| 摘要 |
An removable frame assembly for building apertures that can be readily pushed out by a user in an emergency situations. It includes a fixed frame rigidly mounted to the aperture and a second frame removably mounted to the fixed frame. The removable frame rigidly houses the window for the aperture and, optionally, security bars to prevent trespassers from entering through the window. The security bars can be installed inside or outside the building. A relatively remotely located locking mechanism releasably keeps the fixed and removable frames together. A spring member sandwiched between the fixed and removable frame members urge the separation of the two when the locking mechanism releases them.
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