42 each have a second end 57 and fig4 shows the second end 57 of the first elongate element 41 the second end 57 is also shown in its stored position in the recess 32 the second end 57 is coupled to the last or bottom rung 43 which is a part of the escape ladder 36 fig4 further shows the sill part 23 in the closed position secured to the upward facing surface of the sill part 23 is a seal element 61 which extends the full length of the sill part 23 an alternate embodiment of the present invention is shown in fig5 which is a sectional side view of the window frame 21 in this embodiment the hinged sill part 23 is replaced with a sill part 71 the sill part 71 is not coupled to any part of the window frame 21 the sill part 71 includes a downward projection 73 the projection 73 has dimensions slightly less than those of the opening 31 so that the projection 73 can approximately fill the opening 31 the projection 73 approximately fills the opening in order to substantially prevent horizontal movement of the sill part 71 relative to the window frame 21 the projection 73 of the sill part 71 is coupled to the second ends 57 of the first and second elongate elements 41 and 42 thus in this embodiment the sill part 71 also serves as the bottom rung 43 of.