CAM-LEVER MECHANISM WITH FREE MOTION OF THE DRIVEN LINK

Rigidly attached cam 5 and disk 1 rotate about fixed axis C. Follower 6 oscillates about fixed axis B and carries roller 9 which rolls along the contour of cam 5. Pin d of disk 1 slides along slot e in lever 8 which oscillates about axis B. Follower 6 has projection a with pin b which slides along slot f of intermediate link 2. Link 2 is connected by turning pair D to link (secondary follower) 7 which oscillates about fixed axis A. Pawl 4 turns about axis E of link 2 and is held in engagement with projection a of follower 6 by flat spring 3. Pawl 4 has thrust pin c. When cam 5 rotates, follower 6, together with roller 9 and projection a, turns about axis B. Through pawl 4, projection a lifts link 2, turning link 7 about axis A. Link 7 ( remains in this position until slotted lever 8, turned about axis B by pin d of disk 1, pushes thrust pin c and disengages pawl 4 from projection a. At this, link 7 has a small free motion within the limits allowed by slot f which slides along pin b of follower 6.
$3179$CmL,ML$