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