| 摘要 |
An earthquake detector including a sensor, a lamp, an audio alarm, a switch, a power source and an electrical circuit. The electrical circuit connects these components in a manner to allow operation of the earthquake detector in an "activated" mode where the lamp and the audio alarm is operated upon detecting movement of the surface by the sensor or in a "light" mode where only the lamp is operated. The electrical circuit may also connect these components in a manner to allow operation of the earthquake detector in a "distress signal" mode where only the audio alarm is operated. The earthquake detector may also include an adjustable mounting bracket for removability and mounting the earthquake detector on a vertical surface. The sensor may include an electrically conductive conical section and a weighted pendulum attached to an upper surface of the detector by an electrically conductive spring to allow lateral and vertical movement of the weighted pendulum within the conical section. The weighted pendulum may include an electrically conductive portion which is electrically connected to the electrically conductive spring such that movement of the pendulum a predetermined distance causes the electrically conductive portion to contact the conical section thereby triggering the operation of the lamp and the audio alarm. A sensitivity adjustment dial may be provided for adjusting the predetermined distance between the weighted pendulum and the conical section by adjusting a height position of the pendulum. |
