SU2525A1 - Instrument for measurement and drawing - Google Patents

Description

The purpose of this proposal is to connect in a single instrument a whole range of marking devices, measuring and drawing accessories, such as: rulers, T-squares, elbows, compasses, reisfedera, gauge curved surfaces, etc.

FIG. 1 assembled device is depicted in the plan; in fig. 2 - side view; in fig. 3-cross-section of the device according to the line AB of FIG. one; in fig. 4-6 the connecting bar is shown in three projections; in fig. 7- the second connector with the sight device; in fig. 8 shows a ruler in two projections; in fig. 9 — fastening fork; in fig. 10 shows a string for string tensioning, and FIG. 11 - a cross-piece.

Between the two rulers T / and TP (Fig. 1 and 8), arranged in parallel and equipped with scales, is inserted into the grooves a, and the cross with (Fig. 8 and 11) and in this position of the ruler are fastened between themselves at one end B (Fig. 1 and 7), approaching at their semicircular ends b, a, are connected from the other end by a bar P (Fig. 1 and 4), being passed through holes in g, r with their ends.

The bar P can move along the rulers and be fixed in the right place with the help of the hook D (Fig. 1 and 9) inserted into the hole d, d (Fig. 1 and 5).

In the slot E of the collar B (Fig. 7), two hairs W perpendicular to each other are stretched, and, moreover, the collar ends with the sighting edge m. The end of the bar P opposite to the bandage has the same intersecting HAIR and and the sighting edge .and/. A plumb line M is attached to the Hole B, and a bar J, perpendicular to it, is used to determine the horizontal and vertical positions of the planes.

Between the semicircular ends of the blades T / and T on the k axis there is a rotating circle A with divisions for measuring the lengths of the curves. The clamp and the bar are tightened with the help of the strings I // and Ulf / two inserts Bt and B /;

with reisfederami) and with pencils; The strings are tensioned with spikes K and 3. On the inner surface of the bar P there is a circle X, around the circumference of which a plumb-line point I is set and a protractor 0 is applied to count the angles. On the same surface of the bar there are two plug-in pads w, w, serving resmus. In addition, calibrated responses of the most frequently used shapes and sizes, used for measurements, are made in bar P.

SUBJECT OF THE PATENT.

1. Instrument for measuring and drawing, which differs by cumulative use: a) two, with divisions, lines G /, Ta with a cross C inserted between them, fixed by a collar B slid on their cylindrical ends and passed through holes bar P, installed on the rulers at the desired location along the length of the help of fork D; b) reticule holes with intersecting hairs and and: ui in clamp B and bar R; c) circle A with divisions, turning on the axis; to,. passed through the ends of the b rulers; d) plumb lines M, L; e) R / I, B redefedere attached to the clamp B and bar P between the rulers; g) several calibrated holes (Fig. 5) in bar P, two pads g, g, and also printed on this bar of circle X and protractor O.

2. In the device, indicated in paragraph 1, the use of pegs K and 3 with strings covering Refeders Bi, Bp, for attaching the latter to the clamp B and bar P.

Tshkho-lithograph Red Pechatnik, Leningrad, Leningrad, 75.

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