The lengths of the links comply with the condition: D͞E=E͞F=F͞G=G͞C=E͞M=M͞G. Figure EFGM is a rhombus linkage. Two identical meshing gears, 1 and 2, of radius R, rotate about fixed axes A and B, and are connected by turning pairs D and C to links 4 and 5. Lines AD and BC make angles of ϕ with axis Ox. Links 4 and 5 are connected together by turning pair F and to links 6 and 3 by turning pairs E and G. Links 6 and 3 are connected together by turning pair M. When gear 1 rotates about axis A, point M describes an ellipse with the equation x²/a²+y²/b²=1 where a=(A͞D+B͞C)/2 and b=(A͞D-B͞C)/2.
$1769$GL,Ge$