Graduated ruler for pespective drawing

Details Graduated ruler for pespective drawing Graduated ruler for pespective drawing

G - Physics

01

B

33/88

G01B 3/04 (2006.01)

Patent

CA 1088303

ABSTRACT. To draw lines converging to or diverging from a point with an ordinary ruler, it is necessary to locate the edge or the ruler on the fixed point each time a thin line is to be drawn, and care has to be taken to put the edge of an ordinary ruler a distance away from the fixed point when a thick line is to be drawn. The different position of the holes in the invented ruler wherein a pivot is inserted, enables the accurate and quick drawing of such lines of different thickness.

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