Patent ID: 6547670
Filing Date: 2003-04-15
Classification: A63J

Abstract:
A stage element movement assembly for location below the surface of a stage deck comprising:(a) a first cable for disposition in a tunnel below the stage deck and extending in a first path in a first direction; (b) a first dog secured to said first cable for movement therewith in the tunnel; (c) an engagement member engaged with said first dog and adapted to extending upwardly through said channel in said stage deck; (d) a power driven winch for moving said first cable and first dog in said first path; (e) a second cable for disposition in a tunnel below the stage deck and extending in a second path in a direction at an angle to the direction of said first cable and crossing below said first cable; (f) spaced cable guide elements on opposite sides of said cable crossing and about which said second cable passes, said guide elements causing said second cable to be moved downwardly from the plane of its path to a level to pass below said first cable and thereafter return to be moved upwardly to the plane of its original path; (g) a pair of engagement elements secured to said second cable in spaced relationship; (h) a crossing dog having spaced engagement elements on its lower surface for engagement with said engagement elements on said second cable to effect driving action of said crossing dog by said second cable, the leading one of said engagement elements on said second cable disengaging from said crossing dog as said second cable is moved downwardly by said guide elements while the trailing engagement element remains engaged until it is moved downwardly, said leading engaging element reengaging said crossing dog upon return of the cable to its original path; (i) an engagement member engaged with said crossing dog and adapted to extend upwardly through a slot in the stage deck for engagement with a stage element to be moved; and (j) a power driven second winch for moving said second cable and crossing dog in said second path.