Workpiece a being sorted presses against crosspiece 1 which, by means of pin 2, turns ratchet wheel 3 through a certain angle depending on the size of workpiece a. Due to the action of spring 5, pawl 4 slides off a tooth of wheel 3 and, when crosspiece 1 is shifted to the side, releasing workpiece a, the positions of ratchet wheel 3 and pawl 4 turn out to be set in accordance with the size of workpiece a. If the size is within the specified tolerances, pawl 4 remains on the middle tooth of wheel 3 and the rear end of lever 6 does not engage plunger 7. Then, as cam 9 rotates about fixed axis A, plunger 7, held in contact with cam 9 by spring 10, is retracted, and workpiece a drops into the within-size box. If workpiece a is off-size, then pawl 4 remains on one of the extreme teeth of ratchet wheel 3, lever 6 engages plunger 7 by dropping into recess 8, plunger 7 is not retracted and the workpiece does not drop into the within-size box. As cam 9 continues to rotate, the workpiece is pushed beyond spring-actuated shutter 11 into the reject box. Crosspiece 1 is held in contact with the workpiece by spring 13 and follower 15 which oscillates about fixed axis B and carries roller 16 rolling along the working surface of cam 9.
$3245$CmL,SF$