Drive principle for sound tape mechanism - where rewinding and winding-on drive is effected by three constantly meshing pinions

摘要

The running direction of the tape is determined by a braking rocker and two dogs. These are also used to arrest the tape. The tape is kept constantly tensioned by means of a pressure roller adjustable by spring tension when the mechanism is operated by a sleeve mounted rotatably on a base. When a single driving motor is used, the winding-on tension is transmitted from the motor along a flexible shaft to the pinions by a worm gearing. The head support can be guided by three pins pressed into the support plate horizontally.