As the eccentric discs rotate in one direction, for example clockwise as indicated by the arrow shown on the discs 213 shown in FIG 9, the gears 218 which are in {HEAD ~ constant mesh} with {TAIL ~ the internal gear} 216 are caused to rotate counterclockwise, and the counterclockwise rotation of the gear 216 rotates the gear 212 clockwise 
As the eccentric discs rotate in one direction , for example clockwise as indicated by the arrow shown on the discs 213 shown in FIG 9 , the gears 218 which are in { HEAD ~ constant mesh } with { TAIL ~ the internal gear } 216 are caused to rotate counterclockwise , and the counterclockwise rotation of the gear 216 rotates the gear 212 clockwise
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