Prime-mover dynamo plants – Miscellaneous – Drive gearing
Reexamination Certificate
2000-04-25
2001-10-23
Waks, Joseph (Department: 2834)
Prime-mover dynamo plants
Miscellaneous
Drive gearing
C360S090000, C310S083000
Reexamination Certificate
active
06307274
ABSTRACT:
BACKGROUND OF THE INVENTION
This application incorporates by reference Taiwanese application serial No. 88117750, filed Oct. 14, 1999.
1. Field of the Invention
The invention relates to a power generator, and more particularly to a power generator for a digital cassette cartridge in a cassette player.
2. Description of the Related Art
Audio cassette players or audio cassette recorders are widely used in daily life, for example, the audio cassette players equipped in vehicles, portable cassette players, and high-fidelity audio equipment for home entertainment.
As information technology and Internet are in widespread use, a large amount of audio information is converted into digital form and compressed using different compression formats, such a Motion Picture Engineering Group Audio Layer
3
(MPEG audio layer
3
or MP
3
) format. The compressed digital audio files have the advantages of convenience of storage, transmission, processing and improving the quality of playback and recording. When it comes to playing back, these digital audio files must be decompressed and processed by a multi-media computer or dedicated digital playback equipment compliant to the compression format, such as MP
3
player.
For the sake of playing back the digital audio files with the conventional audio cassette players, a Digital Cassette Cartridge was invented. A Digital Cassette Cartridge has a housing shaped like an ordinary cassette tape, and it is designed to fit conventional audio cassette players for playing back the digital audio files stored in this Digital Cassette Cartridge. The Digital Cassette Cartridge includes electronic devices, such as memory and processors, for the storage of digital audio files and conversion of digital audio files into an audio signal. The audio signal is transmitted to the audio cassette player that the Digital Cassette Cartridge is put into. Therefore, a power supply for the electronic devices must be included into the Digital Cassette Cartridge because the Digital Cassette Cartridge is put into the cassette player where an external power cable cannot connect. In regard to this implementation problem, a possible approach is to equip the Digital Cassette Cartridge with batteries. However, since the Digital Cassette Cartridge is small in size, it is not suitable to be equipped with batteries of high capacity of energy. Thus, if the time of playback audio data is longer than the time that the batteries can supply power for the Digital Cassette Cartridge, users are required to replace the batteries frequently with fully charged ones. It makes the use of the Digital Cassette Cartridge inconvenient and reduces the purchaser's demand to the Digital Cassette Cartridge.
SUMMARY OF THE INVENTION
It is therefore an object of the invention to provide a power generator for a Digital Cassette Cartridge. The power generator is equipped in the Digital Cassette Cartridge. When the Digital Cassette Cartridge is put into a cassette player and then a user presses the“Play” button of the cassette player, the power generator is driven by the rotating reel shaft that is designed for rotating the magnetic reels of ordinary cassette tapes. The power generator then produces electrical power suitable for the electronic devices inside the Digital Cassette Cartridge for operations such as playing back. By utilizing the power generator according to a preferred embodiment of the invention, the Digital Cassette Cartridge can operate properly without any battery with any cassette player, making it convenient to users.
In accordance with the object of the invention, a power generator for a Digital Cassette Cartridge, which is put into a cassette player for playing back the digital audio files stored in the Digital Cassette Cartridge, is provided. The cassette player contains a reel shaft for driving the power generator of the Digital Cassette Cartridge. The power generator includes two gears, a magnetic object a coil and a power supply. The first gear is coaxially engaged with the reel shaft. The second gear rotates as the first gear rotates. The magnetic object is coaxially mounted and is conjointly rotatable with the second gear. The coil produces an alternating current as the magnetic object rotates. The power supply receives the alternating current and converts the alternating current to a direct current, which is suitable for the operation of the Digital Cassette Cartridge.
As for the way of driving the second gear, the first gear can engage with the second gear or the first gear can drive the second gear by a roller chain. The first gear and second gear can also be replaced with other rotatable objects, such as wheels. In the approach of using the wheels, the first wheel can drive the second wheel by friction or through a transmission belt.
REFERENCES:
patent: 3779483 (1973-12-01), Inoue
patent: 3800212 (1974-03-01), Branco et al.
patent: 4001887 (1977-01-01), Platt et al.
patent: 4333172 (1982-06-01), Chen
patent: 5614779 (1997-03-01), Zafferri
patent: 5668414 (1997-09-01), Takahashi et al.
patent: 5821658 (1998-10-01), Boggs, III
patent: 0751445A1 (1977-01-01), None
patent: 11089121A (1999-03-01), None
patent: 8401041 (1984-03-01), None
Leadtek Research Inc.
Rabin & Champagne PC
Waks Joseph
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