| 摘要 |
A window having a fixed sash which can be easily removed and replaced for cleaning the transparent windowpane or for replacement of the windowpane in the event of breakage. The fixed sash of the window is usually associated with the upper portion of a window frame with a movable bottom vent being mounted in the window frame for vertical movement between a lowered closed position and a raised open position with a latch mechanism securing the movable vent in closed position. The window frame which receives the fixed upper sash and the movable lower or bottom vent is secured to an opening in a building wall in the conventional manner of prime windows and may be in the form of vertical and horizontal frame components constructed of extruded aluminum structural members with a centrally located meeting rail also constructed of an extruded aluminum rail rigidly fixed together in a manner to form a window frame with the fixed sash and movable vent being mounted in the frame in a manner that the movable vent can be moved to an upper position and removed from the frame with the fixed sash including unique retaining devices along the side and top rails to securely retain the frame of the fixed sash in the window frame but yet enable simple and easy removal thereof without requiring the use of special tools and without requiring any modification of the window frame.
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