FIRE-PROOF CURTAINS Russian patent published in 2005 - IPC

FIELD: equipment for protection against fire, particularly to protect auditorium against fire appeared on stage with the use of flexible barrier made as curtain.

SUBSTANCE: fire-proof curtain is formed of web including several layers of heat-resistant material and additional kentledge arranged in lower curtain part. Kentledge is wound round rotary drum connected with electrical and standby manual drives. Drives include electric and manual elevator-descender systems. Curtain has sealing frame including stationary vertical members, horizontal member, movable members and rotary swinging pressing member. Curtain is provided with curtain dropping speed stabilization system including several weights located on different heights and connected one to another by flexible tie wound on multiple-pass pulley installed on drum shaft and damper. Device is operated in the following way. As fire occurs on stage fixing force is manually or automatically released from drum and curtain begins to move downwards under the action of kentledge. Pulley is rotated and weights are consecutively lifted to prevent curtain acceleration due to increasing curtain weight. When kentledge reaches floor weights reach dampers and stop. Swinging pressing member presses curtain to horizontal member and movable members press curtain to provide stage portal air-tightness, to localize fire on stage and to protect auditorium against hazardous combustion products.

EFFECT: increased efficiency.

3 dwg