GB428269A - Improvements in methods of and means for making multifocal lenses - Google Patents
Improvements in methods of and means for making multifocal lensesInfo
- Publication number
- GB428269A GB428269A GB2747234A GB2747234A GB428269A GB 428269 A GB428269 A GB 428269A GB 2747234 A GB2747234 A GB 2747234A GB 2747234 A GB2747234 A GB 2747234A GB 428269 A GB428269 A GB 428269A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- pieces
- block
- fuse together
- multifocal 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/20—Uniting glass pieces by fusing without substantial reshaping
- C03B23/22—Uniting glass lenses, e.g. forming bifocal lenses
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Eyeglasses (AREA)
Abstract
428,269. Glass manufacture. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.- (Bausch & Lomb Optical Co.; 635, St. Paul Street, Rochester, New York, U.S.A.) Sept. 25, 1934, No. 27472. [Class 56] A method of making composite discs of glass for multifocal lenses consists in assembling pieces of glass with their edges in contact, and then heating the assembly to such a temperature that the glasses fuse together. The method is intended particularly for the formation of a composite glass button which is afterwards ground and polished and is fused into a depression in a glass blank to form a multifocal spectacle lens, as described in Specification 428,270. For this purpose, two or more pieces of glass, 29, 30 are fitted snugly into a recess formed in a block 20 of refractory material. The assembled pieces are then covered with a refractory slab 27, inverted, and placed in a furnace. When the glass softens, the pieces fuse together and the block 20 prevents the glass from flowing and distorting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2747234A GB428269A (en) | 1934-09-25 | 1934-09-25 | Improvements in methods of and means for making multifocal lenses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2747234A GB428269A (en) | 1934-09-25 | 1934-09-25 | Improvements in methods of and means for making multifocal lenses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB428269A true GB428269A (en) | 1935-05-09 |
Family
ID=10260143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2747234A Expired GB428269A (en) | 1934-09-25 | 1934-09-25 | Improvements in methods of and means for making multifocal lenses |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB428269A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504657A (en) * | 2022-10-18 | 2022-12-23 | 上海毫米星光光学有限公司 | Method and system for preparing composite lens |
-
1934
- 1934-09-25 GB GB2747234A patent/GB428269A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504657A (en) * | 2022-10-18 | 2022-12-23 | 上海毫米星光光学有限公司 | Method and system for preparing composite lens |
| CN115504657B (en) * | 2022-10-18 | 2023-12-08 | 上海毫米星光光学有限公司 | A method and system for preparing composite lenses |
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