FILM-TAPE SYNCHRONIZATION SYSTEM

摘要

In the disclosed system, a control circuit drives a projector by comparing the speed of the projector with the rate of clock signals from a pulse generator. When the projector reaches a start index on the film a detector disables the pulse generator so that the control circuit stops the projector. At the same time the detector connects the control circuit to the tape which has clock signals recorded along with the sound. As soon as the tape reaches the point where the sound and clock signals begin the control circuit restarts the projector and keeps it running in synchronism with the tape.