Apparatus for and methods of seismic prospecting
US4006445A · kind A · utility
4Cited by
2References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 3, 1975 |
| Grant date | Feb 1, 1977 |
| Priority date | — |
| Expiry date | Nov 3, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In seismic prospecting a local response is achieved by striking a hammer on the ground, and the recording apparatus is arranged to be triggered by the hammer to run from a short time before the impulse to a predetermined time after it. The impulse is recorded into one channel and the reflections into another, and the latter are slowed down by successive recordings to a speed where they can be mechanically plotted. The impulse signal in the other channel is used as a timing and control signal for the re-recording and playbacks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.