An Improved Device for Fixing Pneumatic Tyres to the Rims of Wheels for Velocipedes and other Vehicles.
Year: 1893

page_text: Date of Application, 30th Aug., 1893-Accepted, 30th Sept., 1893.
COMPLETE SPECIFICATION.
An Improved Device for Fixing Pneumatic Tyres to the Rims of
Wheels for Velocipedes and other Vehicles.
I, EMILE JOSEPH VAUZELLE, of 21 Boulevard Poissonnière, Paris, in the
Republic of France, Builder, 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:-
My invention relates to a device for fixing pneumatic tyres to the rims of
wheels for velocipedes and other vehicles, use being made of endless wires
enclosed in the thickened edges of the protecting envelope of the air chamber.
These endless wires act by tension upon the rim owing to their connection with the
air valve upon which a nut is caused to act which bears upon the tubulure of the
rim providing for the passage of the said valve. The tightening of the aforesaid
nut has the effect of carrying away the valve and the wires which are under tension
in direct ratio to the movement of the valve into the tubulure and which under this
From this
action cause a diminution in the diameter of the envelope or tyre.
results a more powerful circular pressure of the said envelope against the rim,
which has the effect of preventing the envelope from leaving its place, by fixing it
in a perfect manner upon the rim without any other apparent means than the
tubulure of the valve existing in all pneumatic tyres.
To render my improved device properly understood I will proceed to describe
the same with reference to the accompanying drawing.
Figure 1 of this drawing represents a longitudinal section of a portion of a
pneumatic tyre, the air chamber and its protecting envelope being mounted upon
the rim.
Figure 2 is a transverse section showing the parts constituting the improved
device.
Figure 3 represents a modification of the mode of connecting the tension wires
with the air valve.
Figure 4 represents a modification of the mode of connecting these wires with
the protecting envelope.
In all these figures corresponding parts are designated by similar letters of
reference.
In these figures K is the air chamber, L its protecting envelope, H the metallic
rim upon which the said envelope is to be fixed, and A the air valve let into the
air chamber upon which it is held in any suitable manner. Upon the nut B of
the valve are placed discs C and D provided each with an eye designed to receive
the tension wires O O enclosed in the thickened edges L' L' of the envelope L. The
whole is sunk into a tubulure E brazed upon the metallic rim H and the edge of
which serves as a support for a thumb nut F having for its object to pull the
valve A or push it away and consequently put the wires 00 in or out of tension.
Above the nut Fa stopper G is screwed upon the valve, this stopper serving at the
same time as a counter nut.
The tension wires OO pass from the thickened edges LL¹ of the envelope
through the loops a a of the metallic wires b b which are also inserted into the said
thickened edges and are entirely independent of the tension wires. These loops
protect the thickened edges while they offer almost no resistance whatever to the
traction, considering the small surface of the tension wires in contact with the loops.
Moreover, the wires bb being very flexible adapt themselves with great facility
to the form of an arc of a circle necessitated by the contact of the thickened edges
with the rim. In lieu of the wires bb with rings or loops a a I may sink into the
thickened edges short pieces of tubes c (Figure 3) pierced with holes c¹¹ for the

page_text: passage of the tension wires 0 0, but this is less practical than the means above
described.
I
Instead of passing the tension wires 00 through the eyes in the discs C and D
may simply engage them with notches d¹ formed at the end of a tube d (Figure 4)
substituted for the said discs and held by a nut e. The substitution of this tube
for the eyes facilitates the connection of the tension wires to the valve, inasmuch
as it is sufficient to cause them to enter the notches without requiring them to
be cut.
'
".
It will be understood that in all cases I may vary the forms, materials and
dimensions of the parts constituting my improved device.
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: :―
First. For fixing pneumatic tyres to the rims of wheels for velocipedes and other
vehicles the combination of tension wires O O enclosed in the thickened edges of
the protecting envelope of the air chamber, with the air valve A of the said air
chamber, the back movement of which, effected by a nut or other means, produces
the tension of the wires O O and ensures the fixing of the tyre upon the rim,
substantially as specified with reference to the drawing.
Second. For fixing pneumatic tyres to the rims of wheels for velocipedes and
other vehicles a device in which the tension wires O O enclosed in the thickened
edges of the envelope are caused to pass through the loops of a metallic wire like-
wise enclosed in the said thickened edges, and to engage them either with notches
in a tube slid upon the air valve A or with eyes in discs C and D also slid upon
the said valve, substantially as specified with reference to the drawing.
Dated this 30th day of August 1893.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.