Method of and means for checking the correlation of two data carriers

摘要: If a cine film is to be projected the accompaniment of sound track on separate tape it necessary cheek that and are correctly coordinated. This ensured by reading code mark from using slow or stop motion film. The point at which slowed stopped used evaluate relative position with respect thus check correct coordination present. evaluation may take place visually automatically. In latter case prolonged presence correlation marking in sensing can signal existence whereas absence such energize warning lamp deactivate drive.