Bar mechanism for reversing rotation 2

It is a combination of two sine mechanisms sharing a common yellow slider. Input: green (or violet) crank. Output: the other 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 is vertical. The mechanism becomes a regular coupling (no reversing) when the cranks are set to be always parallel.