The spring of the clutch 68 may then be manually retensioned by {HEAD ~ suitable means} which extends to {TAIL ~ the exterior} of the apparatus 10 
The spring of the clutch 68 may then be manually retensioned by { HEAD ~ suitable means } which extends to { TAIL ~ the exterior } of the apparatus 10
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