Meshing gears 1 and 4, of equal pitch diameter, rotate about fixed axes A and B and are connected by turning pairs C and D to links 3 and 2 which are connected together by turning pair E. The lengths of the links comply with the condition: C͞E=D͞E. In the initial position (as shown), lines AC and BD are parallel to vertical axis By and are directed downwards. When gear 1 rotates, various points of connecting rods 2 and 3 describe the complex connecting-rod curves shown. The shapes of the curves can be changed by varying the distances A͞C and B͞D.
$2479$LrG,Ge$