FR529703A - Ellipse compass - Google Patents

Ellipse compass

Info

Publication number
FR529703A
FR529703A FR529703DA FR529703A FR 529703 A FR529703 A FR 529703A FR 529703D A FR529703D A FR 529703DA FR 529703 A FR529703 A FR 529703A
Authority
FR
France
Prior art keywords
ellipse compass
compass
ellipse
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
Johann Hardt
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 FR529703A publication Critical patent/FR529703A/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
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
    • C10G9/40—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils by indirect contact with preheated fluid other than hot combustion gases

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Adornments (AREA)
  • Catching Or Destruction (AREA)
  • Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
FR529703D 1920-12-15 1921-01-07 Ellipse compass Expired FR529703A (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE346074T 1920-12-15
CH90494T 1920-12-20
GB36045/20A GB176915A (en) 1920-12-15 1920-12-23 Ellipsograph
FR529703T 1921-01-07
US451359A US1411493A (en) 1920-12-15 1921-03-10 Ellipsograph
NL30707A NL17499C (en) 1920-12-15 1925-07-09

Publications (1)

Publication Number Publication Date
FR529703A true FR529703A (en) 1921-12-05

Family

ID=40394418

Family Applications (1)

Application Number Title Priority Date Filing Date
FR529703D Expired FR529703A (en) 1920-12-15 1921-01-07 Ellipse compass

Country Status (6)

Country Link
US (1) US1411493A (en)
CH (1) CH90494A (en)
DE (1) DE346074C (en)
FR (1) FR529703A (en)
GB (1) GB176915A (en)
NL (1) NL17499C (en)

Also Published As

Publication number Publication date
GB176915A (en) 1922-03-23
DE346074C (en) 1921-12-23
US1411493A (en) 1922-04-04
CH90494A (en) 1921-09-01
NL17499C (en) 1927-07-15

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