EARTHQUAKE DETECTOR

摘要

An earthquake detector (1) includes an electrical circuit (61) which is connected in a manner to allow operation of the earthquake detector (1) in an "activated" mode where the lamp (5) and the audio alarm (6) are operated upon detecting movement of the surface by the sensor (3) or in a "light" mode where only the lamp (5) is operated. The electrical circuit (61) is also connected in a manner to allow operation of the earthquake detector (1) in a "distress signal" mode where only the audio alarm (6) is operated. The earthquake detector (1) may also include an adjustable mounting bracket (71) for removability and mounting the earthquake detector (1) on a vertical surface. The sensor (3) may include an electrically conductive conical section (21) and a weighted pendulum (23) attached to an upper surface (27) of the detector (1) by an electrically conductive spring (29) to allow lateral and vertical movement of the weighted pendulum (23) within the conical section (21). The weighted pendulum (23) may include an electrically conductive portion (41) which is electrically connected to the electrically conductive spring such that movement of the pendulum a predetermined distance causes the electrically conductive portion (41) to contact the conical section (21) thereby triggering the operation of the lamp (5) and the audio alarm (6). The earthquake detector (1) also includes a sensitivity adjustment dial (13).