Input: blue crank.
Output: green diskZg/Zp = 2n/(n-2)
R + r = B.sin(Pi/n)
Zg: tooth number of the stationary grey gear.
Zp: tooth number of the pink gear.
N: number of slots on the green disk, Here n = 4
R: distance from axis of the pink gear to rotary axis of the blue crank.
r: radius of the pink crank.
B: distance between two stationary bearings.
Blue ring is for keeping the green disk immobile during its dwell.
The output acceleration is reduced considerably in this mechanism in comparison with ordinary Geneva one.