Links 1 and 3 slide in parallel guides b and a with the distance k between their axes. Link 2 slides in guide c whose axis is perpendicular to those of guides a and b. Link 1 is connected by turning pair. A to link 4 along whose slot d pins e of links 2 and 3 slide. The displacement of link 3 by the amount z is the result of the displacements of links 1 and 2 by the amounts x and y. Thus z=xy/(k-y) where k is a constant dimension of the mechanism. Thus the mechanism multiplies two quantities x and y which are entered as the displacements of links 1 and 2.
$1277$LG,MO$