FR2238913A1 - Measurement of circumference of spectacle lenses - involves rotating lens while roller tracks edge - Google Patents
Measurement of circumference of spectacle lenses - involves rotating lens while roller tracks edgeInfo
- Publication number
- FR2238913A1 FR2238913A1 FR7326869A FR7326869A FR2238913A1 FR 2238913 A1 FR2238913 A1 FR 2238913A1 FR 7326869 A FR7326869 A FR 7326869A FR 7326869 A FR7326869 A FR 7326869A FR 2238913 A1 FR2238913 A1 FR 2238913A1
- Authority
- FR
- France
- Prior art keywords
- lens
- circumference
- frame
- measurement
- spectacle lenses
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/12—Measuring wheels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Eyeglasses (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The circumference of a spectacle lens is measured by placing the lens between two spring loaded soft pads (34), contacting its edge with graduated dru m (58) and rotating the lens through exactly 360 deg. The revolution is defined by the driving handle (37) which is arranged to closely lock into a groove (44) on the frame. The drum is spring-loaded to lie either against a lens or against the collar (23). A spectacle frame is mounted between pillars with grooves, two pillars underneath (3, 4) and one above (11) each pillar being adjustable in height above the base. A button on the cranked end of an axle (21) is rotated around inside the frame and the drum is said to indicate the perimeter. The axle (21) is slidable axially to allow for a non-planar frame.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7326869A FR2238913A1 (en) | 1973-07-23 | 1973-07-23 | Measurement of circumference of spectacle lenses - involves rotating lens while roller tracks edge |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7326869A FR2238913A1 (en) | 1973-07-23 | 1973-07-23 | Measurement of circumference of spectacle lenses - involves rotating lens while roller tracks edge |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2238913A1 true FR2238913A1 (en) | 1975-02-21 |
FR2238913B3 FR2238913B3 (en) | 1976-07-09 |
Family
ID=9122964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7326869A Granted FR2238913A1 (en) | 1973-07-23 | 1973-07-23 | Measurement of circumference of spectacle lenses - involves rotating lens while roller tracks edge |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2238913A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3091331A1 (en) * | 2015-05-08 | 2016-11-09 | SICK STEGMANN GmbH | Measuring device for measuring a path and/or a speed and method for mounting the same |
EP3091330A1 (en) * | 2015-05-08 | 2016-11-09 | SICK STEGMANN GmbH | Measuring device for measuring a path and/or a speed |
-
1973
- 1973-07-23 FR FR7326869A patent/FR2238913A1/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3091331A1 (en) * | 2015-05-08 | 2016-11-09 | SICK STEGMANN GmbH | Measuring device for measuring a path and/or a speed and method for mounting the same |
EP3091330A1 (en) * | 2015-05-08 | 2016-11-09 | SICK STEGMANN GmbH | Measuring device for measuring a path and/or a speed |
Also Published As
Publication number | Publication date |
---|---|
FR2238913B3 (en) | 1976-07-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |