Digital audio signal player

Details Digital audio signal player Digital audio signal player

2008-07-15

2008-07-15

Feild, Joseph (Department: 2627)

Dynamic optical information storage or retrieval

Dynamic mechanism optical subsystem

Optical storage medium support

Reexamination Certificate

active

11312754

ABSTRACT:
An audio signal player includes a turntable unit, a conductive touch-control plate on top of the turntable unit, a round disk, a round disk central shaft made of electricity-conductive materials and joined to the touch-control plate, a reflective-type photoelectric interrupter secured in the touch-control plate for finding out rotational speed and direction of the round disk, and a photoelectric interrupter in a lower end of the turntable unit for finding out rotational speed and direction of the turntable unit; when the round disk is manually rotated, the audio signal player will produce scratch sound effects according to the rotational speed and direction of the round disk; the user is allowed to touch the touch-control plate so as to produce a touch signal, thus making the audio signal player produce a particular scratch sound effect according to the touch signal.

REFERENCES:
patent: 4825314 (1989-04-01), Maekawa et al.
patent: 5101398 (1992-03-01), Inoue et al.
patent: 6680896 (2004-01-01), Shiwa
patent: 6877164 (2005-04-01), Lee

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