| 摘要 |
A window assembly comprises a fixed rectangular open frame and a movable vent comprising two rectangular vent frames 12, 14, one above the other and hingedly connected together along their adjacent edges. Parts of each vent frame remote from the hinge 16 are mounted, by pivoting stays 20, 22, between opposite side frame members 18 of the fixed frame, and the stays are also designed to allow up and down movement of the edges of the vent frames. This allows the vent frames to be moved from a closed position, where they lie flat and one above the other within the fixed frame, to an open position where the vent frames extend in a V-formation with the hinge connection 16 displaced out of the general plane of the fixed frame. The arrangement allows the outer surfaces of the window to be cleaned from inside the building without creating a large enough opening for a child to fall through. <IMAGE> |
