Each time the operator is projecting the start or end of what is to become an audio scene, he presses a store switch, commanding storage of the current frame count, thereby defining all the audio scenes on the film one after the other, for subsequent recording work. Thereafter, during recording work,...http://www.google.com/patents/US4501478?utm_source=gb-gplus-sharePatent US4501478 - Scene-start and -end reference indicator arrangement for projector storing scene-start and -end frame counts
