US1661538A - Universal parallel drafting device - Google Patents

Universal parallel drafting device Download PDF

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Publication number
US1661538A
US1661538A US756519A US75651924A US1661538A US 1661538 A US1661538 A US 1661538A US 756519 A US756519 A US 756519A US 75651924 A US75651924 A US 75651924A US 1661538 A US1661538 A US 1661538A
Authority
US
United States
Prior art keywords
triangle
rods
drafting device
universal parallel
parallelograms
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 - Lifetime
Application number
US756519A
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English (en)
Inventor
Marzetti Manlio
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 US1661538A publication Critical patent/US1661538A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B43L13/02—Draughting machines or drawing devices for keeping parallelism
    • B43L13/04—Guides for rulers
    • B43L13/06—Guides for rulers with pivoted guide rods

Definitions

  • the invention relates to an improved drawing instrument for use in drawing parallel lines in any desired direction.
  • the improved instrument is illustrated, by way of example, in the accompanying drawing.
  • the instrument comprises two systems. of swivel parallelograms 1v and 2, each being constituted by three rods 3, 4,5 and 6, 7, 8,
  • the upper triangle 9 serves as a ybase for the movements of the parallelograms and comprises a U-shaped metal plate 12 which vis rigidly attached by means of screws to the rear of the upper edge of the drawing board 13.
  • the rods 3 and 4 have their ends pivot- ⁇ ally mounted at the corners 14 and 15, on theupper face of the triangle 9, while one of the ends of the rod 5 is pivoted at the third corner 160i the triangle 9, but on the lower. face of the triangle so that the said rod 5- lies in a diiierentv plane from that of the rods 3 and 4:.
  • the opposite ends ofthe rods 3, 4 and 5 are all Vpivoted on theV upper face of the triangle 10, at the ⁇ corners 17, 18 and 19 respectively.
  • the pivoting point 19 lies at a lower 'level than that of the pivoting points 17 and 18, in order to maintain therod 5 in a different plane from that of the rods 3 and 4.
  • the upper endsof the rods S The upper endsof the rods S.
  • the triangle 11 is provided with a protractor 23 which'is pivotally mounted at 24, on an extension of the triangle 11; the protractor being capable of adjustment to any desired position and having extending therefrom two rulers 25 and'26 arranged at an angle of 901o to each other.
  • lVhat I claim is An instrument forense in drawing parallel lines comprising a. Xed base triangle, a second triangle, three parallel rods pivotally connecting the corners Vof the base triangle with the corners of the second triangle, a

Landscapes

  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
US756519A 1923-12-20 1924-12-17 Universal parallel drafting device Expired - Lifetime US1661538A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1661538X 1923-12-20

Publications (1)

Publication Number Publication Date
US1661538A true US1661538A (en) 1928-03-06

Family

ID=11434443

Family Applications (1)

Application Number Title Priority Date Filing Date
US756519A Expired - Lifetime US1661538A (en) 1923-12-20 1924-12-17 Universal parallel drafting device

Country Status (3)

Country Link
US (1) US1661538A (de)
DE (1) DE419553C (de)
FR (1) FR590595A (de)

Also Published As

Publication number Publication date
FR590595A (fr) 1925-06-19
DE419553C (de) 1925-10-09

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