Earthquake motion detector alarm

Details Earthquake motion detector alarm Earthquake motion detector alarm

1994-03-21

1995-05-23

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

200 6145R, 200 6151, 340669, G08B 2100

Patent

active

054185238

ABSTRACT:
The Earthquake Motion Detector Alarm consists of a pendulum hanging within a sensor ring. At the instant of earth movement, the pendulum weight will make contact with the sensor ring setting off an audio alarm and floodlamp. The magnetized sensor ring can be adjusted so the detector can be installed to function on all vertical walls by positioning the pendulum weight within the ring.

REFERENCES:
patent: 3359550 (1967-12-01), Christensen
patent: 4297690 (1981-10-01), Baker
patent: 4432041 (1984-02-01), Pfisterer et al.
patent: 4789922 (1988-12-01), Cheshire
patent: 4797661 (1989-01-01), Wiley

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