The lengths of the links comply with the conditions: A͞B=B͞C=C͞D=D͞A and E͞B=0͞F=a. Figure ABCD is a rhombus linkage. Link 4 has the form of a bent lever. Arm Bn of link 4 moves in slider 3 which turns about fixed axis F. Link 4 is connected by turning pair E to slider 2 which moves along fixed guides r-r. Sliders 1 and 9 move along fixed guides t-t. Points B and D trace a strophoid. Point B traces portion p-p of the strophoid, and point D traces portion q-q which is the mirror image of portion p-p with respect to axis 0x. The equation of the strophoid is y²=x²(a-x)/(a+x).
$1140$LG,Ge$