DE346074C - - Google Patents

Info

Publication number
DE346074C
DE346074C DE1920346074D DE346074DA DE346074C DE 346074 C DE346074 C DE 346074C DE 1920346074 D DE1920346074 D DE 1920346074D DE 346074D A DE346074D A DE 346074DA DE 346074 C DE346074 C DE 346074C
Authority
DE
Germany
Prior art keywords
compass
cord
legs
shortened
leg
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
DE1920346074D
Other languages
German (de)
English (en)
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 DE346074C publication Critical patent/DE346074C/de
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)
  • General Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Catching Or Destruction (AREA)
  • Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
  • Adornments (AREA)
DE1920346074D 1920-12-15 1920-12-15 Expired DE346074C (es)

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 (es) 1920-12-15 1925-07-09

Publications (1)

Publication Number Publication Date
DE346074C true DE346074C (es) 1921-12-23

Family

ID=40394418

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1920346074D Expired DE346074C (es) 1920-12-15 1920-12-15

Country Status (6)

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

Also Published As

Publication number Publication date
US1411493A (en) 1922-04-04
GB176915A (en) 1922-03-23
CH90494A (de) 1921-09-01
FR529703A (fr) 1921-12-05
NL17499C (es) 1927-07-15

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