NL12864C - - Google Patents
Info
- Publication number
- NL12864C NL12864C NL21688A NL21688A NL12864C NL 12864 C NL12864 C NL 12864C NL 21688 A NL21688 A NL 21688A NL 21688 A NL21688 A NL 21688A NL 12864 C NL12864 C NL 12864C
- Authority
- NL
- Netherlands
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
- B24B13/02—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor by means of tools with abrading surfaces corresponding in shape with the lenses to be made
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB33651/20A GB177575A (en) | 1920-11-29 | 1920-11-29 | Improvements in and relating to lens working and like machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL12864C true NL12864C (fr) | 1925-05-15 |
Family
ID=33443857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL21688A NL12864C (fr) | 1920-11-29 | 1922-03-22 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1490009A (fr) |
| FR (1) | FR545166A (fr) |
| GB (1) | GB177575A (fr) |
| NL (1) | NL12864C (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4534137A (en) * | 1982-08-02 | 1985-08-13 | Sarofeen George M J | Method for pattern generation and surfacing of optical elements |
-
1920
- 1920-11-29 GB GB33651/20A patent/GB177575A/en not_active Expired
-
1921
- 1921-11-23 US US517271A patent/US1490009A/en not_active Expired - Lifetime
- 1921-11-25 FR FR545166A patent/FR545166A/fr not_active Expired
-
1922
- 1922-03-22 NL NL21688A patent/NL12864C/xx active
Also Published As
| Publication number | Publication date |
|---|---|
| US1490009A (en) | 1924-04-08 |
| FR545166A (fr) | 1922-10-06 |
| GB177575A (en) | 1922-03-29 |