Cylinder 1 of radius r rotates about axis A-A which can be turned to various angles φ about fixed axis 0 and have its bearings b clamped in the required position in circular slots d. Cylinder 1 is in contact with semispherical roller a of radius R which rotates about fixed axis 0B with shaft 2. The transmission ratio from cylinder 1 to shaft 2 is i₁₂=ω₁/ω₂=n₁/n₂=(R/r)cos(φ) where ω₁, ω₂, n₁ and n₂ are the angular velocities and speeds (in rpm) of cylinder 1 and shaft 2, and φ is the angle between axes A-A and 0B. The pressure required between the friction surfaces to transmit a torque is developed by spring 3.
$3462$CF,IV$