Friction cone b is keyed to shaft 1 and rotates about fixed axis A-A. Roller 2 can slide along shaft 3 on feather key d, rotates with this shaft about fixed axis B-B and is in contact at point K with cone b. Angle γ between axes A-A and B-B is equal to one half of the apex angle of cone b. Roller 2 is traversed along an element of the cone by screw 5 which rotates about fixed axis C-C and is connected by a screw pair to carriage 4 holding roller 2. The transmission ratio from shaft 1 to shaft 3 is i₁₃=ω₁/ω₃=n₁/n₃=(2πr)/(2πR-φh*sin(γ)) where ω₁, ω₃, n₂ and n₃ are the angular velocities and speeds (in rpm) of shafts 1 and 3, r is the radius of roller 2, R is the radius of the cross section of cone b passing through point D and perpendicular to axis A-A, h is the pitch of screw 5, and φ is the angle through which screw 5 is turned to traverse roller 2 from point D at the large end of the cone to point K.
$3473$CF,IV$