Portable drafting device for drawing parallel lines, comprising

Details Portable drafting device for drawing parallel lines, comprising Portable drafting device for drawing parallel lines, comprising

1979-04-25

1981-03-10

Phillips, Charles E.

Geometrical instruments

Straightedge type

Base attached

33443, 108 27, B43L 500

Patent

active

042545560

ABSTRACT:
A portable drafting device for drawing parallel lines, consisting of a rectangular flexible plastic material, two guides applied each on one of the short sides of the board, at least one slider adapted to slide on one of said guides, a rule fastened to at least one slider to slide therewith above said board for drawing parallel lines, said board being capable to be rolled into a roll for rendering it easily transportable.

REFERENCES:
patent: 184541 (1876-11-01), Minehart
patent: 196636 (1877-10-01), Cushman
patent: 328525 (1885-10-01), Shaver
patent: 1290343 (1919-01-01), Posner
patent: 2623324 (1952-12-01), La Barber

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