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