Device for stabilizing the rotating speed of a record player
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
May 22, 2003
app pub date -
Feb 7, 2002
filing date -
Nov 20, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A device for stabilizing the rotating speed of a record player has a passive element fitted on the same shaft of a rotating, disk, which activates a record to rotate together. The passive element is formed with a surface expanding outward from a center portion fitted with a shaft and having its outer annular portion engraved with annular minute net holes. A sensor facing the positions of the net holes is provided under a printed circuit board for detecting the change of the shifting speed of the net holes. The signal data detected by the sensor is fed to a micro-processor to carry on operation, and after that, the value of the signal data is transmitted back and automatically modulates the voltage supplied to the rotating disk to let the rotating disk and the record rotate steadily.
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