Automatic retrieval apparatus

Claim 1

An automatic retrieval apparatus for use with an information containing film in a roll form, arranged to control driving of said information containing film by reading marks provided in said information containing film so as to correspond to respective frames thereof, said retrieval apparatus comprising a plurality of detecting means corresponding to a plurality of channels for detecting said marks so as to produce a plurality of detecting signals, a plurality of latch means which are respectively set by the corresponding detecting signals, a calculation processing means which effects a predetermined calculation corresponding to the detecting of said marks when one of said plurality of latch means is in its set state and which produces a signal for resetting said one latch means upon completion of the calculation processing, said calculation processing means further being arranged to effect said predetermined calculation in a sequential order when said plurality of latch means are being set simultaneously by said detecting signals by resetting the first latch means after the calculation corresponding to the first channel is completed and executing the calculation corresponding to the next channel following setting of the next one of said plurality of latch means.