| 摘要 |
A pivotal and sliding window having a top and bottom rail guide supports 13, 15 attached to a panel 14 via hinge pins (16, 18, fig.1); the guide supports 13, 15, mounted for sliding within tracks, guides or rails 22 in the frame. At least one of the support guides is movable axially, e.g. upward, along the hinge pin relative to the sash panel to allow the sash panel to pivot about the hinge pin. The sash panel and opposing supports may have complementary convex and concave engaging surfaces 27, 29, to retain the panel parallel to the tracks of the frame. The axially displaceable support 13 may be spring biased into engagement with the panel. A lifting mechanism may vertically displace the rotatable panel 14 to disengage the surfaces 27, 29 connecting the sash panel and bottom rail guide support 15 and allow the rotatable panel 14 to rotate. |
