ley, 41, is thrown into connection with its shaft by pins on its face being brought in con tact with similar pins or projections on the side of the circular plate, 42 (seen in dotted lines in figt1re 2), said pulley being moved laterally on the shaft, 38, in the usual manner by the fork, 43, embracing a groove in the hub of the pul ley, the shipper bar, 44, and the lever, 45.