| 摘要 |
The lock enables a door to be bolted simultaneously at the top and bottom by a single operating handle. A deadlock mechanism is incorporated operable by a conventional cylinder lock (31). In one arrangement the deadlock and the bolting mechanism can be operated from both sides of the door (10). The basic mechanism of the lock consists of an operating tangent plate (20) connected by pin and slot mechanism to a second tangent plate (24). Each tangent plate (20 , 24) is in turn connected by a pin and slot mechanism to a slider plate (21,28) and each slider plate (21,28) is connected to a bolt (16,17 respectively). The deadlock includes a slidable locking plate (44) moveable by a cam mechanism (32,32a) operated by a cylinder lock (31). |
