Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
396 words
A graphics instrument comprising an annular inner scale member having a circular outer periphery and a circular inner periphery, an outer scale member having a circular inner periphery mounted for rotation with respect to the outer periphery of the inner member about a common center, said inner and outer members having co-planar surfaces which are adapted to move over a graphics surface, said outer member being formed with an outer periphery in the configuration of a polygon having adjacent sides which are in orthogonal relation to each other, means forming a first continuous graduated scale about the entire outer periphery of said inner member, means forming a second continuous graduated scale about the entire inner periphery of said outer member in register with said first scale whereby the scale members can be positioned in a selected angular relationship, an elongate member mounted on the inner member, said elongate member being formed with parallel side edges with one of the side edges extending along and forming a first straight edge along a diameter of the inner member, each side edge of the elongate member cooperating with the inner periphery of the inner member to form a pair of substantially semicircular openings of a large area relative to the areas of said co-planar surfaces whereby the semi-circular openings provide substantial open spaces for drawing and locating a wide range of angles, lines and points on the graphic surface, and means forming a third graduated scale along the first straight edge, and the outer edges of the polygon on the outer scale member forming additional straight edges, wherein said polygon configuration comprises a square, and each outer edge of said square configuration comprises a straight edge, wherein the first graduated scale includes indicia displaying a scale of angular degree measurement and indicia indicating a scale of angular radian measurement, wherein the second graduated scale includes indicia displaying a scale of trigonometric function values for the corresponding degree or radian measurements on the first scale, wherein the trigonometric function values include sine and cosine values, and wherein said first straight edge is aligned with the 0* trigonometric function values of said second graduated scale and said first graduated scale is arranged so that its 0* indicia will be in alignment with said first straight edge when said first straight edge is parallel to an outer edge of said square configuration.
Claim 2
Dependent Claim
396 words
A graphics instrument comprising an annular inner scale member having a circular outer periphery and a circular inner periphery, an outer scale member having a circular inner periphery mounted for rotation with respect to the outer periphery of the inner member about a common center, said inner and outer members having co-planar surfaces which are adapted to move over a graphics surface, said outer member being formed with an outer periphery in the configuration of a polygon having adjacent sides which are in orthogonal relation to each other, means forming a first continuous graduated scale about the entire outer periphery of said inner member, means forming a second continuous graduated scale about the entire inner periphery of said outer member in register with said first scale whereby the scale members can be positioned in a selected angular relationship, an elongate member mounted on the inner member, said elongate member being formed with parallel side edges with one of the side edges extending along and forming a first straight edge along a diameter of the inner member, each side edge of the elongate member cooperating with the inner periphery of the inner member to form a pair of substantially semicircular openings of a large area relative to the areas of said co-planar surfaces whereby the semi-circular openings provide substantial open spaces for drawing and locating a wide range of angles, lines and points on the graphic surface, and means forming a third graduated scale along the first straight edge, and the outer edges of the polygon on the outer scale member forming additional straight edges, wherein said polygon configuration comprises a square, and each outer edge of said square configuration comprises a straight edge, wherein the first graduated scale includes indicia displaying a scale of angular degree measurement and indicia indicating a scale of angular radian measurement, wherein the second graduated scale includes indicia displaying a scale of trigonometric function values for the corresponding degree or radian measurements on the first scale, wherein the trigonometric function values include sine and cosine values, and wherein said first straight edge is aligned with the 0* trigonometric function values of said second graduated scale and said first graduated scale is arranged so that its 0* indicia will be in alignment with said first straight edge when said first straight edge is parallel to an outer edge of said square configuration.