Magi Oman

A Parallel-Guide Rig


Using the principle that tracks drafting-board parallel rules, Richard Gold, Technical Director for the production of Mississippi Nude at the Yale School of Drama, enabled a single operator to move a curtain track upstage and downstage. The movable track was hung parallel to the plaster line and perpendicular to the three stationary tracks from which it was suspended. Aircraft cables A and B, which ran through sheaves mounted at the ends of the movable track, were secured at the ends of the outer stationary tracks, forming the same —X— rig that guides a parallel rule. Figure 1 presents the rig in plan; Figures 2 and 3, its details. Adding a running line to one end of the movable track allowed a single operator ...

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