| 摘要 |
An alarm device for mounting on vehicles comprising a switch and a plunger biased away from the switch, and an arm having the configuration of a backward S with the arm being pivotally mounted adjacent to the window of the vehicle, and the upper portion of the arm operatively engaged with the plunger and a lower portion being in abutting relationship with the window whereby the arm maintains the plunger in a depressed position when the window is closed and which is caused to pivot toward the window to release the plunger when the window is displaced from a closed position. |
