Single Tooth Involute gear - Educational model

My Educational Mechanical Examples SeriesThis model is one of my educational mechanical mechanism examples on 80mm x 80mm base plates.You can find all models of the series in this collection => [Mechanical Mechanism Examples]This modelThis model shows three single-tooth involute gears meshing in two different ways. Note that the two gears on the both ends rotate in opposite direction. Brief descriptionAll three gears in this model are made of three heart-shaped plates stacked together with 120-degree phase differences. Each heart shape represents a single-tooth involute gear. A single plate alone cannot maintain continuous meshing, so by stacking three plates with shifted angles, we keep at least one plate always in contact with the mating gear. If you look closely, the lower-left and upper-right gears have different stacking orders. The upper-right gear has the same order as the center gear, while the lower-left gear has the reverse order. The center and lower-left gears mesh like ord