Measurement method and device for facilitating the mounting of corrective glasses on a spectacle frame
US4531297A · kind A · utility
7Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1983 |
| Grant date | Jul 30, 1985 |
| Priority date | — |
| Expiry date | Oct 27, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B3/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measurement device for the mounting of corrective glasses on a spectacle frame. The device has a transparent support for plate 4, the upper part 6 of which is opaque and is provided with a slot 5 acting as an origin for horizontal graduations 4a which are used for the measurement. The device is used for the determination of the height H separating the center of the pupil of the eye from the lowest part 3 of the interior of the spectacle frame circle 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.