CZ302791A3 - triangle for drawing and projecting pictures - Google Patents

Abstract

Triangle over drawing and projection of images (1), made of transparent material, has a rotatably mounted in the cover (2) shafts (3) parallel to an isosceles hypotenuse the triangle on which the knurled are fixed rollers (4), which together with the protrusion (5) protrude below the bottom of the triangle by peace (x). The orientation of the triangle relative to the drawing image is performed the protrusion (6), the lines (7) or the sides of the triangle, on which different scales (8) are marked together with circle templates (9), nuts (10), auxiliary holes (11) and the radius ruler (12) makes it universally possible use.

Description

The invention relates to an isosceles triangular rectangle for drawing and projecting images on which they are. centered most used scales, templates, protractor and rectilinear triangular device, allowing it to be universally used in designing and in administration in various areas of industry.

Background Art

Currently used drawing and projection methods are based on the principle of using a set of triangles and rulers that also require the use of additional scales, templates and protractors, while drawing with them is impractical. Pantographic and coordinate drawing devices are financially very demanding, require the use of other scales and templates, and have considerable demands on the office surface.

SUMMARY OF THE INVENTION

The described drawbacks of the prior art image removal devices are eliminated by the drawing and projection triangle of the invention, which consists in the fact that two rollers are circumferentially grooved in the cover, fixed to the cover, parallel to the hypotenuse, preferably an isosceles rectangular triangle of translucent material. a rotating shaft which, with its grooved surface, protrudes beneath the lower surface of the triangle and rolls over a planar support on which it is drawn. The orientation of the triangle on the substrate is performed by a graduated graduated graduation, auxiliary line, and triangular sides. The most commonly used scales are marked on the sides of the triangle, the most used templates and scales are conveniently placed on the free surfaces of the triangle, they use them.

The advantage of the device arrangement according to the invention is that it has a simple construction and universal application.

With gentle hand pressure on the triangle cover, this moves straight, i.e. perpendicular to the hypotenuse, while providing a straight line! rotating grooved rollers, which are wrapped in the mat to which they are drawn. The different direction of movement of the triangle is achieved by rotating it appropriately with the help of a protractor, ancillary lines, or slope of the triangle. Image enlargement and shrinking are achieved by using the various scales that are marked on the sides of the triangle, and the drawing of different shapes is enabled by the templates used, such as circles and nuts, or other templates specific to the profession. The sides of the triangle can be used to draw images, but also to hatch cuts with a pencil or ink. Auxiliary openings, parallel to the triangle hypotenuse, can be used to move perpendicular to the hypotenuse or long straight lines. When using a radius ruler, larger diameters can be made.

An embodiment of the invention

An example of a triangle arrangement according to the invention for a machine profession is shown in FIGS. 1 and 2. On the translucent triangle 1, a cover 2 is attached, in which the shaft is rotatably mounted parallel to the triangular hypotenuse, on which two knurled rollers 6 are fixedly fixed. which, along with the protrusion, protrude below the bottom of the triangle by a measure of x. On the triangle there is a protractor with graduation 6, auxiliary orientation lines 7, on the sides of the triangle are marked scale 8, on the free surfaces there are templates of inner and outer circles 9, nuts 10 and parallel to the hypotenuse there are auxiliary holes 11.Pri, point of rectangular of the triangle is a radius ruler 12 for larger radii whose position is set by screw, washer and nut 12 ·

- 3 Smart Usability

Triangle for drawing and projection of knives images with the use of basic pupils and students of secondary schools and universities especially with technical stage orientation. It can also be used in design and design offices, but also in administration in various areas of industry.

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Claims (1)

Triangle for drawing and premietsnie giants marked by the fact that parallel to the hypotenuse, a translucent rectangular triangle (1) is in the housing (2), rotatably mounted shaft (3), with fixed gripping rollers (4), symmetrical to the height of the triangle to the preoons displaced by the protractors (6), the auxiliary lines (7) and the sides of the triangle with marked dew measures (8). Apparatus according to claim 1, characterized in that the most commonly used templates of inner and outer circles (9), nuts (10), auxiliary holes (11) are arranged parallel to the triangle hypotenuse and radius ruler (12), adjustable by screw, washer and nut / 13 /. Device according to Claims 1 and 2, characterized in that the grooved rollers (4) and the protrusion (5) project below the lower surface of the triangle with a measure (x) of more than 0.1 mm.