Input: pink oblique crank rotating full revolution.
Oblique angle A1 = 45 degrees. A1 cannot exceed 90 degrees.
Output: green fork shaft performing angular oscillation.
Oscillating angle A2 = 2*A1 = 90 degrees.
Axes of all revolution joints intersect at a common point.
The last scene of the video shows the case when A1 = 85 degrees, A2 = 170 degrees.
Inventor files of this video: