EOST Jardin des Sciences
Université de Strasbourg
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4 - Vicentini



Made in 1895 and 1899 in Padua (Italy). They were in use in Strasbourg until 1907.

This is a complete system for recording the earth's movement: one seismometer to record two horizontal components, and another to record the vertical component:

  • vertical: consists of an undamped flexible blade
    mass 50kg (1100lb)
    period 1-2s
  • horizontal: consists of an elementary pendulum
    mass 100kg (2200lb)
    period 2s
  • no damping
  • direct mechanical recording on smoked paper.



Vincentini détail

These simple machines are not very sensitive. They were intended to record strong movements from local earthquakes.

The horizontal Vicentini is made of an elementary pendulum: a mass of 100kg (220lb) at one end of a rod. The horizontal oscillation of the mass is decomposed into two movements directed North-South and East-West respectively. They are undamped. The recording system has unfortunately been lost. It was located under the mass and gave a helicoidal recording of the two horizontal components and of one component to mark the time. This was on carbon-covered paper.

At the end of the last century, two tendencies developed simultaneously: seismographs of small masses, notably in the work of Von Reuber-Paschwitz, which involves an optical recording without friction, and in Italy different models of seismographs, where the stationary mass plays an important role and allows for mechanical recordings.

Vincentini dessin