| 摘要 |
<p>The striking plate has two metal pieces connected with a separating elastic mass, such that the former piece serves for receiving the lock bolt and the latter piece serves for fixing the striking plate to the door frame. The former piece is fixed buoyant to the door frame, and the latter piece is directly fixed to the door frame. The elastic mass is effected during a strong pressing pressure of the pieces against each other to an extent that the pieces come into direct contact that is applied for closure of a circuit, which serves as an impulse generator for an alarm system.</p> |
