Connecting rod 2 of four-bar linkage ACDE has collar b encircling eccentric 1 which rotates about fixed axis E. Connecting rod 5 is connected by turning pairs B and F to rocker arm 3, turning about fixed axis A, and to slider 4, moving along fixed guide p. When eccentric 1 rotates about axis E, slider 4 reciprocates. The slider stroke is varied by changing the length, A͞B, of the rocker arm. This is done by means of a screw device which is not shown.
$1527$SC,6L$