The first set of peripheral teeth and the second set of peripheral teeth are each at a common radius from {HEAD ~ the common pivot} point on {TAIL ~ opposite sides} of the transfer gear 
point on
The first set of peripheral teeth and the second set of peripheral teeth are each at a common radius from { HEAD ~ the common pivot } point on { TAIL ~ opposite sides } of the transfer gear
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH