a slot extending from surface portions of {HEAD ~ said lever member} into said passageway and between said {TAIL ~ first and second openings}, 
a slot extending from surface portions of { HEAD ~ said lever member } into said passageway and between said { TAIL ~ first and second openings } ,
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH