Patent ID: 6342842
Filing Date: 2002-01-29
Classification: G01V,G08B

Abstract:
An earthquake alarm device comprising:a housing, a vertical vibration detecting system, a horizontal vibration system, a battery and an alarm set; said vertical vibration detecting system including a first detecting set and a second detecting set; said first detecting set being composed of a non-conductive vertical vibration adjusting element, a wire with a non-conductive outer wrap, a spring holding seat, a detective spring, a detective element, and a weight; said second detective set being composed of a non-conductive horizontal vibration adjusting element, a hanging spring, a detecting tube top cover, a half-insulated steel tube having a non-conductive inner wall, and a vertical vibration detective seat; said vertical vibration detective seat being conductive; when an earthquake containing a vertical vibration, due to said weight, said detective spring being moving up and down so as to cause a vertically vibration, said detective spring being disposed inside and limited by the half-insulated steel tube and performing a vertical movement, so that said detective element of said first detecting set contacts with said vertical vibration detecting seat so as to form an electrical loop to activate a vertical alarm of the alarm set; by mean of an outer thread of said vertical vibration adjusting element, said first detecting set being engaged into a non-conductive inner thread of said horizontal vibration adjusting element of said second detecting set; and an outer thread of said horizontal vibration adjusting element being engaged into an inner thread of an upper end of a horizontal sliding ball so as to secure said first and second detecting sets; and said horizontal swinging detecting system including another detecting set which is composed of a fixed tube upper cover, a fixed tube and a horizontal detecting seat; said horizontal vibration detective seat being conductive; when said earthquake containing a horizontal vibration, due to said weight, said hanging spring being repeatedly horizontally swung so as to cause a horizontally vibration, so that said weight contacts with said horizontal vibration detecting seat so as to form an electrical loop to activate a horizontal alarm of the alarm set; wherein an outer thread of said fixing tube upper cover being engaged in an inner thread of a lower end of said horizontal sliding ball so that said sliding ball can be disposed on a horizontal sliding ball seat in said housing with free sliding.