| 摘要 |
A sliding window arrangement 10, including a window frame 13 defining a square or rectangular opening. First and second panes 11 and 12 are disposed within the window frame 13 for sliding movement within the window frame through offset vertical planes. The first and second panes 11 and 12 are connected to a counterweight arrangement 26 by a pulley arrangement 28. The counterweight arrangement 26 comprises a pair of weights that are disposed on opposite sides of the window frame 13 and that are movable vertically and which provided a balancing weight which is equal to the weight of the first and second panes 11 and 12. The sliding window arrangement 10 provides for first and second modes of sliding movement whereby the first mode of sliding movement comprises sliding movement of the first and second panes in equal and opposite directions, and whereby the second mode of sliding movement comprises independent sliding movement of the first and second panes relative to each other. In the first mode of sliding movement, the pair of weights is fixed against vertical movement and in the second mode of sliding movement, the pair of weights is movable vertically. <filename> |
