Abstract: Recording-reproducing apparatus utilizing as the recording medium a rectangular sheet of paper or the like having a spiral magnetic track on one surface and printed material on the opposite surface for audiovisual educational purposes. For electrically controlling the operation of the apparatus, switches for playback, recording, stop and backspacing operations are connected to a reversible drive motor via a control circuit comprising a relay with a plurality of relay contact sets. The control circuit includes means for automatically suspending the rotation of the drive motor in response to a stop signal generated when, during playback, the magnetic head reaches a specific zone or zones on the track.

Abstract: A teaching machine on which is replaceably mounted a rectangular sheet of paper or the like with a spiral magnetic track on one surface, which is directed downwardly, and with printed material on the other surface for visual presentation of the subject of audio information prerecorded on the track. A movable magnetic head under the sheet follows its track for playback or recording. To afford closer contact between head and sheet and hence to improve the playback quality, a hinged holder frame secures the sheet to the machine casing at its marginal edges only, and the head is spring biased into abutting contact with the yieldably supported sheet. The head itself is supported out of the perpendicular to the plane of the sheet so as to remain in intimate contact therewith throughout its travel along the complete track on the sheet.