The lengths of the links comply with the conditions: A͞B=A͞C=b and B͞D=d. Crank 1, turning about fixed axis A, is connected by turning pair B to slider 2 which moves along cross-piece z-z of T-shaped link 3. Link 3 turns about fixed axis C. Bent link 4 is connected by turning pair E to link 3. Arm Eq of link 4 moves in slider 5, and arm Ep in slider 6, which is connected by turning pa i rD to slider 2. Slider 5 is connected by turning pair K to slider 7 which moves along cross-piece z-z of link 3. When crank 1 rotates about axis A, point K describes a conic section which is an ellipse when 2b/d<1, a parabola when 2b/d=1 and a hyperbola when 2b/d>1.
$1115$LG,Ge$