| 摘要 |
A device for sequentially positioning a tape head to consecutive tracks of a cartridge-type multitrack recording tape, wherein a short section of heavy-type tape having a small rectangular opening formed therein is spliced into the tape loop. A sprocket gear having an associated spring-biased detent pawl is so located that the rectangular opening will successively engage one tooth of the gear at a time for each complete cycle, or revolution, of the tape, to cause the gear to rotate an angular increment determined in accordance with the number of teeth thereon. A cam is rotatably controlled by the gear for moving a cam follower, which is attached at one end to the tape head, for moving the tape head transversely across the tape to the next consecutive track. A manually operable indexing arrangement is provided for controlling the cam to move the tape head to any selected track on the tape.
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