SU27495A1 - Counting line - Google Patents

Description

To the author's testimony of A. A. Pokrovsky, dated September 29, 1930 (for reference. Certificate. No. 76795).

On the issuance of copyright certificate published August 31, 1932.

The counting ruler device shown in the drawing for calculating the values of various mathematical expressions is due to the image of both the logarithmic line for numbers and other lines representing the functional dependencies of any quantities (sine lines, tangents, inertia moments, resistance, etc.) - in the rectangular coordinate system in such a way that they are all plotted on a narrow plane in parts with their own at various scales along the x-axis, which coincides with the long side of the ruler. Its short side serves as an axis of ordinates with a constant scale for each kind of lines and in such a way that each point on the ordinate combines several values depending on how many parts of the line (for example, logarithmic) are divided by its own image. In addition, the countable ruler is also equipped with a slider C with a scale of TP, bearing on it all the values of the ordinates along which the line segments are constructed. Thus, the working face of the slider (for example, TP) represents the moving axis of ordinates in a copy.

The operation with a ruler is performed as follows: each segment, for example, of a logarithmic line, corresponds to a certain defined interval of numbers; Thus, in the drawing, the fourth segment on the left, indicated by the sign 2, is constructed for numbers from 25 to 30 by the mantissas of brig logarithms completely deferred at different scales along the long side of the ruler (abscissa axis).

Consequently, the movable scale C is set so that it will cross its working edge t /; (or a hair) segment 2, will be sighted by a number, the first digit of which is 2, and the second - more than 5; then, on the moving scale, the second digit must be searched for, starting from the bottom to the point of intersection, starting from 5 (by numbers or by any other signs).

The third digit of the number is also determined by the moving scale, if the distance between two adjacent integer digits on it is divided by 10.

The use of a vernier on a moving scale makes it possible to sight the fourth digit of a number, if this is not achieved by the choice of scales.

If, however, the scales for building a ruler are chosen so that a sufficient division of the line into sections allows the fourth figure to be determined, then the specified nonius will assist in finding the fifth figure of the sighted number.

All calculations are performed based on the rules of logarithmization, and the action of the ruler is to find the proper intersection point of the line segments with the corresponding working face of the reticle ./

As regards the sighting of the functional dependencies of the quantities (for example, angles and their sines and tangents, etc.), their lines are constructed by adding different values to the divisions on the fixed and movable scales; here and here, the more values are attached to each point on the moving scale C, the greater the

nosti can be achieved when sighting.

The subject matter of the invention.

A counting line provided with a plotted on it and a runner, wherein the slider C is provided with a uniform m / i scale, which serves to count the ordinate curves representing the functional dependencies of various quantities and plotted in rectangular coordinates on the surface of the ruler in parts different scales, on the x-axis, which coincides with the length of the ruler, with a uniform scale of the ordinates, coinciding with the width of the ruler.