DISPOSITIVO PER TRASCINARE A VOLONTA' IN ROTAZIONE PASSO A PASSO UN ALBERO CONDOTTO A PARTIRE DA UN ALBERO MOTORE CHE E' ANIMATO DI UN MOVIMENTO DI ROTAZIONE CONTINUO ED ININTERROTTO IN UN SENSO INVARIABILE

摘要

A device for rotating at will, step by step, a shaft (2) driven from a drive shaft to which is imparted a continuous uninterrupted rotational movement in an invariable direction, comprising means for transforming the continuous rotational movement of the drive shaft into an alternating rotational movement of an intermediate rotary member (7), disengageable coupling means (9 to 13) and a free wheel device (17), interposed between the intermediate rotary member (7) and the drive shaft (2), and means for controlling the disengageable coupling means adapted so that the driven shaft is locked in rotation with the intermediate rotary member only when this latter effects a rotational movement in the appropriate direction.