TRANSFORMED CINE PROJECTION SCREEN Russian patent published in 1996 - IPC

FIELD: equipment of stages. SUBSTANCE: shaft is carried by bearings 2 mounted under stage and is joined by means of coupling 3 of limiting moment to drive 4. Screen cloth 10 is connected with the aid of apron 9 passing through slit in floor to shaft with lifting platform 5. Platform is coupled with the aid of closed cable 6 through guiding pulleys 7 and pulling block 13 to load fixture 8. Blocks 11, 12 are put on ends of platform. Flexible guides 14, 15 are arranged on side of screen. Upper ends of guides are attached through pulling spring 16 to ceiling and lower ends are joined through units 11, 12 to floor. With switching on of drive shaft is set in motion and carries out movement of platform with the help of load fixture, apron and screen cloth. Flexible guides provide platform with capability of movement in parallel to floor and load fixture ensures pulling of cloth. EFFECT: simplified design of screen and increased reliability of usage. 2 dwg