SEISMOGRAPH Russian patent published in 2004 - IPC

FIELD: measurement technology, facilities recording vertical and horizontal vibrations of ground generated by seismic waves caused by sources of natural and artificial origin. SUBSTANCE: given seismograph incorporates liquid, for example, mercury, in the capacity of inert mass confined in vessel showing form of two tetrahedral prisms with equal orthogonal diagonals turned with bases to one another with three taps connecting corresponding opposite angles of vessel. Level of liquid in each tap is located above vessel. Converters of level of liquid are placed across each tap. EFFECT: raised sensitivity and gain factor of vibrations. 1 dwg