The device 4, characterized by {TAIL ~ the fact} that {HEAD ~ the lever} is in a position which covers the control end of the adjusting screw when the sliding element is in the position in which it engages the coupling means 
The device 4 , characterized by { TAIL ~ the fact } that { HEAD ~ the lever } is in a position which covers the control end of the adjusting screw when the sliding element is in the position in which it engages the coupling means
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH