Stepped driving pulley 1 is connected to idle pulleys 2 and 3 by open belt 4 and crossed belt 5. When the lever of link-gear belt shifter 6 is moved to the right, open belt 4 is shifted to working pulley 7 and the driven shaft on which pulley 7 is rigidly mounted begins to rotate in the same direction as driving pulley 1. When the lever of shifter 6 is moved to the left, crossed belt 5 connects working pulley 8 to driving pulley 1, and driven pulley 8 together with its shaft begin to rotate in the opposite direction to driving pulley 1. The transmission ratios for direct and reverse rotation of the belt drive differ in both magnitude and sign.
$990$LG,4L$