FR2431378A1 - Compas trace ellipses - Google Patents

Compas trace ellipses

Info

Publication number
FR2431378A1
FR2431378A1 FR7821644A FR7821644A FR2431378A1 FR 2431378 A1 FR2431378 A1 FR 2431378A1 FR 7821644 A FR7821644 A FR 7821644A FR 7821644 A FR7821644 A FR 7821644A FR 2431378 A1 FR2431378 A1 FR 2431378A1
Authority
FR
France
Prior art keywords
arm
compasses
angle
circular disc
ellipses
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.)
Withdrawn
Application number
FR7821644A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 by Individual filed Critical Individual
Priority to FR7821644A priority Critical patent/FR2431378A1/fr
Publication of FR2431378A1 publication Critical patent/FR2431378A1/fr
Withdrawn legal-status Critical Current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
    • B43L11/041—Non-circular-curve-drawing instruments for drawing conic sections for drawing ellipses by means of a compass

Landscapes

  • Telephone Set Structure (AREA)

Abstract

Dispositif permettant de tracer des cercles et des ellipses de toutes dimensions sans avoir à se servir de gabarits de cercles et d'ellipses. Il comprend un plateau circulaire inclinable traversé par un axe central, sur lequel il peut se bloquer en plusieurs positions. Autour de cet ensemble tourne un bras portant à son extrémité un crayon ou un appareil pour tracer à l'encre. Un ressort supporté par une tige maintient ce dit bras en contact avec le plateau quelle que soit la position de celui-ci. Le plateau servira donc de guide au bras. Un pied coudé est rattaché à l'axe central et empêche celui-ci de pivoter. L'invention peut être utilisée pour le traçage à l'encre ou au crayon des cercles et des ellipses.
FR7821644A 1978-07-19 1978-07-19 Compas trace ellipses Withdrawn FR2431378A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7821644A FR2431378A1 (fr) 1978-07-19 1978-07-19 Compas trace ellipses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7821644A FR2431378A1 (fr) 1978-07-19 1978-07-19 Compas trace ellipses

Publications (1)

Publication Number Publication Date
FR2431378A1 true FR2431378A1 (fr) 1980-02-15

Family

ID=9211022

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7821644A Withdrawn FR2431378A1 (fr) 1978-07-19 1978-07-19 Compas trace ellipses

Country Status (1)

Country Link
FR (1) FR2431378A1 (fr)

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Legal Events

Date Code Title Description
RE Withdrawal of published application