GB337985A - Apparatus for determining whether there be any strain in a spectacle lens when mounted in its frame or rimless clip - Google Patents
Apparatus for determining whether there be any strain in a spectacle lens when mounted in its frame or rimless clipInfo
- Publication number
- GB337985A GB337985A GB3445629A GB3445629A GB337985A GB 337985 A GB337985 A GB 337985A GB 3445629 A GB3445629 A GB 3445629A GB 3445629 A GB3445629 A GB 3445629A GB 337985 A GB337985 A GB 337985A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strain
- rimless
- clip
- frame
- determining whether
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/241—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet by photoelastic stress analysis
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
- Eyeglasses (AREA)
Abstract
337,985. Bateman, F. W., and Bateman & Co., Ltd., F. Nov. 12, 1929. Polarizing-apparatus. - Strain in spectacle lenses is detected by examination of the lenses in polarized light. Light from a frosted electric globe is reflected from a polished black surface A being polarized thereby, and received in an analysing eyepiece K mounted on a support a. The lens to be examined is held between the eyepiece K and the plate A revealing white streaks in the parts strained. The plate A may be pivoted as shown to a wall bracket D so that it may be turned out of the way when not in use.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3445629A GB337985A (en) | 1929-11-12 | 1929-11-12 | Apparatus for determining whether there be any strain in a spectacle lens when mounted in its frame or rimless clip |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3445629A GB337985A (en) | 1929-11-12 | 1929-11-12 | Apparatus for determining whether there be any strain in a spectacle lens when mounted in its frame or rimless clip |
Publications (1)
Publication Number | Publication Date |
---|---|
GB337985A true GB337985A (en) | 1930-11-13 |
Family
ID=10365867
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3445629A Expired GB337985A (en) | 1929-11-12 | 1929-11-12 | Apparatus for determining whether there be any strain in a spectacle lens when mounted in its frame or rimless clip |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB337985A (en) |
-
1929
- 1929-11-12 GB GB3445629A patent/GB337985A/en not_active Expired
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