The pair of leg means are pivotally mounted to the top and to {HEAD ~ a secondary member} located vertically downwardly from {TAIL ~ the pivotal connection} to the top 
The pair of leg means are pivotally mounted to the top and to { HEAD ~ a secondary member } located vertically downwardly from { TAIL ~ the pivotal connection } to the top
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH