Input: pink crank rotating continuously.
Lengths of pink crank : a
Length of blue bar: 6a
Distances between vertical stationary bearings: 1.5a
Green line is locus of a point on yellow bar.
The mechanism has a 3 prizmatic joints and 4 revolution ones.
The yellow bar has linear translating motion in a portion of its way. Time for tracing straight portion is more than 1/2 of working period.