Passive non-energized earthquake detector

Details Passive non-energized earthquake detector Passive non-energized earthquake detector

1997-01-16

1998-06-09

Swarthout, Brent A.

Communications: electrical

Condition responsive indicating system

Specific condition

3403921, 3403924, G08B 2100

Patent

active

057641544

ABSTRACT:
An earthquake alarm that does not require batteries or other external power supply that supplies an audio alert with sound waves that can be detected by a human being, particularly useful in a bedroom to awaken a human being to notify them of an earthquake, comprising a plurality of sound-generating members, mechanically disposed extremely close together (at least within one-half inch of each other) and tethered from a frame that is supported from the ceiling so that upon vibration of the ceiling, the sound-generating members will be vibrated and bump into each other, causing a large amount of sound, which can readily wake someone up. In order to prevent inadvertent alarm signals because of wind currents, a wind deflector or shield is placed around the device to prevent wind from striking the device.

REFERENCES:
patent: 4945347 (1990-07-01), Perry
patent: 5072208 (1991-12-01), Christensen
patent: 5252786 (1993-10-01), Rinard
patent: 5587697 (1996-12-01), Rent

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