| 摘要 |
<p>A security window having bars extending between one set of parallel sash members. Apertured plates extend between the other set of parallel sash members and the bars pass through the apertures in the plates. A frame of U-shaped channels is attached to three sides of the window opening and slidably receives the security window. An open channel member attached to the fourth side of the window opening permits the security window to slide therethrough and has a slot cooperating with a bar to lock the security window in place.</p> |
