Illumination – Revolving
Patent
1987-11-10
1989-08-22
Lazarus, Ira S.
Illumination
Revolving
362192, 310 67A, 310171, 310257, 290 1R, B62J 600, F21V 3300
Patent
active
048601764
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a lighting device for a vehicle moving without an engine and on wheels, such as bicycle and tricycle, comprising at least one lamp supplied from a generator, particularly, a dynamo, the generator comprising a stator and a rotor drivable by a vehicle wheel.
Presently, the known lighting devices used for such a vehicle type comprise a generator provided with a rather limited magnetic pole number. These generators are not suitable for this vehicle type which generally moves at a relatively low speed and consequently the voltage obtained from these generators is too low.
The present invention has essentially for object to provide a lighting device which allows obviating this drawback.
For this purpose, the generator comprises at least sixteen magnetic poles distributed over 360.degree. in a heteropolar way facing an induction winding formed by a single coil also extending over 360.degree., said poles and coil being movably mounted relative to one another, the stator being so fastened to the vehicle frame that the generator be co-axial with the axis of that wheel driving the rotor.
Advantageously, the generator is ring-shaped and thus devoid of rotation shaft, the generator being mounted sidewise relative to the wheel, between the legs from a fork wherebetween said wheel revolves.
In a particular embodiment of the invention, the coil is arranged inside a perforated metal casing.
In a more specific embodiment of the invention, the generator is arranged inside a ring-shaped casing, comprising two parts movable relative to one another, the one part bounding a sidewise-open recess, the other part being comprised of a cover for this recess, said poles being fastened on an inner wall of said casing, the coil being fastened to another wall of said casing.
In a preferred embodiment of the invention, the center of the coil, lies on the wheel axis.
Other features and advantages of the invention will stand out from the following description; this description is only given by way of example and does not limit the scope of the desired protection; the references being used refer to the accompanying figures.
FIG. 1 is a diagrammatic showing of a profile view from part of a bicycle which is provided with a light device according to the invention.
FIG. 2 is a diagrammatic showing of a section view, on a larger scale, along line II--II in FIG. I, from a substantial part of the embodiment as shown in FIG. 1.
FIG. 3 shows a side view with parts broken-away, from this same substantial part from the embodiment as shown in FIG. 1, with some parts of the bicycle this one is mounted on.
FIG. 4 shows a perspective view of the perforated metal casing.
FIG. 5 is a diagrammatic drawing of the electric diagram from a lighting device according to a first embodiment of the invention.
FIG. 6 is another diagrammatic showing of the electric diagram according to another embodiment of the invention.
In these various figures, the same reference numerals pertain to the same elements.
Generally, the invention relates to a lighting device for vehicles which move, without engine, on wheels, one or several lights of which are supplied from a generator which is drivable by a wheel from this vehicle. It is here a matter of bicycles, tricycles, etc.
This lighting device is characterized by the fact that at least eight magnetic pole pairs, on the one hand, and a single coil forming the induction winding, on the other hand, extend over a complete 360.degree.-circumference, poles and coil being arranged in a mutually-movable way.
In a more particular embodiment of the invention, the coil is received inside a perforated metal casing, to obtain a generator with claws.
In FIG. 1, one may see the generator 1 which is co-axial with the bicycle back wheel 20, about the fixed axis 21 thereof and between the legs from fork 22. The generator is electrically connected to the back light 3 and front light 4, and possibly to other fittings, such as winkers 14 and hooter 17, through the bicycle frame 23.
The poles 27 have a rectangular cros
REFERENCES:
patent: 1338568 (1920-04-01), Foote
patent: 2488021 (1949-11-01), May
patent: 3459982 (1969-08-01), Cartier
patent: 4074157 (1978-02-01), Face
patent: 4075603 (1978-02-01), Snyder
patent: 4191988 (1980-03-01), Keimakwa
Bauwens Frank
De Bom Van Driessche Dirk
Lazarus Ira S.
Neils Peggy
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