Lever 1 is oscillated about fixed axis A by intermediate link 7 from a drive which is not shown. Lever 1 is rigidly attached to gear 4 which meshes with gear 5, turning about fixed axis B. Rigidly attached to gear 5 is crank 3 whose pin a slides along slot b of lever 2 which turns freely about axis A. Lever 2 transmits reciprocating motion to intermediate link 6 which is connected to the driven part of the mechanism (not shown). Thus the oscillation of lever 1 is converted into double oscillation of lever 2.
$1737$GL,4L$