Plate cams 1 and 2, keyed to shaft 17, rotate about fixed axis A and transmit oscillating motion to either of two levers, 3 or 4, keyed to shafts 19 and 18 which oscillate about fixed axes G and F and operate packing mechanisms (not shown). When sliding disk 5, of the same diameter as the outside diameter of cams 1 and 2, is in its right-hand position (as shown), roller a of lever 4 rides the disk without dropping into the recess of cam 2 so that shaft 18 has a dwell, but shaft 19 has its oscillating movement. Shaft 21 rotates about fixed axis B at the same speed as shaft 17 and, through meshing worm 15 and worm wheel 16, drives shaft 20, to which cylinder cam 6 and disk 7 are keyed, about fixed axis E. Disk 7 has two slots. As cam 6 rotates, its follower roll 8 shifts rods 22 to the left, compressing springs 9 on the rods and pressing sliding block 10 against disk 7. When one of the slots of the disk reaches the upper position, sliding block 10 is shifted by spring 9 to the left, turning bellcrank lever 11 about a vertical axis so that pin d of the lever, between the flanges of sleeve 12, shifts the sleeve and disk 5 (attached to the sleeve) to the left, adjacent to cam 1. This engages the oscillating movement of shaft 18 and disengages that of shaft 1. As cam 6 continues to rotate, roll 8 and rods 22 are shifted to the right, compressing springs 13. When the second slot of disk 7 reaches its upper position, sliding block 10 is shifted by springs 13 to the right, thereby turning lever 11 so that its pin d shifts disk 5 back to its position adjacent to cam 2.
$3267$CmL,SE$