Improvements in and relating to Wheels and Pneumatic Tyres for Velocipedes and other Light Vehicles.
Year: 1891

page_text: Date of Application, 16th Nov., 1891
Complete Specification Left, 16th Aug., 1892-Accepted, 5th Nov., 1892
PROVISIONAL SPECIFICATION.
Improvements in and relating to Wheels and Pneumatic Tyres for
Velocipedes and other Light Vehicles.
I LÉONCE BOUSQUET, of Rennes, in the Republic of France, Gentleman, do
hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in wheels and pneumatic tyres for
velocipedes and other light vehicles.
During the past two years many attempts have been made to provide an efficient
pneumatic tyre but hitherto without success as all such tyres possess great defects.
Some are cemented, or held in position by means of screws and are very difficult to
remove which is an operation taking considerable time, while others owing to their
construction or manufacture lose the greater part of their elasticity.
The object of this invention is to remedy these defects and to provide an improved
pneumatic tyre which while possessing the maximum possible amount of elasticity
and the requisite solidity can be quickly attached to or removed from the wheel
without it being necessary to operate screws or employ cement, whereby repairs
can be effected or the tyre can be changed in a few minutes.
In carrying out the invention the rim of the wheel is constructed essentially of
two parts connected together, the outer part having its edges bent downwards and
inwards to form at each end a sort of hook and enclosing the other part. The
object of this construction is (1) to allow as much as possible of the air chamber to
be outside the rim and (2) to allow of the rim serving to receive the edges of
the tyre.
The tyre is formed of a band of india-rubber of a U shape in cross section having
at each side at the ends a swelling or protuberance forming a shoulder adapted to
be inserted in the hooked part of the rim. To render the tyre inextensible it is
provided in its interior with fabric cemented at each side and folded several times
into the shoulder in order to render the latter extremely resisting and difficult to
put out of shape. The fabric is not cemented in that part of the tyre which comes
in contact with the ground whereby the greatest possible elasticity is ensured at the
same time dispensing with the independent lining of fabric intended to maintain the
dilatation of the air chamber which in that case is evidently extensible.
The air chamber is moulded similarly to the tyre and is provided with a supply
tube for the filling valve.
From this construction it will be seen that the tyre can be placed in position with
facility it can be instantaneously removed if the air chamber collapses as it is solely
the extension of this air chamber which keeps the tyre in place.
Dated the 16th day of November 1891.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in and relating to Wheels and Pneumatic Tyres for
Velocipedes and other Light Vehicles.
I, LÉONCE BOUSQUET, of Rennes, in the Republic of France, Gentleman,
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 improvements in wheels and pneumatic tyres for

page_text: During the past two years many attempts have been made to provide an efficient
pneumatic tyre but hitherto without success as all such tyres possess great defects,
some being cemented, or held in position by means of screws are very difficult to
remove and the removal takes considerable time, while others owing to their
construction or manufacture lose the greater part of their elasticity.
The object of this invention is to remedy these defects and to provide an
improved pneumatic tyre which while possessing the maximum possible amount of
elasticity and the requisite solidity can be quickly attached to or removed from the
wheel without it being necessary to operate screws or employ cement, whereby
repairs can be effected or the tyre can be changed in a few minutes.
In the accompanying drawing,
Figure 1 is a sectional elevation of part of a wheel and pneumatic tyre for
velocipedes and other like vehicles constructed according to my invention.
Figure 2 is a transverse section of the same taken through the axis of the inlet
tube for the compressed air.
Figure 3 is a transverse section of the india-rubber tyre.
Figure 4 is a transverse section of the air chamber.
Figure 5 is a transverse section of the metal rim, and
Figure 6 is a similar view of a modified construction of rim.
In carrying out the invention the rim of the wheel is constructed essentially of
two parts a, a' connected together by welding or otherwise the outer part a having
its edges bent so as to form at each end a sort of selvedge or hook and enclosing
the other part a', the object of which is (1) to allow as much as possible of the air
chamber to be outside the part a of the rim and (2) to allow the rim to receive the
ends d of the tyre e as shewn in Figures 1 and 2.
The interior of the part a of the rim is strengthened by means of a metal ring o
in order to allow the spokes of the wheel to be firmly fixed therein.
C
The tyre e is formed of a band of india-rubber or other suitable elastic material
of a U-shape in cross section having at each side at the ends d, d a swelling or
protuberance d' forming a shoulder adapted to be inserted in the hooked part 6 of
the rim. To render the tyre inextensible it is provided in its interior with fabric f
cemented at each side and folded several times into the thickness of the shoulder d¹
in order to render the latter extremely resisting and difficult to put out of shape
under the action of the pressure exerted by the compressed air. In fact the tyre e
only holds by tension or in other words the two shoulders d', d' at its edges being
placed on the selvedge of the rim support the whole of the interior pressure.
fabric is not cemented in that part of the tyre which comes in contact with the
ground as shewn in Figure 3, whereby the greatest possible elasticity of the tyre e
is ensured at the same time dispensing with the independent lining of fabric employed
with some pneumatic tyres and which limits the expansion of the air chamber.
The
The air chamber g is moulded similarly to the tyre and is provided with a tube h
for the filling valve k as shewn in Figures 2 and 4. To this tube the pipe of the
air compressing pump is connected in the usual manner.
From this construction it will be seen that the tyre can be placed in position
with facility and becomes instantaneously disengaged from the rim if the air chamber
collapses as it is solely the expansion of the air chamber which keeps the said tyre
in place by maintaining the shoulders d', d', in engagement with the hooked
parts b, b, of the rim.
rim
Figures 5 and 6 illustrate two different forms which may be given to the
a,
a'.
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 :-
1. A wheel for velocipedes and other vehicles having a rim constructed of a
covering part a the edges of which are folded inwards so as to form selvedges or
hooks b, b to receive the edges of the rubber tyre, and of an interior part a² on

page_text: which bears the air chamber and against the lateral faces of which abut the .edges
of the said india-rubber tyre, substantially as set forth.
2. A tyre e of india-rubber or other suitable flexible material for the wheels of
velocipedes and other vehicles made of U-shape in cross section the edges of which
are provided with swellings or protuberances forming shoulders engaging in the
hooks of the metal rim a, a, substantially as set forth.
3. A tyre e of india-rubber or other suitable flexible material for the wheels of
velocipedes or other vehicles made of U-shape in cross section and lined on its
inner side with fabric which is not cemented at the part of the tyre which comes in
contact with the ground, the said tyre having its edges made with swellings or
protuberances which form shoulders engaging in the hooks b of the rim a, a',
substantially as set forth.
4. A wheel and pneumatic tyre for velocipedes and other vehicles comprising the
rim in two parts a, a' the outer part a being provided with selvedges or hooks b, b
and the inner part a forming an abutment for the elastic tyre; the tyre e of india-
rubber or other suitable flexible material of U-shape in cross section and having
its edges provided with swellings or protuberances located in the hooks of the rim,
the said tyre being lined in its interior and around its protuberant edges with the
fabric f which is not cemented to the said tyre at the part where the latter comes
in contact with the ground, substantially as set forth. .
Dated this 16th day of August 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.