Input: orange crank.

Lower point of violet bar draws intersection (violet curve) of yellow hemisphere and cone (inner surfaces).

Hemisphere diameter: D1 = 100. Cone opening angle A = 40 deg. Their offset: E = 25

Distance between two spherical joints of violet bar: 0.5 D1.

Distance between lower point and lower spherical joint of violet bar: 0.5 D1.

Center of yellow hemisphere and center of lower spherical joint of violet bar are coincident.

Rotary axis of orange crank lays in plane created by center of lower spherical joint of violet bar and axis of yellow cone. Distance of rotary axis of orange crank and axis of yellow cone: 2 E.

Angle of rotary axis of orange crank and axis of green slider: 0.5 A.