Method and apparatus for measuring irregularities in the cross-section of yarns, roving, bands and the like
US4051722A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1977 |
| Grant date | Oct 4, 1977 |
| Priority date | — |
| Expiry date | Feb 22, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/365
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of, and apparatus for, measuring irregularities in the cross-section of yarns, rovings, bands and the like, by means of a preferably portable measuring apparatus or device providing a direct read-out or display and containing a measuring element, amplifying- and signal converting circuitry as well as an indicator or display device. A measuring signal derived from a yarn irregularity signal is checked with respect to the number of times it passes through at least one given reference value or hysteresis range, and the indicated value for the irregularity constitutes a statistically certain or significant value whenever the number of passes through the reference value or hysteresis range has reached at least a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.