Patent ID: 8500016
Filing Date: 2013-08-06
Classification: G06G

Abstract:
1. An analog ballistic system calculator for long range shooting comprising: a stationary, flat, rectangular rule member having an axial center, a front face, and a rear face; said front face having an outer, circular face scale with a target indicia and an inner angle/cosine scale, and an angle fire protractor within said angle/cosine scale; a rotatable, transparent disc mounted on said front face having an outer front disc scale adjacent said outer, circular face scale and an inner front disc scale spaced from said outer front disc scale adjacent said inner angle/cosine scale, wherein said outer, circular face scale and said outer front disc scale configured for multiplication and division and computing distance to a target by aligning a target size located on said outer front disc scale with said target indicia on said outer, circular face scale; said rear face having a rear face sum scale in an outer ring of numbers, a rear face direction scale ranging from zero to 12 o'clock inner to and spaced from said outer ring of numbers, a rear face target bloc inner to said direction scale, and rear face annular arrays of inner, blank cosine cells; large and small transparent discs, independently and rotatably mounted on said rear face; wherein said large disc having an addition and subtraction scale in a disc outer section thereof adjacent to said rear face sum scale, and ½ and ⅓ scales on a disc inner section spaced from said disc outer section configured for quick division needed for windage adjustment equations and interpolation; and wherein said small disc is rotatably mounted over said large disc and having means to calculate cosine values of wind speed to compensate for wind direction.