{HEAD ~ A folding stairway} interconnected with a basement window and its lock, for unlocking the window and opening the window when the stairs are pivoted from a closed or folded position to {TAIL ~ a down, usable position} 
{ HEAD ~ A folding stairway } interconnected with a basement window and its lock , for unlocking the window and opening the window when the stairs are pivoted from a closed or folded position to { TAIL ~ a down , usable position }
HEAD 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 OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL