Cylindrical side cam 1 rotates about fixed axis A-A. Cam surface a is a helical surface. Follower 2 reciprocates in fixed guide B along axis D-D, parallel to axis A-A, and has head b. The lower surface of head b, in contact with cam 1, is a helical surface identical to cam surface a. Link 3 limits the travel of follower 2. Cam 1 is turned with handle A. The mechanism is used to clamp follower 2 in its extreme position between cam 1 and link 3.
$3031$SmC,3L$