Electric lamp and discharge devices: systems – Special application – Vehicle
Reexamination Certificate
2002-10-31
2004-05-04
Wong, Don (Department: 2821)
Electric lamp and discharge devices: systems
Special application
Vehicle
C315S303000, C315S076000, C362S500000
Reexamination Certificate
active
06731072
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a light generator, more particularly to a light generator for a rotatable object.
2. Description of the Related Art
Referring to
FIG. 1
, a conventional hubcap is shown to include a cap body
10
formed with a plurality of vent holes
101
, an impeller
11
formed with a plurality of blades
111
, a permanent magnet
12
, a coil device
13
and a lamp set
14
connected electrically to the coil device
13
. When the cap body
10
rotates with a vehicle wheel (not shown), air passes through the vent holes
101
and pushes the blades
111
of the impeller
11
so as to drive the impeller
11
and the magnet
12
to rotate relative to the coil device
13
, thereby inducing electrical currents in the coil device
13
that are provided to the lamp set
14
so as to enable the lamp set
14
to generate a light output. However, since the impeller
11
is driven by the air that passes through the vent holes
101
, when the cap body
10
rotates slowly or when the vent holes
101
are blocked, the air flow will be insufficient to rotate the impeller
11
, thereby resulting in a poor light generating effect.
SUMMARY OF THE INVENTION
Therefore, the object of the present invention is to provide a light generator for a rotatable object that can overcome the aforesaid drawback associated with the prior art.
According to the present invention, a light generator comprises:
a generator housing adapted to be secured to a rotatable object for co-rotation therewith, the generator housing having a front housing part, a rear housing part, and an axle hole that extends from the front housing part through the rear housing part;
an axle mounted rotatably in the axle hole and having a coupling end that extends out of the axle hole at the rear housing part;
a magnet disposed in the generator housing and mounted co-rotatably on the axle;
a coil device mounted in the generator housing and including a spool that surrounds the magnet, a coil wound around the spool, and a pair of conductive caps capped on an assembly of the spool and the coil, each of the conductive caps being connected electrically to a respective end of the coil;
a lamp unit mounted on the generator housing and connected electrically to the conductive caps of the coil device; and
a resistance unit mounted on the coupling end of the axle to resist axial rotation of the axle.
Rotation of the generator housing with the rotatable object results in rotation of the coil device relative to the magnet, thereby inducing electrical currents in the coil device that are provided to the lamp unit so as to enable the lamp unit to generate a light output.
REFERENCES:
patent: 5497302 (1996-03-01), O'Donnell
patent: 6322237 (2001-11-01), Lee
patent: 6398395 (2002-06-01), Hyun
Dinh Trinh Vo
Ostrolenk Faber Gerb & Soffen, LLP
Wong Don
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