Movable device for generating acoustic shear waves in the earth
US4050540A · kind A · utility
18Cited by
6References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1975 |
| Grant date | Sep 27, 1977 |
| Priority date | — |
| Expiry date | Jun 24, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S181/401
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Device for generating shear waves in the earth for seismic prospecting, comprising means for striking with a mass a target-member coupled to the earth, said means including means for lifting and shifting said mass with respect to the target member, an electromagnet for intermittently locking it in an upper position and releasing it abruptly and means for adjusting the stroke of the mass from its upper position to its lower position where it impinges the target member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.