MOTORIZED WINDOW SHADE SYSTEM

摘要

An improved Air Traffic Control Tower cab window shade system is presented, utilizing a faster motor than in prior art ATCT applications. The present invention's motor operates at 80 rpm and raises the shade material at 9.62 inches per second on a 2.3-inch diameter roller tube. This allows an average 8 foot high shade to fully raise in 10 seconds. The shade is half raised in about 5 seconds. The improved speed is due to a spring box at the bottom end of the shade, providing constant tension to the shade and permitting the shade to be retracted safely at higher speed without risking scratching the cab window glass.