An Improved Rim and Tyre for Velocipede and other Road Vehicle Wheels.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
An Improved Rim and Tyre for Velocipede and other Road Vehicle
Wheels.
I, LEWIS CARMICHAEL, of Roineach Mid, Downfield, Dundee, Coal Merchant,
do hereby declare the nature of this invention to be as follows:-
--
This invention for an improved rim and tyre for velocipede and other road vehicle
wheels has for its object an arrangement of parts whereby the buoyancy and resi-
lience of a pneumatic tyre is obtained without the use of air under pressure.
According to this invention, a metal or other framework is arranged to extend
all round the wheel within the rim. This framework is connected to the rim by
springs preferably arranged in two series. The framework is then bulged out-
wardly as seen in section between the two series of springs so as to give a bear-
ing surface for the tread or cover of the tyre which is placed over it. The tread
or cover is secured in the edges of the rim, and is bulged outwardly by the frame-
work and rests upon it.
It will thus be seen that the framework will form a support for the tyre and
give form thereto while the requisite buoyancy and resilience is obtained by the
use of the springs.
The springs may be of any suitable kind, either spiral or flat or if desired
rubber springs may be used.
The from
An Improved Rim and Tyre for Velocipede and other Road Vehicle
Wheels.
I, LEWIS CARMICHAEL, of Roineach Mhor, Downfield, Dundee, Coal 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 follow-
ing statement:-
This invention for an improved rim and tyre for velocipede and other road vehicle
wheels has for its object an arrangement of parts whereby the buoyancy and resi
lience of a pneumatic tyre is obtained without the use of air under pressure.
According to this invention, a metal or other framework is arranged to extend
all around the wheel within the rim. This framework is connected to the rim by
springs preferable arranged in two series. The framework is then bulged out-
wardly as seen in section between the two series of springs so as to give a bear-
ing surface for the tread or cover of the tyre which is placed over it. The tread
Price 871

page_text: is secured in the edges of the rim, and is bulged outwardly by the frame
work and rests upon it.
It will thus be seen that the framework will form a support for the tyre and
give form thereto while the requisite buoyancy and resilience is obtained by the
use of the springs.
The springs may be of any suitable kind, either spiral or flat or if desired
rubber springs may be used.
In order that this invention may be more clearly understood reference is had
to the accompanying sheet of illustrative drawings on which Fig. 1 is a cross
section of a rim and tyre constructed according to this invention and Fig. 2 is
a view of a complete rim and tyre, partly in section, to a reduced scale.
Within the rim A a metal framework B is arranged to extend all round the
wheel. This framework is formed, as shown in section in Fig. 1, with enlarged
edges bb and is bulged outwardly at 6 being further bent as shown as is found
most desirable. The cover C of the tyre is secured at c to the rim A by suitable
devices and bears upon the bulged portion of the framework B. The enlarged
edges bb of the framework B are received in casings D D attached to the rim.
springs EE are fitted in the casings D D¹ so as to press the enlarged edges bb
and therefore the framework B outwardly.
The framework B is therefore pressed outwardly against the cover C so as to
support it. The springs provide for the requisite resilience.
Two different arrangements of springs are shown on Fig. 1 although it will be
understood that all of the springs would be similar in practice. In the casing D,
spiral springs E are employed while the spring E in the casing I¹ consists of a
block of indiarubber or other suitable material. Any other spring arrangement
may of course he employed to obtain the same effect.
In practice it is however not found desirable to form the framework B so as to
extend entirely round the wheel. It is arranged in sections as shown in Fig. 2
with a slight space between each two sections. This gives a slight freedom of
movement as each of the sections becomes subject to the pressure upon the ground
and enables the tyre to adjust itself more readily. The sections are of course suffi-
ciently near to one another to form a practically continuous bearing surface
for the cover C.
The framework B is formed of wire or metal work.
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:
1
(1) An improved rim and tyre for velocipedes and other road vehicles wheels
consisting of a framework having enlarged edges and bulged outwardly between
said enlarged edges, casings fitted to the rim and within which the enlarged
edges of the framework are received, springs arranged within the said casings
so as to press the enlarged edges of the framework outwardly and a cover secured
at its edges to the rim and bearing upon the bulged out portion of the framework
substantially as described and for the purposes specified.
(2) An improved rim and tyre for velocipedes and other road vehicles consist-
ing of a rim A, framework B having enlarged edges bb and bulged outwardly
at 61, casings D D¹, springs E or E', and cover C all arranged and operating sub-
stantially as described with reference to the drawings and for the
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.