Patent ID: 7011795

Claim:
An apparatus for rotating a disk having a plurality of scent elements supported thereon, the apparatus comprising; a platter having a hub extending upwardly from a center thereof, said hub configured to removably engage the disk in a predetermined rotational position and defining an axis of rotation; a motor coupled to said platter for rotating said platter about said axis of rotation; a first position indicator disposed on said platter to rotate about said axis of rotation through a first circular path, wherein said first position indicator comprises at least one notch formed on a ring extending upwardly from said platter and concentric with said hub; a first sensor arranged adjacent to a first point on said first circular path and generating a signal when said first position indicator is rotated to said first point; and a control unit coupled to said first sensor and said motor, said control unit controlling current delivered to said motor to operate said motor and altering the current upon receiving said signal from said first sensor.