Alarming seismometer

Details Alarming seismometer Alarming seismometer

1979-10-31

1982-12-14

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

73654, 181122, 340540, 340669, G08B 2100

Patent

active

043640338

ABSTRACT:
A small-sized, high sensitivity seismograph comprising a first seismometer for detecting left-right ground motions, a second seismometer for detecting up-down ground motions, two sets of protective device for preventing the seismographic detectors from damage due to excessive motions, an alarm system, and an adjustable device for adjusting the sensitivity of the alarm system. All of the above-described devices are provided in a case.

REFERENCES:
patent: 3813505 (1974-05-01), Shoji
patent: 4124841 (1978-11-01), Kettunen

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