Cassette-like transcription adapting device

Claim 1

In combination with the cassette having take-up and feed spools with magnetic tape wound from one spool to the other, an adapting drive mechanism for use on a magnetic tape transcription machine having protruding take-up and feed wheels that rotate on vertical axes, whose perimeter protrudes from the said machine, said driving mechanism including a housing, a read head attached to said housing for reading a travelling magnetic tape; means for receiving in engagement with said read head a portion of magnetic tape travellingly disposed between take-up and feed spools of the cassette, said spools having their peripheries exposed at the center of the cassette; the improvement consisting of a drive transfer mechanism for transferring rotary motion from the feed wheel of the transcription machine to the take-up spool of the adaptor, the drive transfer mechanism comprising: a. a rotatable annular member carried by the housing to rotate about a vertical axis, said member having exterior perimeter surface and inner engaging means mounted on its interior perimeter surface adapted to engage over the protruding perimeter of the feed wheel of the transcribing machine whereby the rotation of the feed wheel rotates the annular member; and b. upper and lower idler wheels fixedly mounted on a vertically disposed axle, the lower idler wheel frictionally engaging and being rotated by the moving exterior perimeter surface of the annular member, the upper idler wheel being rotated by the rotation of its axle and the lower idler wheel, said upper idler wheel being adapted to frictionally engage the periphery of the take-up spool of the cassette to thereby rotate the same.