Crank 1 rotates about fixed axis A and is connected by turning pairs B to connecting rods 5 which, in turn, are connected by turning pairs C to rocker arms 6 turning about fixed axes D. The lengths of all connecting rods 5 are equal to one another, as are those of all rocker arms 6. Each four-bar linkage ABCD is connected by turning pair C to a pawl a which engages a ratchet wheel 2. When crank 1 rotates about axis A, pawls a turn ratchet wheels 2 intermittently clockwise. Rigidly attached to ratchet wheels 2 are gears 3 which mesh with driven gear 4 which they turn intermittently counterclockwise.
$1822$LR,ML$