SU916347A1 - Drawing appliance - Google Patents

Description

The invention relates to drawing devices and is intended for shading in the drawings.

Known drawing device consisting of a United swivel head, mutually perpendicular rulers and a mechanism for hatching with the hatching pitch regulator [1).

The disadvantage of the known device is some inconvenience in use, caused by the cumbersome mechanism for shading.

The purpose of the invention is to improve the usability.

This goal is achieved by the fact that in the drawing device, the mechanism for shading has a triangle and means for moving the triangle relative to one of the rulers, consisting of an attached to the ruler casing, rollers in it, a hollow sleeve mounted on the casing, coaxial spring-loaded bushings located in it, Levers interacting with them, pivotally connected by means of plastics and a flexible element, covering the rollers and passing through the sleeve, while the triangle is fixed on the flexible element, while the free

2

The ends of the two-arm and arm are connected to the swivel head.

5 Figure 1 shows a drawing

device, general view; figure 2 - section aa in figure 1; in fig. 3 - node 1 in figure 1; figure 4 - node 11 in figure 1.

U Drawing device consists of

mutually perpendicular 'lines 1 and 2 connected with the swivel head 3, the casing 4 attached to one IE ruler, the triangle 5 connected to the flexible element 6, the rollers 7 installed in the casing connected to the casing of the hollow sleeve 8, in which four are aligned sleeves 9, levers 10 installed between the outermost pairs of sleeves and interacting with them, springs 11 placed between the inner sleeves and carrying out the power closure of the sleeves with each other pivotally connected to the levers of the thrusters 12, the free ends of which are nstehna 13 and two shoulders lever 14 are connected with a swivel head, knobs 15 and 16, which regulate the step of hatching the sleeves 17 attached to the hollow

30 sleeve at its ends, and means

916347

the tension of the flexible element 18, placed in the place of attachment of the triangle to the flexible element.

With the device work as follows

in a way.

Bushings 17 install step 5

shading · and depending on the direction of movement of the square 5, press one of the handles 15 or 16. At the same time one of the levers 10, turning wedges the flexible element 6 10

between the sleeves 9 and moves it with an angle 5 on the size of the stroke step. After the square has moved by a predetermined amount, the handle is released, the lever under the action of the 5th spring of the spring 11 occupies the original position.

Claims (1)

Claims 20 Drawing device, consisting of connected swivel head, inter-perpendicular rulers and shading mechanism with regulator 25 shading steps, characterized in that, in order to improve usability, the shading mechanism has a triangle and means for moving the triangle relative to one of the rulers, consisting of a casing attached to the ruler, rollers, and a hollow sleeve mounted on it the casing, coaxial spring-loaded bushings located therein, levers interacting with them, pivotally connected by means of rods and a flexible element covering the rollers and passing through the bushings, while the triangle is fixed on the flexible element, and the free ends of the two-arm arm and bracket are connected with a swivel head.