| 摘要 |
A security system comprising an attachment ( 1 ) for mounting on a wall top, having a first part ( 4 ) that is fixable to the wall and a second part ( 6 ) that is mounted for relative movement on said first part upon the application of a force thereto whereby movement of the second part generates a signal to activate a visual and/or audible alarm, the second part having at least one pair of opposing members ( 40 a , 40 b) for partially overlapping a side of the first part so as to retain the second part, the second part being sized so as to allow a limited range of movement with respect to said first part without its release therefrom.
|
