Reel 1 rotates about fixed axis A-A. Open flexible link 4 runs 360° around reel 1, over pulley 2 and two identical guide rollers 3 and 5. Pulley 2 and rollers 3 and 5 rotate about fixed axes B, C and D. The mechanism transmits rotation between axes A-A and B which intersect at right angles. The transmission ratio between reel 1 and pulley 2 is i₁₂=ω₁/ω₂=n₁/n₂=R/r where ω₁, ω₂, n₁ and n₂ are the angular velocities and speeds (in rpm) of reel 1 and pulley 2, R is the radius of pulley 2 and r is the radius of reel 1.
$3500$SFL,ML$