The apparatus 1, further comprising {HEAD ~ a lever} pivotably coupled to {TAIL ~ the cam member} 
pivotably coupled to
The apparatus 1 , further comprising { HEAD ~ a lever } pivotably coupled to { TAIL ~ the cam member }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL