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US 5,628,118 AGranted
Mini-drafting machine
OwnerTeodorico M. Riverainventor
Life of this patent
Estimating the term…
Abstract
A mini-drafting machine that is structured so that it can be guided horizontally and vertically along a flat surface, such as a piece of paper. Horizontal, vertical and diagonal lines, as well as different sized arcs and circles, can be drawn upon the flat surface. Different sized geometric shapes can also be made upon the flat surface with built-in templates. The lengths of the vertical, horizontal and diagonal lines can be measured, while the angle of the diagonal lines can be determined.
Claims11
A mini-drafting machine which comprises:
- a) a body member having a horizontal straight blade along a top side edge for drawing a horizontal line on a flat surface;
- b) means for guiding said body member vertically along the flat surface comprising two pair of spaced independently mounted and rotatable wheel assemblies on the underside of said body member normally oriented to permit paid body member to roll vertically to permit the drawing of parallel horizontal lines by said horizontal straight edge, each wheel assembly having a wheel with a pinion gear mounted thereon for rotating each wheel assembly with respect to said body, a pair of spaced apart racks carried in said body member engaging the pinion gear in each pair of wheel assemblies, spring biased push bar means mounted on the upper side of said body member for engaging said racks so that when said push bar is pressed against the spring biasing said racks will rotate said pinion gears to ninety degrees causing said wheels to also pivot the ninety degrees to change direction of movement of the body member from a vertical direction to a horizontal direction along the flat surface without rotating said body on said flat surface;
- c) means in said body member for making different sized geometric shapes on the flat surface.
Dependencies are inferred from the claim text.