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