Bar mechanism for reversing rotation 3

It is a combination of two slider-crank mechanisms sharing a common green slider. Input: pink crank. Output: blue crank. It turns at the same input velocity but in opposite direction. Input and output are coaxial. Disadvantages: - Inertia forces created by reciprocating parts. - Dead positions (when output crank and its conrod are in line). The mechanism becomes a regular coupling (no reversing) when the cranks are set to be always parallel.