FR392178A - Compass for drawing special curves such as ellipses, hyperbolas, parabolas and other conical sections - Google Patents

Compass for drawing special curves such as ellipses, hyperbolas, parabolas and other conical sections

Info

Publication number
FR392178A
FR392178A FR392178DA FR392178A FR 392178 A FR392178 A FR 392178A FR 392178D A FR392178D A FR 392178DA FR 392178 A FR392178 A FR 392178A
Authority
FR
France
Prior art keywords
hyperbolas
parabolas
ellipses
compass
conical sections
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
French (fr)
Inventor
Herman Boulenger
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
Application granted granted Critical
Publication of FR392178A publication Critical patent/FR392178A/en
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
FR392178D 1908-07-07 1908-07-07 Compass for drawing special curves such as ellipses, hyperbolas, parabolas and other conical sections Expired FR392178A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR392178T 1908-07-07

Publications (1)

Publication Number Publication Date
FR392178A true FR392178A (en) 1908-11-19

Family

ID=1437573

Family Applications (1)

Application Number Title Priority Date Filing Date
FR392178D Expired FR392178A (en) 1908-07-07 1908-07-07 Compass for drawing special curves such as ellipses, hyperbolas, parabolas and other conical sections

Country Status (1)

Country Link
FR (1) FR392178A (en)

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