Cam 1 rotates about fixed axis B and its external surface is a spherical surface of radius r. Elements of cam surface a are straight lines passing through point A. Follower 2 oscillates about fixed axis A and carries tapered roller 3 which rotates freely about axis C of follower 2 and rolls along cam surface a. Axes A, B and C intersect at a common point. Roller 3 is held in contact with cam 1 by a spring (not shown).
$3050$SmC,3L$