Each of the crankpins 224 will describe a separate circle, and {TAIL ~ the center} of the ring 215 which coincides with the center of the eccentric disc 213 travels in {HEAD ~ a circular path} about the axis of the shaft 211 
Each of the crankpins 224 will describe a separate circle , and { TAIL ~ the center } of the ring 215 which coincides with the center of the eccentric disc 213 travels in { HEAD ~ a circular path } about the axis of the shaft 211
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH