SU118248A1 - Slide rule - Google Patents

Description

In the well-known slide rules, made in the form of a housing and a slider with logarithmic scales of numbers and trigonometric values applied to them from the face and the circulation, and uniform scales for finding the logarithms of numbers and moving along the body of the slider with a reticule, their position of the comma is relatively significant, their digits the result of the calculations produces | C by additional calculations taking into account the provisions of the engine when performing individual actions, which reduces labor productivity and contributes to the occurrence of errors side.

In the proposed logarithmic rule, this disadvantage is eliminated by the fact that on the front side of the ruler, the logarithmic scales are aligned with the logarithmic scales of trigonometric values and uniform scales to find logarithms at three times smaller scale and their basic designation for numbers from 1 to 1000 is duplicated by several digital notation, distinguished:, imis one from another thousands of times in the direction of increasing from 1000 to 1 000 000 and in the direction of decreasing from 0.000001 to 0.001.

In order to use when counting the results of the numerical designations of the upper or lower adjacent logarithmic scale, depending on the position of the slider, on the left front end of the slider there is a double-sided arrow with a dividing sign at the top and a multiplication sign at the bottom, and at its right end - the same arrow with a reverse arrangement of dividing and multiplying signs.

The drawing shows a view of the front of the described slide rule.

The slide rule consists of a body, a slider 2 and a transparent slider 3 with a reticle 4.

No. 118248

On the front side of the case and the slider, logarithmic scales of 5 hI are plotted (Sel and on the case there are usual uniform scales for finding logarithms (not shown).

On the reverse side of the case and engine, the usual logarithmic scales of trigonometric values and logarithmic scales of numbers, as well as the usual reference tables and numbers, depending on the purpose of the ruler (the reverse side of the ruler is not shown in the drawing), are plotted.

In order to facilitate the determination of the imposition of a commanding relative to the significant digits of the calculation results, the logarithmic scales 5 on the front side of the ruler, relative to the logarithmic trigonometric values on the front of the uniform scale to find the logarithms on the front side of the body, are tripled a smaller scale - The basic digital designation of logarithmic scales 5 for numbers from 1 to 1000 is duplicated by several digital designations, which differ from each other in thousands of times. Prices range from 1,000 to 1,000,000 and downwards from 0.000 001 to 0.001.

In order to use when counting the result of numerical designations of the upper or lower adjacent logarithmic scale, depending on the position of the slider, double-sided vertical arrows are marked on the front ends of the slider 6. At the left end of the slider at the top of the arrow there is a dividing sign and at the bottom - multiplication, and at the right end these Signs are marked in reverse.

The multiplication and division of numbers on a ruler is carried out in a known manner, with the result of the calculation being calculated according to the numerical designation of the same scale on which the dividend or the first factor was set.

Since numerical designations are applied to numbers from 0.000001 to 1,000,000, in most cases no additional calculations are required to determine the position of a comma relative to significant digits in the results of calculations.

Depending on the position of the engine, the results of the calculation are read on the adjacent upper or lower logarithmic scale, for which they use arrows 6, I indicate that they choose one or another adjacent logarithmic scale of numbers.

The exponentiation and extraction of roots are usually carried out using uniform scales to find logarithms of numbers.

Subject invention

1. A logarithmic ruler, made in the form of a body and a slider with logarithmic scales of numbers and trigonometric values applied to them from the face and turnover and uniform scales for finding the logarithms of numbers and moving along the body of the slider with a reticle, which differs from determining the position of a comma with respect to the significant figures of the calculation result, placed on the front side of the ruler logarithmic scales, with respect to the logarithmic scales of trigonometric quantities and uniform scales The logarithms are found in three times smaller scale, their main digital designation for the number from 1 to SCHI is duplicated by several digital designations that differ from one another thousands of times in the direction of increasing from 1000 to 1 000000 and in the direction of decreasing - from 0, 000001 to 0.001.