This lateral shifting of {TAIL ~ the fork} 51 and its motor 52 by eccentric 58 is guided by a roller 60 secured to {HEAD ~ a link} 61 carried by the fork 51 and motor 52 assembly 
This lateral shifting of { TAIL ~ the fork } 51 and its motor 52 by eccentric 58 is guided by a roller 60 secured to { HEAD ~ a link } 61 carried by the fork 51 and motor 52 assembly
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH