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Length-Measuring Instruments Using Mechanical Means
(AREA)
A Measuring Device Byusing Mechanical Method
(AREA)
Abstract
A goniometric square for drawing, characterized by being constituted, preferably, by a bevel of any suitable material, such as metal, artificial resin, wood or other, in whose plane there is a circular hollow, whose edges are bearing of a central disc rotating, marginalized by a circular crown subdivided into several other crowns, each equipped with graduations and own data to indicate, on the front and on the back, all the results for the measurement and study of angles, such as its value in sexagesimal and centesimal degrees with approximations, the sine, cosine, tangent and cotangent, the length of the arc of radius unit and, as a complement, the lengths of circumference and the areas of the circle, leaving an external crowns divided, to determine the divisions of the circumference in a determined number of parts, whose data are obtained by the relation of the movement of the central disc with respect to the c fixed oronas and with intervention of a reglilla possibly coupled to the central disk, whose reglilla serves as indicator of data and as nonius for the approaches; also carrying both fronts of the bevel auxiliary circles for powers and roots, for the drawing of curves, such as spirals, ellipses or others, and a plurality of regular polygons from the equilateral triangle to 15 sides or more, with their corresponding data to each one. (Machine-translation by Google Translate, not legally binding)
ES0024022U1950-07-211950-07-21
Goniometric square for drawing.
ExpiredES24022Y
(en)
New system to automatically determine the weight and size that corresponds to each age and sex (Machine-translation by Google Translate, not legally binding)