School set square with integrated rotating angle disc for measuring angles from 0 to 180 degrees

Abstract

Set square with a substantially transparent, triangular base body, characterized in that a circular, freely rotatable angle disc is integrated in the central area of ​​the set square, which has a scale from 0 to 180 degrees.

Description

Technical field The present invention relates to a measuring and drawing instrument for mathematical instruction as well as for technical and didactic applications, in particular a set square for constructing, measuring, and representing angles in the range of 0 to 180 degrees. The invention can be used in the school context of primary and secondary education as well as in special education. State of the art Classic set squares with a permanently integrated degree scale are known from the prior art. However, these have several significant disadvantages. First, reading errors frequently occur due to reflections from the transparent material or an unclear zero point. Second, inaccuracies can arise during measurement if the set square shifts even slightly. Third, learners often need a separate protractor for precise angle measurements. While round or semicircular protractors with rotating discs are also known, their use for construction tasks is limited and they do not replace a classic set square. Object of the invention The object of the invention is to provide a set square that enables simplified, more precise, and more stable angle measurement. At the same time, the instrument should be particularly easy to use for children and learners with motor, visual, or cognitive impairments. Furthermore, the need to use a separate protractor in addition to the set square should be eliminated. Solution to the task The task described is solved by a set square that has a circular, freely rotatable angle disc in its central area. This angle disc is marked with a clearly legible scale from 0 to 180 degrees. The rotating disc is mounted so that it can rotate around a central axis, while the set square itself rests stably on the drawing surface. To measure an angle, the set square is aligned along one side of the angle, and the rotating disc is then turned to the other side, allowing the angle to be read directly and unambiguously. The zero point of the angle disc is arranged in such a way that it aligns with a base edge of the set square, ensuring a clear and error-free assignment of the angle measurement. Preferred embodiments In a preferred embodiment, the angle disc is transparent to allow the underlying surface to be seen. In another embodiment, the angle disc is equipped with a mechanical detent and / or locking function that prevents unintentional rotation and enables stepwise fixing at defined angular positions, for example, in 5-, 10-, or 15-degree increments. This makes orientation easier, especially for learners in primary and special education settings, and supports a safe, reproducible angle setting. In a further variant, the scale can be designed with enhanced contrast, for example, through color markings. In an optional digital embodiment, the angle disc can be combined with an electronic sensor and a digital display, so that the angle value is also output digitally. Construction and materials The set square is preferably made of transparent plastic, in particular polycarbonate or a comparable, shatterproof material. The angle disc can also be made of transparent or semi-transparent plastic. The disc is preferably mounted via a riveted or axle connection with low friction, enabling smooth and precise rotation. Technical advantages The integrated rotating disc significantly increases measuring accuracy, as the set square no longer needs to be repositioned while setting the angle. Reading errors are reduced because the scale can be aligned centrally and unambiguously. Operation is intuitive and particularly suitable for children, beginners, and inclusive classrooms. Commercial applicability The invention is industrially manufacturable and usable on a commercial scale. It is particularly suitable for the mass production of school and drawing materials, distribution through school supply providers, and use in educational institutions, special education centers, and therapeutic facilities.

Claims

Set square with an essentially transparent, triangular base body, characterized in that a circular, freely rotatable angle disc is integrated in the central area of ​​the set square, which has a scale from 0 to 180 degrees. Set square according to claim 1, characterized in that the angle disc is rotatably mounted about a central axis. Set square according to one of the preceding claims, characterized in that the angle disc has a mechanical detent and / or locking device with defined detent positions, so that the angle disc can be fixed in certain angular positions in stages and unintentional rotation is prevented. Set square according to one of the preceding claims, characterized in that the angle disc is transparent or semi-transparent. Set square according to one of the preceding claims, characterized in that the scaling of the angle disc is designed with enhanced contrast. Set square according to one of the preceding claims, characterized in that the angle disc is equipped with a mechanical friction mechanism. Set square according to one of the preceding claims, characterized in that the angle disc is combined with a digital angle measuring sensor. Set square according to claim 7, characterized in that the measured angle value is displayed on a digital display. Set square according to one of the preceding claims, characterized in that the base body is made of shatterproof plastic. Set square according to one of the preceding claims, characterized in that the angle disc has colored markings for better readability.