Seismic detector
US4599713A · kind A · utility
19Cited by
12References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1984 |
| Grant date | Jul 8, 1986 |
| Priority date | — |
| Expiry date | Mar 9, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/164
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A seismic detector comprises a casing the lower part (10) of which is provided with a plurality of apertures (19). A hydrophone transducer (70) comprising an annular ceramic member provided with metallized surfaces (71,72) is mounted in the casing and defines with the casing an enclosure (65) which houses a geophone (60). The outer face (71) of the hydrophone transducer (70) is subject to the ambient hydrostatic pressure via the apertures (19). The bottom of the casing is provided with a protuberance (11) to which a spike (12) is attached. The seismic detector can work in both hydrophonic and geophonic modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.