The link to be set is slide 3 which can be moved along fixed guides a-a. Lug b of slide 3 has notch c. Intermediate link 9 has knife edges D and B which enter notch c and notch f of link 2. When gear 1 is turned, rotation is transmitted through intermediate gears 5, 6, 7, 8 and 9 to segment gear 2 which turns about fixed knife edge A, setting slide 3 in the required position. Spring 4 eliminates backlash in the gearing and holds the links tightly in contact with one another.
$2939$CxG,ML$