SU666109A1 - Drawing appliance - Google Patents

Description

The invention relates to drawing instruments and can be used in design practice.

A drawing device is known that contains a writing device and a template with openings for holding circles of small diameter and a notch located in its center with mutually perpendicular edges along which the scales 1 are applied.

The known pattern does not allow large-radius circles and is inconvenient to use.

The purpose of this invention is to expand the range of tasks and increase usability.

For this purpose, it has an arcuate direction with equal slots, the template is made in the form of a disk, mounted in a direction with a possibility of rotation, and has a spring-loaded lock of its angular position, which enters the guide sockets, and the cutout of the template has two intersecting

edges, the point of intersection of which coincides with the center of the template, and the writing device is mounted so that it can move along one of these edges.

FIG. 1 shows the proposed device, a general view; in fig. 2 - the same, section A-A of FIG. one; in fig. 3 - section bb FIG. 1, in FIG. 4 shows a section bb of FIG. one.

The device consists of a disk 1 located in a guide 2 concentrically located in relation to it. On the disk 1 there is mounted a turning head 3, consisting of a body 4, one

5 the end of which is located in the orifice of the disk 1, and a button knob 5 is mounted on the other. In the slot 4 of the housing 4, the stop 7 is pressed against it by a spring 6.

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Claims (1)

The disc 1 has a cutout 8 of an L-shape, along which mutually perpendicular edges 9 and 10 a scale is applied, a cutout 11 for drawing 366 different design elements and an aperture 12 for drawing circles of small diameter. The geometric center 13 of the disk 1 is the origin of the scale applied along the edge 14 of the cut 8. The recording device 15 is inserted into the bracket 16, which is fixed on the axis 17 in the groove 18 of the movable slider 19 and is pressed against it by a spring 20. To move the bracket 16, the groove 18 is made with an inclined surface 21 and a horizontal surface 22, and a slot 23 is made in the side wall of the groove to move the axis 17. To move the slider 19, the guide 24 is attached to the disk 1 parallel to the edge 14. Guide 2 represents sobo a semi-ring having a scale of 25 in the form of two sectors and made around the periphery with an interval of 1 slot 26 for fixing a given angular position of the disk 1 with a spring-loaded lock 27. With the beginning of the graded sections 25, risks 28, applied to disk 1 on the right and To the left of the head 3 and corresponding to its zero position, eccentrics 30 are installed in the ball bearing 29 In the ball bearing 29, which are intended to adjust it relative to the disk 1 after the latter is worn out. The guide 2 covers the top of the neck 31 from the top, the bottom of the neck 32, connected by screws 33 clamping the disk 1 in the position between the sockets 26. The device works as follows. Horizontal and vertical lines are plotted along the edges 9 and 10 of disc 1, which are mixed by hand using head 3 on the drawing board. To draw circles, center lines are plotted, the point of intersection of which aligns the edge 14 with the scale of origin. Move along the guide 24 the piglet 19 until the scale 14 is divided according to the size of the radius specified by OKpyjKKocTH. The bracket 16, which was previously located on the horizontal surface 22, is lowered on the inclined surface 21 until it touches the sheet of whatman paper 94 The latch 27 is withdrawn from the g-net 26 and is locked in this position by the abutment 7, Holding the opposite side with one hand towards the second 2, another holding the rotary knob 5, rotate the disk 1, while the writing device 15 draws a circle or an arc of a given radius. After the circle has been drawn, the bracket 16 is retracted to a horizontal position, the stop 7 is released and the latch 27 and the disk 1 return to their original position. The small diameter circle is drawn along the holes 12 in the disk 1, the inclined lines are drawn along the edges 9 or 10 when the disk 1 is turned on set the angle and fixing it .. Disk 1 can be made of lightweight sheet material, for example, aluminum or organic glass GOST 15809-7O. The diameter of the disk 1 and the guide 2 is determined based on the specific operating conditions, and may be in the range of 400 to 600 mm. Formula of the Invention and a Drawing Device containing a writing device and a template with holes for drawing circles of small diameter and a cutout located in its center with mutually perpendicular edges along which scales are applied, characterized in that in order to expand the range of tasks and to improve ease of use, it has an arcuate guide with sockets, the pattern is made in the form of a disk mounted in a guide with a possibility of rotation and has a spring-loaded lock of its angular position in going into the slots of the guide, and the cutout of the template has two intersections. the edges, which intersect at the center of the squeak, and the writing device is mounted for movement along these edges along one edge. Sources of information taken into account in the examination 1. French patent number 512304, cl. 70 e, 10/05, 1920. -4- + h- -. (- (; t. 15 bv