Shaft 1 rotates about fixed axis A-A and carries rigidly attached guide a. Crosspiece 4 slides along guide a and is connected by turning pairs B and C to round eccentrics 2 which are enclosed in housing 3. When shaft 1 rotates, eccentric weights 2 are turned by centrifugal force about axes B and C, thereby shifting housing 3 along shaft 1. The link controlling the speed of shaft 1 is connected to housing 3.
$3148$SmC,G$