Method of measuring variation in the elongation of a very long magnetizable element of small transverse dimensions, and apparatus for implementing the method
US4782294A · kind A · utility
2Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1987 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Feb 20, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4489
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of measuring variation in the elongation of a very long element of small transverse dimensions and made of magnetizable material, optionally covered by non-magnetic material, and running between a lower elongation zone and a higher elongation zone, or vice versa, said method consisting in periodically magnetically marking the elongate element simultaneously at two points spaced apart by a predetermined distance therealong in a first one of said zones, and then in detecting the instants at which said magnetic marks pass at least one point situated in the other one of said zones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.