Peak accelerograph

Details Peak accelerograph Peak accelerograph

1985-07-24

1986-12-23

Levy, Stewart J.

Measuring and testing

Vibration

Sensing apparatus

346 7, 346 44, 346139C, G01D 1502

Patent

active

046304835

ABSTRACT:
A three-axis scratch-recording accelerograph of the type installed in large structures to record peak magnitudes of earthquake or like motion. Hard styli coupled to seismometer elements scratch or engrave record lines on small stationary metallic record plates, which are suitably coated. No standby power is required and the records are resistant to heat, liquids, and mechanical damage. The instrument embodies various improvements over that in my prior U.S. Pat. No. 3,974,504 respecting the reed spring suspension of the proof mass; transit clamping; the magnifying lever system; and electrical status indication.

REFERENCES:
patent: 2393069 (1946-01-01), Rushing et al.
patent: 3427635 (1969-02-01), Siegelman et al.
patent: 3974504 (1976-08-01), Engdahl
patent: 4223319 (1980-09-01), Engdahl

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