TRANSFORMED FOOTLIGHTS Russian patent published in 1995 - IPC

FIELD: theater equipment. SUBSTANCE: screw couple is mounted inside trap of the stage floor. Nut of the couple is fixed in vertical, and screw and hinge of the cap are connected for combined movement along height. Gadget for fixing supporting rod is made in form of spring-loaded oblique washers; the washers are spring-loaded relatively axis. Supporting rod has shape of two-sided wedge. The rod has one end disposed between oblique washers and connected with axis mounted in longitudinal slot. To guide light flux along plotting board of the stage at angle to top or down, front edge of the cap is lifted and cap hinge is lifted also if necessary. Cap is sustained by supporting rod by means of friction force created in wedge couples by forces of springs. EFFECT: improved reliability of operation. 2 dwg