GB449398A - Improvements in the process of grinding curved surfaces, and apparatus therefor - Google Patents
Improvements in the process of grinding curved surfaces, and apparatus thereforInfo
- Publication number
- GB449398A GB449398A GB3670134A GB3670134A GB449398A GB 449398 A GB449398 A GB 449398A GB 3670134 A GB3670134 A GB 3670134A GB 3670134 A GB3670134 A GB 3670134A GB 449398 A GB449398 A GB 449398A
- Authority
- GB
- United Kingdom
- Prior art keywords
- axis
- curvature
- tool
- faces
- curved surfaces
- 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
-
- 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
- B24B13/0012—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor for multifocal lenses
Abstract
449,398. Grinding curved surfaces. MOORE, J. A., 20, Red Lion Street, Clerkenwell, London. Dec. 21, 1934, No. 36701. [Class 60] Two concentric sur faces of different radi of curvature, for example, the two spherical faces of a one piece bifocal lens, are ground simultaneously by a tool which is rotated about an axis c, d in contact with a work blank B carried by a holder C rotatec about an axis a, b. The tool has two grinding faces, namely, ar annular part - spherica face A<1>, the centre of curvature of which is at the intersection of the axes of rotation, and an inner face D<1> of conoidal form generated by rotating about the axis c, d a segment of a circle struck from the point o on the axis a, b, the point o being the centre of curvature of the inner surface to be ground. The tool is made of material not subject to appreciable wear, for example, copper loaded with diamond, or grindstone, &c.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3670134A GB449398A (en) | 1934-12-21 | 1934-12-21 | Improvements in the process of grinding curved surfaces, and apparatus therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3670134A GB449398A (en) | 1934-12-21 | 1934-12-21 | Improvements in the process of grinding curved surfaces, and apparatus therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB449398A true GB449398A (en) | 1936-06-22 |
Family
ID=10390467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3670134A Expired GB449398A (en) | 1934-12-21 | 1934-12-21 | Improvements in the process of grinding curved surfaces, and apparatus therefor |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB449398A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4584799A (en) * | 1983-03-31 | 1986-04-29 | Comadur Sa | Method of forming a convergent lens in a plate of transparent mineral material |
-
1934
- 1934-12-21 GB GB3670134A patent/GB449398A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4584799A (en) * | 1983-03-31 | 1986-04-29 | Comadur Sa | Method of forming a convergent lens in a plate of transparent mineral material |
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