Mechanism for converting continuous rotation into 90 deg. oscillation to both sides with dwells 104:33

Input: green cam.
A coulisse mechanism is used to enlarge oscillation of the pink follower (from 20 deg. to 180 deg.).
Output motion of blue lever: Neutral rest – Turn left 90 deg. – Left rest – Return – Neutral rest – Turn right 90 deg. – Right rest – Return.
Its acceleration near neutral position is big.