| 摘要 |
<p>Security stick implemented with no. 2 cylindrical tubular or metallic square tiles. The first tube is connected through a junction to a stirrup, anchored to the wall. The second tube is sliding inside the first one and can be regulated in its length through a threaded bar according to the distance between the wall and the door or smaller door. The second tube is pushed by a cylindrical compressed spring that can be of various consistence allowing the opening of a panel of the smaller door, of a space sufficient to control the external of the same; in case of an awkward external thrust, the pole permits, through the compression of the spring, the closure of the door.</p> |
