Detector Vertical Oscillator Inside

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Item Detector Vertical Oscillator Inside
Item code
Description Replaced P 1
Manufacturer Petty Geophysical
Circa 1928
Donor Petty Collection
Location The University of Texas at Austin
Serial number
Taxonomy GSHP008

Prototype vertical component seismograph detector, (GSHP008)made in 1925 by O. S. and Dabney E. Petty, assisted by Edwina H. Petty: Displacement sensitive (condenser plate type) SENSITIVITY adjustable, practically unlimited; AIR DAMPING adjustable to any desired degree NATURAL PERIOD; of steady mass adjustable FRICTION; practically none CAPABILITY: Recording vertical component of wave motion in true known amplitude