Plate cam 1 rotates about fixed axis A and transmits motion to follower 2, which oscillates about fixed axis B. Intermediate link 5 is connected by turning pairs C and D to follower 2 and to piston 3. Follower 2 consists of two rigidly attached members, a and b. The piston is pivoted to member a. Attached to member b is spring 4 which can be adjusted along link 2 to vary its tension. Spring 4 holds the roller of follower 2 in contact with cam 1.
$3294$CmL,FD$