Hole center detecting apparatus, straightness measuring apparatus, and residual torsion measuring apparatus
US7013573B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2003 |
| Grant date | Mar 21, 2006 |
| Priority date | — |
| Expiry date | Apr 28, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A hole center detecting apparatus for positioning the hole of a spool and a cord accurately by determining the coordinates of two points of intersection between the inner circumference of the spool hole and a virtual straight line to compute the coordinates of the center of the hole and by moving the cord according to the computed coordinates of the hole center. A straightness measuring apparatus for measuring the curvature of a cord automatically by detecting the coordinates of three longitudinal points of the cord. A measurement apparatus for measuring a residual torsion automatically by measuring the rotation angle of the end portion of the cord before and after clamped, electrically.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.