation there is no danger
of its springing back after being attenuated, and there also is no necessity for
being the two opposite ends when brought into contact being cemented or other-
wise fastened together, the binding strip holding the tyre in position in the rim.
It is obvious that instead of a screw clamp other suitable device may be used
for biting or binding the tyre, thus for example a cam device might be used,
which being free to turn on its pivot will bite the rubber and hold it firmly
when the wheel is pulled to distend the rubber. By turning the cam into its
off position, the rubber is released to enable the wheel to be shifted.
101
1000
Improvements in or relating to Metallic Rims and Elastic Tyres for
Vehicle Wheels, and in Apparatus for Putting such Tyres on the
Wheels.
We, HENRY GRENDON TIPPET, of 292, Vauxhall Road, Liverpool, in the
County of Lancaster, Merchant, and JOHN SMITH, of 19, Newland Street,
Liverpool aforesaid, 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 metallic rims and elastic tyres for vehicle wheels and
in apparatus for putting such tyres on the wheels.
In the rims as hitherto constructed the channel therein has been made deep,
and the shape thereof made somewhat dovetailed so as to clutch the tyre and hold
it in position therein. By this invention, however, we propose to make the rim
shallower, and even wider at the shoulder, and yet effect a saving of rubber while
producing an efficient and secure means of fastening the tyre on in its place, at
the same time preventing the rubber of the tyre being cut by coming in contact
with the edge of the rim.
The invention will be understood from the following description, reference
being had to the accompanying drawings in which:-
Figure 1 is a sectional view of the tyre and wheel rim with its binding strip;
Figure 2 a cross section showing the locking pin;
Figure 3 a detail view showing the fastenings at the ends of the binding strip;
Figure 4 a plan and longitudinal section showing the method of fastening the
ends of the binding strip:
Figure 5 the apparatus for forcibly drawing together the two ends of the
binding strip:
Figure 6 a front view of the attenuating apparatus showing the method of
drawing forward the opposite ends of the tyre so that they shall meet and cover
over the fastened ends of the metallic strip;

page_text: Figure 7 an end view thereof.
We provide the rim A with a channel having straight, or even outwardly.
sloping sides and considerably shallower than what has been customary hitherto:
In this channel A we place the rubber tyre B, which is cut of such a length that
it is a foot or so longer than is absolutely necessary to go round the rim A. The
tyre is secured to the rim by a flat metallic binding strip C, which passes through
a hollow channel or core D in the rubber tyre B passing all through it from end to
end, and the adjacent edges coupled together by a button or claw E or otherwise,
So long therefore as the two opposite and adjacent edges of the metallic binding
strip remain coupled together, the rubber B will be firmly held in the rim A.
by the pressure of the binding strip. At one point in the rim we provide however
a projecting pin or stud F screwed thereinto and in that part of the tyre B which
beds itself in the rim A, and in the metallic binding strip C we provide a
corresponding hole. The stud F engages in the hole and thus prevents the tyre
revolving bodily independently of the wheel. The hole in the strip C has a
narrow slot on each side so arranged that by sliding the strip one way or the
other, the shank of the stud will engage in one of the slots, and thus prevent the
tyre being disengaged from the rim of the wheel.
In placing the tyre in the rim we pass the strip C through the hollow core D
in the tyre which runs from end to end thereof, and then press back the ends of
and compress the rubber tyre, so that its length when so compressed shall be
shorter than the circumference of the rim, and thus expose the two ends of this
binding strip C, as shown in Figure 5. The tyre in its compressed condition,
with its metallic strip, having been passed round the rim A of the wheel, (care
being taken that the pin engages in the hole aforesaid), the two ends of the
strip C are then forcibly drawn together by a screw device until the buttons or
claws at one end engage in the holes H at the other. The tyre is by this
means firmly held in the shallow channel in the rim and cannot possibly come off.
A convenient form of screw device consists of the bars I which engage by
means of the claws (or a clip may be used) the two ends of the strip, and are
pivoted together scissorwise at J. By engaging the claws or attaching the clips
in or to the ends of the strip, and turning the handle K, the opposite ends of the
bars are drawn together by means of the right and left handed screws L, and so
pull the two ends of the strip together and enable them to be coupled. In
order to draw forward the opposite ends of the tyre B so that they shall meet
and cover over the ends of the metallic strip C where they are coupled together,
we employ a device consisting of a frame that can be swung round the wheel on a
bolt passed through the wheel hub, or which can be held stationary and the
wheel turned round on the bolt. The latter plan is illustrated in the drawing.
O is the wheel, Pits hub, Qa shaft supported in the brackets R. M is the frame
fitted with a screw clamp N which is capable of biting or binding on the tyre B
at any point in its circumference, so that by forcibly pulling the wheel 0, the
leverage exerted will attenuate the rubber tyre B slightly at each pull. By
slackening the screw the clamp is unclamped from the tyre, and the wheel
rotated so that the roller of the screw clamp will bite the tyre in another position,
the screw clamp tightened up again, and the rubber again attenuated by pulling
the wheel, and so on in like manner all round the wheel until sufficient attenua-
tion of the rubber is secured to make the two ends meet. The rubber being in
compression before attenuation there is no danger of its springing back after
being attenuated, and there also is no necessity for the two opposite ends when
brought into contact being cemented or otherwise fastened together, the binding
strip holding the tyre in position in the rim. It is obvious that instead of the
screw clamp, other suitable device may be used for biting or binding the tyre.
Thus for example, a cam device might be used, which being free to turn on its
pivot will bite the rubber and hold it firmly when the wheel is pulled to distend
the rubber. By turning the cam into its off position, the rubber is released to
enable the wheel to be shifted.

page_text: 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:
1. In tyres which are held on their rims by means of metallic binding strips or
wires, the application of a screw device substantially as described, for forcibly
drawing the opposite ends of the strip together to fasten them.
2. In tyres which are held on their rims by means of metallic binding strips or
wires, the apparatus for drawing forward the opposite ends of the tyre on the
wheel, to make them meet and cover over the ends of the metallic strips where
they are coupled together, which consists of an adjustable screw or other clamp
adapted to bit or bind on the tyre with sufficient force at any point in its
circumference, so that by forcibly pulling the wheel while the clamp is held
stationary, the leverage exerted will attenuate the rubber slightly at each pull
and thus bring the two ends step by step nearer together, substantially as
described, or any mere mechanical equivalent thereof such as holding the wheel
stationary and pulling the clamp.
3. In tyres that are held on their rims by means of metallic binding strips or
wires, the combination with the wheel rim of a projecting pin or stud, said pin
or stud being so arranged as to engage in a hole in the tyre and binding strip,
whereby the tyre is prevented from revolving bodily independently of the rim,
substantially as described.
4. The general combined arrangement and construction of parts forming our
improved apparatus for drawing forward the opposite ends of rubber tyres on
wheels to make them meet, and cover over the ends of the metallic strips, sub-
stantially as described.