SU18634A1 - Hatching device - Google Patents

Description

The invention consists in the modification of the shading device in the drawing business, which was proposed in the main patent No. 10240. The essence of the innovation is that the device is attached to any drawing triangle, no longer on cogs, but on clamps, with the introduction an additional lever for hatching the lines alternately at different intervals and with the placement of the individual parts, which promises to maintain the parallelism of the lines being drawn even with some wear of the device.

In FIG. 1, 1 and 1 depict in three projections the lower plate of the fixture; FIG. 2, 2 and 2, too, top plate; FIG. 3 and 4 — all the fixture in two projections; FIG. 5, 5 and 5 and FIG. 6, b and b - respectively, two levers of the device (each in three projections).

On either side of the drawing triangle, the bottom gesture on plate 1 (Fig. 1.3, 4), having an eyelet 12 on top, two hook projections 13-13 and a transverse slit 10 in the middle, is securely fastened with clamps 14-14 in the lateral races 9. plate 1. is laid on the top box plate 2 (fig. 2, 3, 4) with a rectangular

cut 4, with two shaped cuts BB and with two ears in the middle 7-7; at the same time, the eyelet 12 passes into the notch 4, and the protrusions 13-13 into the notches 6-6, than when the upper plate is shifted, it is also fixed on the triangle. A lever 20 (Fig. 5) and an additional bracket lever 21 (Fig. 6) are mounted on top of the plate 2 in its ears 7 - 7, and in the ring of its bead 3 and in the eye 12 there is a screw 23 with a spring 24 (Fig. 3, 4 ).

When you press your left hand with your finger on the slot 25, the box-like plate 2 presses fixedly on the paper with its lower edges, and the hatching begins by drawing the first line along one of the free edges of the triangle. Subsequent pressing of the left hand on the lever 20 with the other finger 19, his finger 19 entering the slot 10 of the plate 1 pushes this plate away, and with it the triangle takes a step, the amount of which is adjusted by the cog 23. The second line is held in this position to paper the whole triangle, releasing nest 25 and lever 20 from pressure; under the action of the spring 24, the plate 2 is moved back, and the hatching is resumed as indicated above. At the same time, the use of the additional lever 21 allows inserting alternating lines in the bar at non-equal intervals, since pressing this lever, not close to plate 2, lever 20, takes this triangle a little smaller step (the shading is needed , for example, when shading sections of cast iron parts alternately thin and thick lines).

The subject of the patent.

1. The form of the implementation of the fixture i for shading described in patent i

No. 10240, characterized in that the bottom plate 1 is attached on the square removable by means of clamps 14, the top plate 2 is removably connected to the bottom by means of hook-shaped projections 13 in the bottom plate, threaded into the notches of the top plate.

2. The form of the implementation of the fixture indicated in paragraph 1, which is characterized by using, in addition to the lever 20, an additional bracket lever 21 (Fig. 3 - b), with the aim of obtaining, by choice, a shorter displacement of the hatching device.

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