| 摘要 |
<p>A tone arm assembly is provided with an electromagnetic means for moving a tone arm to the horizontal direction, an electro-magnetic detecting means connected to a rotating shaft of the tone arm so as to move integrally with the electro-magnetic means, a control means for applying a motional feedback to the electro-magnetic means, and a velocity setting means for setting the moving velocity of the tone arm in the horizontal direction, whereby a constant velocity servo is applied through the control means.</p> |
