GB688333A - Improvements in or relating to watch-glasses - Google Patents
Improvements in or relating to watch-glassesInfo
- Publication number
- GB688333A GB688333A GB2945350A GB2945350A GB688333A GB 688333 A GB688333 A GB 688333A GB 2945350 A GB2945350 A GB 2945350A GB 2945350 A GB2945350 A GB 2945350A GB 688333 A GB688333 A GB 688333A
- Authority
- GB
- United Kingdom
- Prior art keywords
- central portion
- flange
- watch
- outwardly
- peripheral wall
- 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
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses
- G04B39/004—Watch crystals; Fastening or sealing of crystals; Clock glasses from a material other than glass
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Electric Clocks (AREA)
Abstract
688,333. Watches. SAUNDERS, E. L. Nov. 14, 1951 [Dec. 1, 1950]. No. 29453/50. Class 139. A watch glass has a concave central portion 2, Fig. 2; a peripheral wall 1 curved upwardly and inwardly towards the central portion in convex manner, and an outwardly-extending reduced flange 3 at the lower part of the peripheral wall, the whole being made of resilient material such as to permit deformation of the central portion into a convex shape, Fig. 3, for sufficient reduction of the diameter of the outwardly-extending flange to allow its introduction into a watch rim recess 4 of smaller diameter than the flange before reduction, and such that upon removal of the deforming force from the central portion it tends to revert to its concave shape and thereby cause the flange to expand and be forcibly urged into the watch rim recess to form a tight seal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2945350A GB688333A (en) | 1950-12-01 | 1950-12-01 | Improvements in or relating to watch-glasses |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2945350A GB688333A (en) | 1950-12-01 | 1950-12-01 | Improvements in or relating to watch-glasses |
Publications (1)
Publication Number | Publication Date |
---|---|
GB688333A true GB688333A (en) | 1953-03-04 |
Family
ID=10291793
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2945350A Expired GB688333A (en) | 1950-12-01 | 1950-12-01 | Improvements in or relating to watch-glasses |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB688333A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101488006B (en) * | 2008-05-13 | 2012-07-11 | 张和国 | Four-side arch-shaped glass and preparation method and use thereof |
-
1950
- 1950-12-01 GB GB2945350A patent/GB688333A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101488006B (en) * | 2008-05-13 | 2012-07-11 | 张和国 | Four-side arch-shaped glass and preparation method and use thereof |
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