Link 1 with guides a-a rotates about fixed axis A. Link 2 is designed as slotted link b having two extensions c which slide in guides a. The angle between the axis of slotted link b and guides a-a equals 90°. Slider 3 rotates about fixed axis B. The mechanism has the constant transmission ratio i₁₃=1. The motion of slotted link 2 is identical to the rolling of movable circle e without slipping around fixed circle d.
$935$LG,4L$