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 {TAIL ~ constant mesh} with the internal gear 216 are caused to rotate {HEAD ~ 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 { TAIL ~ constant mesh } with the internal gear 216 are caused to rotate { HEAD ~ counterclockwise } , and the counterclockwise rotation of the gear 216 rotates the gear 212 clockwise
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