| 摘要 |
An improved tamper-proof window unit comprising similar first and second quadrilateral centrally open frame members adapted to be mounted about an opening respectively on opposite sides of a door. Each frame member has a narrow elongated quadrilateral front panel extending generally in a plane parallel to the door and marginally about the door opening with an outer edge portion partially overlapping the door adjacent the opening. A small countersunk front-to-rear screw hole is provided on each side of the front panel to communicate with the door opening. A narrow elongated quadrilateral and generally L-shaped integral flange extends along the front panel with each L-shaped flange comprising first and second panels. The first panel of each flange projects generally rearwardly and the second panel projects from the rear edge of the first panel outwardly with respect to the door opening. The second panels of opposite frame members are spaced to receive and hold edge portions of a pane of glass when screws are entered in the front panel openings and engaged with said panels to assemble the frame. Spring clips mounted on the second panels temporarily retain one frame member in the door opening, locate the frame relative to the opening, and locate the pane of glass relative to the frame and door opening.
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