An Improved Method of Fixing Pneumatic Tyres to Wheels of Velocipedes and other Vehicles.
Year: 1892

page_text: France),
Date of Application (in United Kingdom), 22nd Oct., 1892
Complete Specification Left, 22nd July, 1893-Accepted, 26th Aug., 1893
PROVISIONAL SPECIFICATION.
An Improved Method of Fixing Pneumatic Tyres to Wheels of
Velocipedes and other Vehicles.
I, LEON LAZERGES, of 49, Boulevard du Point du Jour, Issy (Seine), in the
Republic of France, Manufacturer, do hereby declare the nature of this invention
to be as follows:-
My invention relates to an improved method of fixing pneumatic tyres to wheels
of velocipedes and other vehicles. It has the advantage of enabling the mounting
and dismounting to be easily effected.
To render my said invention properly understood I have represented it by way
of example in the accompanying drawing.
In this drawing,
Figure 1 represents a wheel provided with a tyre the dotted lines indicating the
position in which the tyre is put for causing it to engage with the rim.
Figure 2 represents a section of the tyre fixed upon the rim, the dotted lines
indicating the position of one of the edges of the tyres before the inflation of the
air chamber.
Figure 3 shows a section of the tyre.
Figure 4 represents a section of different profiles of rims which are more
particularly adapted for the mounting of my tyre.
Figure 5 is a modification of the method of fixing the tyre represented in
Figure 2. This arrangement comprises two concentric rims, one being fixed and
the other movable.
Figure 6 is a modification of the arrangement represented in Figure 5.
Figure 7 represents the interior surface of the concentric rim; it shows also
apertures designed for the passage of the spokes.
As shown in Figure 2 of the drawing I may employ in my method of fixing the
tyre a concave rim a presenting in section the form of a crescent with its edges
turned round.
To this rim is applied the tyre c of indiarubber or other flexible material having
thickened edges d which take below the rim being held in the cavity of the latter.
For fixing this tyre one of its edges is first presented on the slant, as indicated
by dotted lines in Figure 1 of the drawing, then the air chamber e is put in its
place, and lastly the second thickened edge is caused to engage with the concavity.
of the rim.
When the tyre has been put in this place its thickened edges are not quite in
their normal position; but as soon as the air chamber is inflated and expands it
causes the thickened edges to occupy the position shown in full lines in Figure 2.
As the thickened edges of my tyre are of a greater diameter than that of the
edges of the rim this tyre will hold itself in its place.
I prefer to make the above-mentioned thickened edges hollow that is to say
tubular for the purpose of receiving interiorly, a rod of steel or other suitable
material capable of exerting a certain retaining action when the tyre is in its place.
Such a rod may be made of one or more parts.

page_text: My rim may vary in form as shown in Figure 4 of the drawing, or I may employ
a U-shaped rim, as represented in Figure 5 or a flat rim, as shown in Figure 6, in
combination with a double concentric and movable rim g imprisoning the thickened
edges of the tyre.
༡
In the case of this latter method of fixing, the concentric double rim is held of
itself in place by its edges presenting the form of hooks h which embrace the
thickened edges of the tyre.
The movable rims or concentric rings are pierced with slots i as shown in
Figure 7 for allowing the passage of the spokes of the wheel.
Having set forth the mode of mounting my tyre I may say in conclusion that
the operations are carried out in the reverse order for dismounting the same, that
is to say the air is first let from the chamber and then the thickened edges of the
tyre disengaged from the rim.
Dated this 22nd day of October 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Method of Fixing Pneumatic Tyres to Wheels of
Velocipedes and other Vehicles.
I, LEON LAZERGES, of 49 Boulevard du Point du Jour, Issy (Seine), in the
Republic of France, 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 :-
My invention relates to an improved method of fixing pneumatic tyres to wheels
of velocipedes and other vehicles. It has the advantage of enabling the mounting
and dismounting to be easily effected.
To enable my said invention to be more clearly understood I have represented
it by way of example in the drawing left with my Provisional Specification in
which
Figure 1 represents a wheel provided with a tyre the dotted lines indicating the
position in which the tyre is placed for causing it to engage with the rim.
Figure 2 represents a section of the tyre fixed upon the rim, the dotted lines
indicating the position of one of the edges of the tyre before the inflation of the air
chamber.
Figure 3 shows a section of the tyre.
Figure 4 represents sections of different profiles of rims which are
particularly adapted for the mounting of my tyre.
more
Figure 5 is a modification in the method of fixing the tyre represented in
Figure 2, this arrangement comprising two concentric rims, one being fixed and
the other movable.
Figure 6 is a modification of the arrangement represented in Figure 5.
Figure 7 represents the interior surface of the concentric rim; showing also the
apertures designed for the passage of the spokes.
My invention is further illustrated in the drawing filed herewith in which
Figure 8 shows a modified form of solid rim upon which my tyre is fitted and
Figure 9 shows a modified form of hollow rim for receiving my tyre.
As shown in Figure 2 of the drawing I may employ in my method of fixing the
tyre a concave rim a presenting in section the form of a crescent with its edges b
turned round.
To this rim is applied the tyre c of indiarubber or other flexible material having
thickened edges d which engage below the rim being held in the cavity of the
latter.
For fixing this tyre one of its edges is first presented on the slant, as indicated

page_text: by dotted lines in Figure 1 of the drawing, then the air chamber e is put in its
place and lastly the second thickened edge is caused to engage with the concavity
of the rim.
When the tyre has thus been put in its place its thickened edges are not quite in
their normal position; but as soon as the air chamber is inflated and expands it
causes the said thickened edges to occupy the position shown in full lines in
Figure 2.
As the thickened edges of my tyre are of a greater diameter than that of the
edges of the rim this tyre will hold itself in its place.
I prefer to make the above-mentioned thickened edges hollow that is to say
tubular for the purpose of receiving interiorly, a rod of steel or other suitable
material capable of exerting a certain retaining action when the tyre is in its place.
Such a rod may if desired be made of one or more parts.
My rim may vary in form as shown in Figure 4 of the drawing, or I may employ
a U shaped rim, as represented in Figure 5, or a flat rim, as shown in Figure 6, in
combination with a double concentric and movable ring y enclosing the thickened
edges of the tyre.
In the case of this latter method of fixing, the concentric double rim is held of
itself in place by its edges presenting the form of hooks which embrace the
thickened edges of the tyre.
The movable rims or concentric rings are pierced with slots as shown in
Figure 7 for allowing the passage of the spokes of the wheel.
In Figure 8 I have shown a solid rim and in Figure 9 a hollow rim upon which
my tyre is adapted to be fitted as above described.
The convex part A is designed to diminish the cavity of the rim and ensure a
good position to the spokes.
Having set forth the mode of mounting my tyre I may say in conclusion that
the operations are carried out in the reverse order for dismounting the same, that
is to say, the air is first let out from the chamber and the thickened edges of the
tyre then disengaged 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 :-
First. The method of fixing tyres of indiarubber or other flexible material, to
the wheels of velocipedes and other vehicles, consisting in providing the tyre with
thickened edges which engage below the edges of a concave rim, the said thickened
edges being preferably made tubular for receiving a steel rod made of a single
piece or of several pieces as desired, substantially as described and represented in
the drawings.
Second. The modifications in the method of fixing the tyre, represented in
Figures 5 and 6 of the drawing which consists in the employment of a counter rim
embracing the thickened edges of the tyre so that the said edges will be enclosed
between the rim and the said counter rim.
Dated this 2nd day of Jul. 1902
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.