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The finest objects brought to you by {name}

Francisco Álvarez

Producer: Moscow experimental plant of control devices "Kontrolprilad" (Moscow, USSR).

The circular slide rule “KL-1” is designed to perform the most common mathematical operations in practice: multiplication, division, combining operations, squaring, extracting square roots, finding trigonometric functions of sine and tangent, as well as corresponding inverse trigonometric operations. functions that calculate the area of ​​a circle.
A slide rule consists of a body with two heads, two dials, one of which is rotated by a black dot head, and two hands, which are rotated by a red dot head. Opposite the crown with a black dot above the movable dial is a fixed pointer.
There are 2 scales on the movable dial: the internal - main - counting scale and the external - scale of squares of numbers.
There are 3 scales on the fixed dial: the outer scale is a counting scale, similar to the inner scale on the movable dial, the middle scale is “S”-values ​​of angles for counting their sines, and the inner scale is “T”-values ​​of angles for counting their tangents.

The diameter of the ruler is 5 centimeters.
The box is damaged.

I guarantee safe delivery with tracking.

USSR - 1960-1991

Circular logarithmic ruler "KL-1" - In the original box. USSR. - Alloy

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Circular logarithmic ruler "KL-1" - In the original box. USSR. - Alloy

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Home & Garden Decor

This object is no longer available, but there’s still lots to explore

Circular logarithmic ruler "KL-1" - In the original box. USSR. - Alloy

Popular in Home & Garden Decor

4932 objects

Related collections