FIELD: mechanical engineering; devices providing reversible step turning with stops. SUBSTANCE: mechanism has two links 4, 5 with slots 7 designed for engagement with rollers 8 of driven member 9 and hinge coupled with arms of corresponding cranks to form parallelogram mechanism. Mechanical coupling of cranks is made in form of shackle 10 or gear drive. EFFECT: enlarged operating capabilities. 3 cl, 4 dwg
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