{HEAD ~ A link} pivoted to the yoke has one end portion contacted by the shaft and {TAIL ~ the other end} is in contact with one end of a spring biased pin  
has
{ HEAD ~ A link } pivoted to the yoke has one end portion contacted by the shaft and { TAIL ~ the other end } is in contact with one end of a spring biased pin
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH