Ratchet wheel 5 rotates about fixed axis C. Link 3 of link-gear mechanism ABC is connected by turning pair D to pawl 4 which is held against ratchet wheel 5 by spring 7. In one complete revolution of crank 1 about fixed axis A, pawl 4 turns ratchet wheel 5 through the angle α=360°/z, where z is the number of teeth on ratchet wheel 5. Pawl 6 turns freely about fixed axis E and prevents reverse rotation of ratchet wheel 5.
$1815$LR,6L$