Crank 1 rotates about fixed axis A and is connected by turning pairs B to links 2. Links 8 are connected by turning pairs C and D to links 2 and to ratchet wheels 4 which are rigidly fastened to gears 5. Gears 5 mesh with fixed gear 6 and are connected by turning pairs D to link 7 which rotates about axis A. The sum of the radii of gears 5 and 6 is R₅+R₆=A͞D. Pawls 3 are connected by turning pairs C to links 8 and engage ratchet wheels 4. When crank 1 rotates about axis A, pawls 3 turn ratchet wheels 4 and gears 5. Gears 5 roll around gear 6 and thereby rotate link 7 intermittently clockwise.
$1831$LR,ML$