Cylinder cam 1 with a helical groove rotates about fixed axis B in synchrony with the conveyer system that transfers the work-pieces from one inspection station to the next. Rolling a long shelf b, in engagement with each turn of the helical groove, are balls 3, each ball accompanying its workpiece a which is being transferred by the conveyer system from station to station. If the workpiece is within size, it is carried to the end by the conveyer system and drops into the within-size box. At the same time, its ball 3 rolls along all the turns of the helical groove on cam 1, drops down, rolls back into hole c in disk 4 which lifts it again to shelf b, and begins to roll in engagement with the helical groove again. If the workpiece is rejected at any inspection station, lever 5 is deflected from its central position, and stop 6, reciprocating with slide 7, runs up against lever 5. This turns lever 8 so that it throws ball 3 to the other side of cam 1 where it rolls along shelf d in engagement with the helical groove (shown by the dotted line). Now it accompanies rejected workpiece a and when ball 3 reaches the end of the helical groove, it lifts lever 2. Through a system of intermediate links, this deflects lever 9, releasing workpiece a which drops into the reject box.
$3250$CmL,SF$