GB671669A - Improvements in or relating to apparatus for drawing centric projections, such as perspectives from orthographic projections or vice versa - Google Patents

Improvements in or relating to apparatus for drawing centric projections, such as perspectives from orthographic projections or vice versa

Info

Publication number
GB671669A
GB671669A GB6906/49A GB690649A GB671669A GB 671669 A GB671669 A GB 671669A GB 6906/49 A GB6906/49 A GB 6906/49A GB 690649 A GB690649 A GB 690649A GB 671669 A GB671669 A GB 671669A
Authority
GB
United Kingdom
Prior art keywords
lamina
projections
ruler
line
vice versa
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
GB6906/49A
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 GB671669A publication Critical patent/GB671669A/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
    • B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
    • B43L13/14—Devices for drawing in perspective
    • B43L13/141—Two-dimensional devices

Landscapes

  • Instructional Devices (AREA)
  • Drawing Aids And Blackboards (AREA)

Abstract

671,669. Photogrammetry; drawing-appliances. ASPLUND, B. D. March 14, 1949 [March 15, 1948], No. 6906/49. Classes 97 (ii) and 97 (iii). Apparatus for producing projections, particularly for producing a perspective projection from an orthographic projection, and vice versa, comprises a ruler 45 having a rectilinear edge, a lamina 42 having a rectilinear bearing line 44 and a line system at right angles to the bearing line so arranged as to permit points along at least one side thereof on the paper 41 to be used for the projecting operation to be seen from above the lamina, both the ruler and the lamina being pivotally arranged about an axis 43 through which pass both the ruler edge and the lamina bearing line 44 or its extension, and a pin coaxial with the axis 43 adapted to secure the ruler and the lamina to a support. Preferably the lamina is provided with a line system parallelling the bearing line 44 and, as shown, the intervals of at least one of the line systems are equal. The lamina is preferably transparent.
GB6906/49A 1948-03-15 1949-03-14 Improvements in or relating to apparatus for drawing centric projections, such as perspectives from orthographic projections or vice versa Expired GB671669A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE271961X 1948-03-15

Publications (1)

Publication Number Publication Date
GB671669A true GB671669A (en) 1952-05-07

Family

ID=20306781

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6906/49A Expired GB671669A (en) 1948-03-15 1949-03-14 Improvements in or relating to apparatus for drawing centric projections, such as perspectives from orthographic projections or vice versa

Country Status (5)

Country Link
BE (1) BE487847A (en)
CH (1) CH271961A (en)
DE (1) DE913239C (en)
FR (1) FR982895A (en)
GB (1) GB671669A (en)

Also Published As

Publication number Publication date
BE487847A (en)
DE913239C (en) 1954-06-10
CH271961A (en) 1950-11-30
FR982895A (en) 1951-06-15

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