Apparatus and method for testing a geophone during assembly
US4448057A · kind A · utility
2Cited by
7References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 21, 1982 |
| Grant date | May 15, 1984 |
| Priority date | — |
| Expiry date | May 21, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V13/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for testing a geophone during assembly is disclosed. The apparatus includes a light source cooperating with a photocell for generating a voltage signal in response to light. A member for support of the geophone to be tested is located in a defined path between the light source and the photocell for generating a voltage signal. The apparatus further includes a display unit for indicating the voltage signal generated, which is representative of the resilient characteristics of the geophone springs, characterizing the position of the geophone coil and its resonant frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.