Segment gear 1 turns about fixed axis A and meshes with segment gear 2 which turns about fixed axis B. Links 3 and 4 are connected by turning pairs D and C to segment gears 1 and 2, and to each other by turning pair E. The dimensions of the links comply with the conditions: r₁= r₂, A͞D=B͞C and D͞E=C͞E, where r₁ and r₂ are the pitch radii of segment gears 1 and 2. When segment gear 1 turns, point E describes a straight line perpendicular to line AB.
$2526$LrG,GI$