b) closing means for urging said door between said first open position ad second closed position having a housing and comprising a cable having one end fixed securely to the frame containing said door and the other end of said cable fixed securely to {HEAD ~ a rotating reel} contained in said housing, said cable wound about {TAIL ~ periphery} of said reel 
b ) closing means for urging said door between said first open position ad second closed position having a housing and comprising a cable having one end fixed securely to the frame containing said door and the other end of said cable fixed securely to { HEAD ~ a rotating reel } contained in said housing , said cable wound about { TAIL ~ periphery } of said reel
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH