Mayline Company, Inc.

C Jim Loggins

The present invention discloses a multi-purpose drafting instrument adapted to combine the functions of drafting triangles and commonly used drafting scales. The drafting instrument of the invention generally comprises an L-shaped integrally formed substantially planar construction having two legs of equal length and width disposed perpendicular to each other. The end of each leg is inclined at an angle of 45 degrees relative the outer edge of each leg, the upper face of each leg is beveled at its inner edge to provide a thin working edge, and a ruled scale is provided on the lower face of each leg at its inner edge. The drafting instrument also includes a plurality of glide points extending outwardly from the lower face of the instrument to support the instrument slightly above the surface upon which it is used, and a handle disposed near the intersection of the two legs of the instrument to facilitate its use.

Ruled multi-purpose drafting instrument

The present invention discloses a bilateral adhesive assembly adapted to the primary purpose of removeably adhering a sheet of drafting paper or drafting film to a drafting board. The adhesive assembly of the invention generally comprises an elongate adhesive inhibiting carrier tape, a plurality of preferably rectangular stickers substantially coated on one side and partially coated on the opposite side with a pressure sensitive adhesive compound and contiguously disposed along the carrier tape with the substantially coated side in contact with the carrier tape, and a plurality of adhesive inhibiting protective tabs each disposed over the pressure sensitive adhesive compound on the partially coated side of each of the stickers. The adhesive assembly is formed into a roll and is preferably provided in a dispenser box suitable for dispensing individual stickers from the roll.

Bilateral adhesive assembly

The drafting instrument of the invention generally comprises a triangular integrally formed substantially planar construction having three perimeter legs, interconnected end to end to form the triangular configuration and define an open space in the interior of the body, and one interior leg extending across the open space to form interior complementary angles to the angles formed at the respective intersections of the perimeter legs. The instrument is provided in two primary embodiments, the first adapted as a 30/60 degree triangular instrument and the second as a 45 degree triangular instrument. The instrument includes a plurality of glide points extending outwardly from one or both faces of the instrument to support the instrument slightly above the surface upon which it is used, and further includes a handle assembly disposed near the intersection of two of the perimeter legs of the instrument. In the preferred embodiments of the invention the handle is slideably disposed in an aperture and retained therein by thin end caps, allowing the handle to slide freely through the aperture in a direction perpendicular to the plane of the instrument.

Triangular drafting instrument

The drafting instrument of the invention generally comprises an L-shaped integrally formed substantially planar construction having one long leg and one short leg disposed perpendicular to each other. The end of each of the legs of the instrument is inclined at an angle of 45 degrees relative to the outer edge of each leg, and the lengths of the legs of the instrument are proportioned such that complimentary 60 degree and 30 degree angles are formed between the edge of the short leg and the edge of the long leg, respectively, and a straight line intersecting the end point of each leg. The instrument includes a plurality of glide points extending outwardly from each face of the instrument to support the instrument slightly above the surface upon which it is used, and further includes a handle disposed near the intersection of the two legs of the instrument to aid in reversing the instrument from face to face during use. The handle is preferably slideably disposed in an aperture and retained therein by thin end caps, allowing the handle to slide freely through the aperture in a direction perpendicular to the plane of the instrument.

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Sheboygan, WI, United States of America

C Jim Loggins