Precision tool for locating center lines in geometric shapes

摘要

The disclosed invention relates to easy-to-use precision tools that locate the mid-line, or center line, of any symmetrical geometric shape, such as triangles, squares, circles, rectangles, parallelograms, trapezoids, and symmetrical polygons. Given two separate points on the edge of a symmetrical geometric shape, these precision tools identify the center line of the geometric shape between those two points, without the need for additional measurements or mathematical calculations. The precision tools can also be used to identify the center points of symmetrical geometric shapes.

主权项

1. A precision tool for locating a center line of a geometric shape, comprising:
a) a base leg with a slot along a midline of the base leg, a first plurality of openings generally parallel to the slot, and a second plurality of openings generally parallel to the midline of the base leg;
wherein the first plurality of openings are positioned in precise alignment with the second plurality of openings, andwherein the slot lies between the first plurality of openings and the second plurality of openings; b) a pair of positioning legs that are longer than the base leg, each positioning leg further comprising a plurality of openings in the precise alignment with a plurality of first openings in the base leg, plus a second opening at a distal end of the positioning leg; and d) a central leg shaped like an elongated capital letter “H”; and e) a fastener; wherein each positioning leg is slidingly attached adjacent to the base leg, such that the plurality of first openings in each positioning leg is in alignment with either the first plurality of openings of the base leg or the second plurality of openings of the base leg, the slot of the base leg runs between the pair of positioning legs, and the second opening extends past a bottom edge of the base leg; wherein the fastener slidingly attaches the central leg to the slot of the base leg, such that the fastener can move along the slot, the central leg is positioned adjacent to the pair of positioning legs and perpendicular to the slot; and wherein the distance between the second opening of one positioning leg and the midline of the base leg is equal to the distance between the second opening of the other positioning leg and the midline of the base leg.