Links 4 and 5 slide along fixed guides p and q whose axes are parallel to axes y and x. Pin a of link 1 slides along the slots of links 4 and 5. Link 1 slides in guide m and turns about axis 0-0. Link 1 is moved in guide m by slider-crank linkage ABC which moves slider 6 along axis 0-0 of link 3. Through intermediate link 7 slider 6 turns gear 8 about axis E. Gear 8 meshes with the gear rack of link 1 and rotation of the gear leads to the sliding of link 1 in guide m. Link 1 is turned about axis 0-0 by turning head d of link 3. Pin c of link 3, sliding along slot f-f of slider 6, turns the slider. The mechanism converts polar coordinates into rectangular (Cartesian) coordinates and vice versa. Coordinate x is entered by the position of link 5; coordinate y by the position of link 4. Polar coordinate α is entered by turning link 3 about axis 0-0; polar coordinate r by turning link 2.
$1763$GL,MO$