Multifunctional drawing and writing instrument

Claim 1

A multifunctional drawing instrument comprising: a) a straightedge member comprising: i) a first and second elongate members hingedly attached at respective first ends thereof, each elongate member having a generally planar surface for resting said straightedge member on a drawing surface, and a cooperating stop surface for limiting further rotation of a first elongate member away from a second elongate member when the first and second elongate members are in parallel registry; ii) positioning means disposed over the hinge axis defined between the first and second elongate members on a side opposite from the planar surfaces thereof, for maintaining said straightedge member over a selected position on a drawing surface with the first and second elongate members being separated from the drawing surface by a predetermined space; b) an elongate body having; i) an axially aligned receiving space defined therein for housing said straightedge member when the first and second elongate members thereof are folded together; ii) an aperture on the terminal end of a first end portion of said body; iii) an arcuate slot formed on a periphery of the first end portion of said body at a predetermined acute angle with respect to a longitudinal axis thereof and penetrating into said body to a predetermined depth, for engaging a longitudinal edge portion of an elongate member when spaced from a drawing surface by said positioning means so that the aperture of said body is proximate the drawing surface; c) at least one delineating member releasably secured within said body and having a marking tip on a first end thereof extendible through the aperture of said body; d) securing means for releasably securing said straightedge member to said body within the receiving space thereof.