Calibration gage for calibrating a device for reading off eyeglass frame contours, and corresponding calibration method
US5802731A · kind A · utility
8Cited by
9References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1996 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Jun 24, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B3/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A calibration gage for calibrating a device for reading off the contours of eyeglass frames is designed to be fitted to the contour reading off device to be calibrated in place of an eyeglass frame. It includes a plate with at least two ribs projecting from it. The ribs are generally parallel to each other in a first direction and spaced from each other in a second direction. By reading off the known dimensions between their inside and outside flanks, it is possible to determine some parameters of the contour reading off device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.