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FR779419A - Compas permettant de tracer directement sans calculs les ellipses et les spirales - Google Patents

Compas permettant de tracer directement sans calculs les ellipses et les spirales

Info

Publication number
FR779419A
FR779419A FR779419DA FR779419A FR 779419 A FR779419 A FR 779419A FR 779419D A FR779419D A FR 779419DA FR 779419 A FR779419 A FR 779419A
Authority
FR
France
Prior art keywords
ellipses
spirals
calculations
drawn directly
compass
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
Application number
Other languages
English (en)
Inventor
Cesar Smetz
Leon Suptil
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR779419A publication Critical patent/FR779419A/fr
Expired 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
    • B43L11/055—Non-circular-curve-drawing instruments for drawing conic sections for drawing ellipses with guides

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Toys (AREA)
FR779419D 1934-07-31 1934-07-31 Compas permettant de tracer directement sans calculs les ellipses et les spirales Expired FR779419A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR625447X 1934-07-31

Publications (1)

Publication Number Publication Date
FR779419A true FR779419A (fr) 1935-04-04

Family

ID=8987731

Family Applications (1)

Application Number Title Priority Date Filing Date
FR779419D Expired FR779419A (fr) 1934-07-31 1934-07-31 Compas permettant de tracer directement sans calculs les ellipses et les spirales

Country Status (2)

Country Link
DE (1) DE625447C (fr)
FR (1) FR779419A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4356633A (en) * 1981-07-27 1982-11-02 Marian Poll Ellipsograph

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4356633A (en) * 1981-07-27 1982-11-02 Marian Poll Ellipsograph

Also Published As

Publication number Publication date
DE625447C (de) 1936-02-08

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