Shaft 1 with conical friction wheel a rotates about fixed axis A. Shaft 2 with conical friction ring b rotates about axis C-C. Cylindrical friction wheel 4, keyed to shaft 2, is in contact with cylindrical friction wheel 5 which is keyed to shaft 3 and rotates about fixed axis B-B. Shaft 1 can slide forward in bearing D and shaft 2 can be swivelled about axis B-B to bring wheel a into contact with the inner surface of ring b. The transmission ratio from shaft 1 to shaft 3 is i₁₃=ω₁/ω₃=n₁/n₃=(R/r)(r₅/r₄) where ω₁, ω₃, n₁ and n₃ are the angular velocities and speeds (in rpm) of shafts 1 and 3, R is the radius of the circle d on the inner surface of ring b which lies in the median plane perpendicular to parallel axes A and C-C, r is the radius of the circular cross section of conical wheel a in the same plane, and r₄ and r₅ are the radii of wheels 4 and 5.
$3466$CF,IV$