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The lengths of the links comply with the conditions: A͞D=D͞G=D͞B, B͞E=G͞F and E͞F=B͞G. Figure BEFG is a parallelogram linkage. Link 1 rotates about fixed axis A and is connected by turning pair D to link 3 which, in turn, is connected by turning pairs B and G to link 4 and to slider 2. Slider 2 moves along fixed guides p-p whose axis is parallel to axis Ax. Link 5 is connected by turning pairs F and E to slider 2 and to link 4. When link 1 rotates about axis A, link 4 has rectilinear translation along axis Ay.