Segment gear 1 turns about fixed axis A and meshes with gear rack 2 which slides in fixed guides a-a. Rack 2 is round with annular teeth, enabling the rack to be additionally rotated about fixed axis F. Four-bar linkage ABCD is a parallelogram. The lengths of the links comply with the conditions: A͞B=D͞C and B͞C=A͞D. The angular velocities of links 1 and 4 are equal, as are the velocities of points B and C.
$2413$LrG,5L$