Link 1 of the clutch is keyed to shaft 7 and rotates about fixed axis A. Link 9 is keyed to shaft 8 and rotates about fixed axis B. Engaging collar 4 slides along guide b of link 9. Link 10 is connected by turning pairs D and C to collar 4 and to link 6 which, in turn, is connected by turning pair E to link 11. Link 11 is connected by a screw pair to screw 12. Roller 5 rotates about axis F of link 6 and exerts pressure on link 14. Link 13 can be adjusted to the required position by screw 12. Friction shoes 2 engage rim a of link 1 to engage the clutch when collar 4 is shifted to the left. When collar 4 is shifted to the right, spring 3 spreads the friction shoes and the clutch is disengaged.
$3453$CF,C$