A spring is disposed interior of the channel and between {HEAD ~ the assembled pivot stump} and {TAIL ~ housing} 
A spring is disposed interior of the channel and between { HEAD ~ the assembled pivot stump } and { TAIL ~ housing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL