Four-bar reversing approximate circle-tracing mechanism‍

‍‍The orig­i­nals of the archive pho­tos are stored in the Musée des arts et métiers du Con­ser­va­toire national des arts et métiers (Paris, France); CNAM № 12154-0001, № 12154-0002.

‍‍I. I. Arto­bolevsky, N. I. Lev­it­sky. Tcheby­shev's Mech­a­nisms / In: P. L. Tcheby­shev’s Sci­en­tific Her­itage. Iss. 2. The­ory of mech­a­nisms. — Moscow-Leningrad: AS USSR. 1945. P. 27–28. (Russ­ian)

‍‍I. I. Arto­bolevsky, N. I. Lev­it­sky. Mod­els of mech­a­nisms of P. L. Tcheby­shev / In: The com­plete works of P. L. Tcheby­shev. Vol. IV. The­ory of mech­a­nisms. — Moscow-Leningrad: AS USSR. 1948. P. 212–213. (Russ­ian)