Cine camera with sound transfer system onto sound recording film track - with system to delay passage of information to sound track

摘要

A sound film camera with a system to delay transfer of round information to the round track of the film has an electrical damping device consisting of a damping transistor (18) used as a semiconductor resistance device, with its basis coupled to a time capacitor (20). A control transistor (21) is used to control the circuit during charge up and discharge of the capacitor (20). The damping transistor (18) operates for a time determined by the charging variation of the time capacitor (20) and when film speeds deviating from normal running speeds (eg. 18 frames/sec) are used a circuit (24) is operated in which the damping transistor (18) is continuously incoporated.