Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2000-10-18
2002-01-08
Ramirez, Nestor (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S06700R, C310S07500D
Reexamination Certificate
active
06337528
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a roller, more particularly to a roller having a self-contained induction generator device.
2. Description of the Related Art
The improvement of this invention is directed to a conventional roller mounted rotatably on a roller shaft of a scooter. The roller is generally provided with a light emitting unit and a dry battery for supplying electricity to the light emitting unit. Since the dry battery needs to be replaced frequently, a roller with a self-contained generator device has been proposed, so as to eliminate the need to replace the dry battery in the conventional roller.
Referring to
FIGS. 1 and 2
, a conventional roller
1
, which is adapted to be mounted rotatably on a horizontal roller shaft
16
of a scooter (not shown), is shown to include a roller housing
10
, a light emitting unit in the form of two bulbs
14
, and an induction generator device
13
.
As illustrated, the roller housing
10
includes two housing halves
11
which are interconnected removably and which define an accommodation chamber
102
therebetween. The housing halves
11
are mounted rotatably on the shaft
16
by means of two bearing units
15
. Each of the housing halves
11
has a shaft-extension hole
101
so that it is adapted to be sleeved rotatably on the shaft
16
in such a manner that the shaft
16
extends through the shaft-extension holes
101
in the housing halves
11
. The bulbs
14
are mounted within the housing
10
. One of the housing halves
11
is formed with a pair of diametrically disposed light passage holes
111
via which illumination from the bulbs
14
are visible from an exterior of the housing
10
.
The induction generator device
13
is disposed within the accommodation chamber
102
of the housing
10
, and includes a permanent magnet
135
that is sleeved securely on the shaft
16
and that has two opposite vertical side surfaces
131
, and a winding unit consisting of a sheave
130
and a coil unit
132
that is wound on the sheave
130
and that is in electrical connection with the bulbs
14
. The sheave
130
is sleeved rotatably on the magnet
131
, and is further fixed to the housing
10
. Two ring-shaped vertical electrically and magnetically conducting plates
133
are mounted fixedly in the housing
10
and are in electrical and coaxial connection with the coil unit
132
. Each of the conducting plates
133
has a plurality of elongated axially extending sheets
134
which are angularly spaced apart from each other and which extend into an annular space defined between the magnet
131
and the sheave
130
. Under this condition, when the roller
1
rotates about the shaft
16
, electricity is generated on the coil unit
132
so as to intermittently light up the bulbs
14
, thereby emitting a flashing light from the roller
1
via the light passage holes
111
.
Because the sheets
134
are disposed around the shaft
16
, magnetic lines of force passing through the sheets
134
are relatively few, thereby resulting in a limited induced electromotive force. In addition, the permanent magnet
135
is isotropic, and made from barium-based iron oxide powder. The number of magnetic lines of force generated therefrom is relatively small, thereby adversely affecting generation of electricity for illumination of the bulbs
14
.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a roller having a self-contained induction generator device of a unique structure which is capable of serving as a more effective electrical power source for lighting a light emitting unit disposed on the roller.
Accordingly, a roller of the present invention is adapted to be disposed rotatably on a horizontal roller shaft of a scooter. The roller includes a roller housing, a light-permeable rim element, a light emitting unit, and an induction generator device. The roller housing includes two housing halves, which are interconnected removably and which define an accommodation chamber therebetween. Each of the housing halves has a shaft hole adapted to be sleeved rotatably on the shaft in such a manner that the shaft extends through the shaft holes. The light-permeable rim element is sleeved fixedly on the housing. The light emitting unit is disposed within the rim element. The induction generator device is disposed within the accommodation chamber of the housing, and includes a mounting tube, a permanent magnet, a winding unit, and two ring-shaped vertical electrically and magnetically conducting plates. The mounting tube is adapted to be sleeved fixedly on the shaft. The permanent magnet is shaped as a vertical ring plate that is sleeved non-rotatably on the mounting tube and that has two opposite vertical side surfaces. The winding unit includes a sheave and a coil unit that is wound on the sheave and that is in electrical connection with the light emitting unit. The sheave is sleeved rotatably on the magnet, and is fixed to the housing. The conducting plates are mounted fixedly in the housing, and are in electrical and coaxial connection with the coil unit. Each of the conducting plates has an inner ring, an outer ring, and a plurality of elongated radially extending sheets which are angularly spaced apart from each other and which have radial inner ends that are formed integrally with the inner ring, and radial outer ends that are formed integrally with the outer ring. When the roller rotates about the shaft, electricity is generated on the coil unit so as to intermittently light up the light emitting unit, thereby emitting a flashing light from the roller via the rim element.
REFERENCES:
patent: 3569804 (1971-03-01), Studer
patent: 3710158 (1973-01-01), Bachle et al.
patent: 4096624 (1978-06-01), Gray et al.
patent: 4786834 (1988-11-01), Grant et al.
patent: 5115159 (1992-05-01), Takamiya et al.
patent: 5260616 (1993-11-01), Mizutani et al.
patent: 5828145 (1998-10-01), Nakamura
patent: 6118196 (2000-09-01), Cheng-Yon
Jung Wu-Chung
Lani Thanh
Morgan & Finnegan , LLP
Ramirez Nestor
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