Link 1 rotates about fixed axis t-t and is connected by a screw pair to link 2 which slides along axis r-r of link 11. Sliding along link 11 on a key is spiral gear 12 which meshes with spiral gear 10 (crossed helical gearing) of link 3. Gear 12 fits between the prongs of link 2 which traverses it along link 11. Link 3 is connected by a screw pair to slider 8 and rotates about axis q-q which is perpendicular to axes t-t and r-r. Link 3 is connected by turning pair E to link 13 which slides in fixed guide s in the direction parallel to axes t-t and r-r. Link 7 is connected by turning pair B to slider 8 and by sliding pair C to link 9 which turns about fixed axis A. Link 9 is connected by a sliding pair to slider 4 which, in turn, is connected by turning pair D to slider 5. Slider 5 is connected by a screw pair to link 6 which rotates about fixed axis p-p. The screw threads on link 3 have a helix angle greater than the angle of friction. One factor is entered by rotating link 6 to displace slider 5 vertically by the distance y₁. The second factor is next entered by rotating link 1 to displace link 3 vertically by the distance y. This moves point B along the axis of link 3 by a distance equal to z=(1/a)yy₁, where a is a constant dimension of the mechanism. As slider 8 moves along link 3 it rotates the link. This is transmitted through crossed helical gears 10 and 12 to link 11 whose rotation is proportional to displacement z.
$2255$LS,MO$