Link 3 of the clutch is keyed to shaft 6 and rotates about fixed axis A. Link 2 is keyed to shaft 7 and rotates about fixed axis B. Engaging collar 4 slides along guide a of link 2 and is connected by turning pair C to link 5 which consists of shackle b connected by screw pairs to screws d. Cam 1 turns about axis D of link 3 and is connected by turning pair F to link 5. When collar 4 is shifted to its extreme left-hand position, working surface b of cam 1 presses the flange of link 2 against link 3. The clutch is disengaged by shifting collar 4 to the right. The position of cam 1 with respect to collar 4 is adjusted by turning shackle b on screws d to lengthen or shorten link 5.
$3451$CF,C$