Improvements in Pneumatic Tyres for Wheels of Velocipedes and other Vehicles, and in Rims for the same.
Year: 1892

page_text: Complete opecification Le prov πουομιου,
COMPLETE SPECIFICATION.
Improvements in Pneumatic Tyres for Wheels of Velocipedes and
other Vehicles, and in Rims for the same.
We, MICHELIN AND COMPANY, of Clermont-Ferrand, in the Republic of
France, Manufacturers, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement :-
Our invention is an application of the principle which consists in forming the
tube which resists the pressure, of an open circular band fastened to the two sides
of the rim.
In the tube thus formed an air chamber provided with a valve is placed.
We make a rim the two sides of which are of a gutter like section.
We make the outer tyre with an enlargement at each side. These enlargements
are of the same width as the gutter.
'
We put the tyre on the rim, placing the enlargements at the bottom of the
gutters, and above these enlargements when placed in the gutter, we put a circular
metal band; this band fits exactly between the outer side of the gutter and the
rubber tyre; the two ends of the band just meet each other and are fastened by
screws or by other means.
When the air chamber which has naturally been placed inside the tube thus
formed is blown out, the enlargements of the tyre abut or press against the metal
bands and the tyre is maintained perfectly in position.
It is easily understood that the two ends of the band may be fastened one to the
other or fastened to the rim.
This fastening may be effected by means of a screw or by any other method.
The band with or without its ends being fastened may also be held in the gutter
by any method as for example: either by means of a screw or pins, or by forcing
it into a groove.
In the latter case a circular projection may be placed in the rim,
which takes into a corresponding groove in the band or which retains the end of
the band.
The band may be made in one or several pieces.
For greater lightness it may be made channelled or hollow, or a simple tube may
be used.
Our invention may be easily used with a hollow rim as shown for example in
Figure 2 of the annexed drawings.
Å rim of the section shown in Figure 3 may also be used, but we prefer the
section shown in Figure 1 which has fewer cutting edges.
It will be readily understood that the tyre is very easily taken to pieces.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. The combination of a rim having a trough or gutter round it at each side, an

page_text: inner tube containing air or gas under pressure, an outer tyre consisting of a strip
having enlargements at each side fitting into the troughs or gutters and bands each
fitting into one of the troughs or gutters with one side against the outer side of the
trough, the opposite side against the outer tyre and the bottom against the enlarge-
ment substantially as described.
2. Pneumatic tyres and rims substantially as described and shown in the
drawings.
Dated thig 5th day of Anvil 1900
MICHELIN & Co.