Eccentric 1, with its geometric centre at point B, is rigidly secured to fixed shaft a. Crank 2 is designed as a collar encircling eccentric 1. When link 5 rotates, links 4 are turned outward by the action of the weights mounted on them. The angle through which links 4 turn depends upon the angular velocity of link 5. The angle of swing of links 4 can be varied by clamping eccentric 1 in various positions on shaft a.
$813$LW,G$