Bent link 1 turns about fixed axis 0 and has two slots c whose axes are perploendicular to each other. Pins d of links 2 and 3 slide along slots c and are of a diameter equal to the width of the slots. Links 2 and 3 slide in fixed guides; p-p and q-q whose axes are perpendicular to each other. When link 1 turns about axis 0, links 2 and 3 are displaced in mutually perpendicular directions. Dispilacements x and y of links 3 and 2 are related by the condition x/y=b/a=const.
$1298$LG,MO$