Testing glass fibres
US4346601A · kind A · utility
65Cited by
2References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 18, 1980 |
| Grant date | Aug 31, 1982 |
| Priority date | — |
| Expiry date | Aug 18, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/028
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of proof testing an optical glass fibre by pulling it around a free roller whose radius is sufficiently small to impart the strain necessary to detect fibres whose surface or near surface flaws weaken the fibre below a required strength. Proof testers are disclosed incorporating, single rollers, a set of three parallel rollers and a jig holding four sets of three rollers. Proof testers incorporating the extra rollers whose axes are at different angles are shown to more thoroughly explore the surface of the fibre for cracks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.