Schiller & Pandiscio
Variable geometry vacuum column
 A tension regulator for magnetic recording tape, which comprises a plurality of side members forming an encased columnar space having an open top for receiving a flexible tape loop. One of the side members is adjustably positionable relative to the other side member for changing the cross-sectional area of the columnar space in order to vary the tension applied to the flexible tape being received by the tension regulator. 
King Instrument Corporation
B G B G B B
B65H G11B B65H G11B B65H B65H
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David W. David O.
Kincheloe Neathery