Design a four-bar linkage to move the box through the three positions shown. Use points A and B to attach the mechanism to the box. Add a driver dyad to the mechanism (attach the dyad to link 2) to limit its motion to the range of positions shown, making the mechanism a six-bar linkage. Determine the length of all links and specify the location of all fixed pivot points with respect to the base. Include the following drawings: 

1) a drawing showing the method used to locate the two fixed pivots for the four-bar, 

2) a drawing that shows the construction of the dyad driver, 

3) a drawing showing the mechanism in the three positions, and 

4) a drawing showing all dimensions, do not show the dimensions given in the figure. 

Use CAD for all drawings and label the moving and fixed pivot points clearly. Points will be taken off if drawings are not properly labeled

 

250 184 43 17 43 typ. 90 A1 45 17 typ. 86 t . A2 145 52 typ. B2 86 typ. 0 A3 0 181 base B.O Fixed pivot points must be in the area marked "base" T67 all dimensions in mm