Cross-member a is connected by turning pairs A and B to sliders 3 and 4, and is rigidly secured to shaft 1 which rotates in fixed bearings that are not shown. Disk b is rigidly secured to shaft 2 and has two diametral slots c which are perpendicular to each other. When shaft 1 rotates clockwise, sliders 3 and 4 move along diametral slots c of disk b, transmitting rotation to shaft 2 in the same direction. The transmission ratio between shafts 1 and 2 is i₁₂=ω₁/ω₂=2. Hence, the angle of rotation of link 1 is always twice that of link 2.
$1396$LG,C$