Importance

Loading Importance Indicators...

Abstract

A stage element movement assembly includes a first cable in a tunnel below the stage deck and extending in a first path in a first direction. A first dog is secured to the first cable for movement therewith in the tunnel, and an engagement member is engaged with the first dog and will extend upwardly through a slot in the stage deck for engagement with the stage deck for engagement with the stage element to be moved. A second cable is provided for disposition in a tunnel below the stage deck in a second path in a direction at an angle to the direction of the first cable and crosses below the first cable. Linearly spaced cable guide rollers on opposite sides of the cable crossing cause the cable to move downwardly to pass below the first cable and thereafter be moved upwardly to the plane of its original path. Engagement elements are secured to the cable in spaced relationship and a crossing dog having spaced engagement elements are engaged with the engagement elements on the second cable. The leading engagement element disengages from the crossing dog as the second cable is moved downwardly while the trailing engagement element remains engaged until it is moved downwardly. At this point, the leading engaging element reengages the crossing dog. An engagement member engaged with the crossing dog extends upwardly through a slot in the stage deck for engagement with a stage element to be moved, and power driven winches move the cables and thereby the stage elements.

Loading the Abstract Image...

First Claim