Vintage USSR Slide Rule 1969s Calculator Mathematical Soviet Original Instrument

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Vintage USSR Slide Rule 1969s Calculator Mathematical Soviet Original Instrument
RULER LOGARITHMIC KLPZ
This is an iconic calculating instrument that has served
humanity faithfully for many years. The computing tool was important and necessary until the advent of calculators and personal computers.
Now in the school curriculum there is no course for studying the slide rule, except that the mention of it
in the context of the history of computing. An easy-to-use slide rule helped with complex calculations
The basis for the invention of the counting ruler was the discovery of logarithms. Yes, the principle of the slide rule is based on the fact that the multiplication and division of numbers is replaced by the addition and subtraction of their logarithms.
KLPZ was released in 1969, but is perfectly preserved. The ruler is located in the original cardboard box with a screaming inscription«KLPZ» is intended for implementation most of often meetings in practice mathematical operations:
- Multiplication
- Division
- Extraction of a square root
- Squaring
- Finding of trigonometric functions of a sine 9. Conversion values, such as currencies, distances, weight.
- Finding of trigonometric functions of a tangent
- Finding inverse trigonometric functions (of sines and tangents)
- Calculation of the area of a circle.
The is used.
Cosmetic condition: see photos,some shades in the photograph may differ from actual
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