GB282686A - Instrument for drawing curves of conic section - Google Patents

Instrument for drawing curves of conic section

Info

Publication number
GB282686A
GB282686A GB34528/27A GB3452827A GB282686A GB 282686 A GB282686 A GB 282686A GB 34528/27 A GB34528/27 A GB 34528/27A GB 3452827 A GB3452827 A GB 3452827A GB 282686 A GB282686 A GB 282686A
Authority
GB
United Kingdom
Prior art keywords
points
marked
point
curves
axis
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
GB34528/27A
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
Publication of GB282686A publication Critical patent/GB282686A/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

Abstract

282,686. Krakowski, V. Dec. 22, 1926, [Convention date]. Templets for drawing conic sections have a parabolic edge a, hyperbolic edges b and an elliptical aperture e. The templet is marked with a central line which is an axis of all the curves and is also marked with pinholes from which other information relative to the curves is obtainable. Thus the point k is the focus of the parabola, the points h, h<1> lie at the intersections of the major axis of the ellipse with the directrices, and the foci are obtained by joining points l, L and m, m. Marks n represent the extremities of a pair of conjugate diameters. The point o is the centre of the hyperbola and the asymptotes are obtained by joining this point to the lower points l. m. The points i, i<1> represent the intersections of the axis of the hyperbola with its directrices, and the foci lie on the lines l l, m m produced. The upper part of the templet is marked with a protractor scale f, and the lower straight edge c is graduated.
GB34528/27A 1926-12-22 1927-12-20 Instrument for drawing curves of conic section Expired GB282686A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH282686X 1926-12-22

Publications (1)

Publication Number Publication Date
GB282686A true GB282686A (en) 1928-08-23

Family

ID=4483764

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34528/27A Expired GB282686A (en) 1926-12-22 1927-12-20 Instrument for drawing curves of conic section

Country Status (2)

Country Link
FR (1) FR649308A (en)
GB (1) GB282686A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487673A (en) * 1944-11-21 1949-11-08 Roper Austin John Geometrical sketching template
US3279074A (en) * 1963-11-29 1966-10-18 Sr Daniel Joseph Mcquaid Isometric drafting instruments
CN102950942A (en) * 2012-11-09 2013-03-06 郑福建 Dual-curve instrument
CN106739686A (en) * 2017-02-07 2017-05-31 满洪流 Curve tracing and measurement facility

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487673A (en) * 1944-11-21 1949-11-08 Roper Austin John Geometrical sketching template
US3279074A (en) * 1963-11-29 1966-10-18 Sr Daniel Joseph Mcquaid Isometric drafting instruments
CN102950942A (en) * 2012-11-09 2013-03-06 郑福建 Dual-curve instrument
CN102950942B (en) * 2012-11-09 2016-03-23 郑福建 Dual-curve instrument
CN106739686A (en) * 2017-02-07 2017-05-31 满洪流 Curve tracing and measurement facility

Also Published As

Publication number Publication date
FR649308A (en) 1928-12-20

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