Earthquake alarm system

Details Earthquake alarm system Earthquake alarm system

1980-03-05

1981-10-27

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

200 6149, 200 6151, 340669, 340689, G08B 2100

Patent

active

042976901

ABSTRACT:
An earthquake alarm system detects lateral impulse movements of a building or other structure and generates an audible sound as a result of the lateral detector moving beyond a preset limit. The lateral detector comprises a solid inertial mass that detects the lateral movement of the support as the measure of an impending earthquake. Electrical contacts associated with the mass and the support energize an audible circuit for generating an alarm to the occupants of the structure.

REFERENCES:
patent: 893997 (1908-07-01), Haas et al.
patent: 2311637 (1943-02-01), Buchanan
patent: 3896426 (1975-07-01), Laurent
patent: 3962693 (1976-03-01), Schamblin

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