DE280432C - - Google Patents
Info
- Publication number
- DE280432C DE280432C DENDAT280432D DE280432DA DE280432C DE 280432 C DE280432 C DE 280432C DE NDAT280432 D DENDAT280432 D DE NDAT280432D DE 280432D A DE280432D A DE 280432DA DE 280432 C DE280432 C DE 280432C
- Authority
- DE
- Germany
- Prior art keywords
- thread
- leg
- compass
- guide
- focal
- 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.)
- Active
Links
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L11/00—Non-circular-curve-drawing instruments
- B43L11/02—Non-circular-curve-drawing instruments for drawing conic sections
- B43L11/04—Non-circular-curve-drawing instruments for drawing conic sections for drawing ellipses
- B43L11/045—Non-circular-curve-drawing instruments for drawing conic sections for drawing ellipses with cords or like flexible elements
Landscapes
- Lenses (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE280432C true DE280432C (cs) |
Family
ID=536269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT280432D Active DE280432C (cs) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE280432C (cs) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE892681C (de) * | 1951-02-15 | 1953-10-08 | Detlef Hofmann | Ellipsenzirkel mit Fuehrungsschnur |
| US3447243A (en) * | 1967-04-18 | 1969-06-03 | Ellipsograph Sa | Ellipsograph |
-
0
- DE DENDAT280432D patent/DE280432C/de active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE892681C (de) * | 1951-02-15 | 1953-10-08 | Detlef Hofmann | Ellipsenzirkel mit Fuehrungsschnur |
| US3447243A (en) * | 1967-04-18 | 1969-06-03 | Ellipsograph Sa | Ellipsograph |
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