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
Application number
DENDAT280432D
Other languages
German (de)
English (en)
Publication of DE280432C publication Critical patent/DE280432C/de
Active legal-status Critical Current

Links

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)
DENDAT280432D Active DE280432C (cg-RX-API-DMAC10.html)

Publications (1)

Publication Number Publication Date
DE280432C true DE280432C (cg-RX-API-DMAC10.html)

Family

ID=536269

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT280432D Active DE280432C (cg-RX-API-DMAC10.html)

Country Status (1)

Country Link
DE (1) DE280432C (cg-RX-API-DMAC10.html)

Cited By (2)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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