Ratchet wheel 1 rotates about fixed axis A and has teeth a located on its inside surface. Driving link 3 rotates clockwise about axis A and is connected by turning pairs B to four pawls 2 which are held in engagement with teeth a of wheel 1 by springs 4. Link 3 rotates wheel 1 clockwise at the same speed and the pawls prevent counterclockwise rotation of wheel 1 with respect to link 3. But ratchet wheel 1 can rotate faster clockwise than link 3 from another drive (not shown).
$2710$RG,ML$