Each of the eccentrics is encompassed by a power transmission ring and a pair of {TAIL ~ parallel cranks} are journaled on opposite sides of each transmission ring by a crankpin extending through the transmission ring parallel to {HEAD ~ the power shaft} 
Each of the eccentrics is encompassed by a power transmission ring and a pair of { TAIL ~ parallel cranks } are journaled on opposite sides of each transmission ring by a crankpin extending through the transmission ring parallel to { HEAD ~ the power shaft }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL 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