Variable angle straight edge

Details Variable angle straight edge Variable angle straight edge

B - Operations, Transporting

43

L

33/69

B43L 5/00 (2006.01)

Patent

CA 1210577

Case No. 4542.26 ABSTRACT A drafting tool functioning as a variable angle straight edge comprises an elongated rectangular main body portion made of transparent material. The lower edge of this main body portion has a first straight edge extending a major portion of the length of the main body portion from one end toward the other end to terminate at a point between the two ends. This edge is spaced a first distance from the top edge of the tool. A second straight edge parallel to the top edge and the first straight edge extends from the other end of the tool toward the termination point and is spaced a greater distance from the top edge than is the spacing between the top edge and the first straight edge. The two edged are interconnected by an offset forming a notch to receive the point of a drafting instrument at the junction of the offset and the first straight edge. This junction is made the point of origin of a protractor formed on the drafting tool, the base line of which on one side of the junction comprises the first straight edge and on the other side of the junction comprises a line spaced from the second straight edge.

458261

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