RARE Vintage Soviet Calibr USSR Slide rule Moscow circular Logarithmic round 60s

Description: ello dear friends! Please see my lots. If you have any questions please contact me. I will be glad to help you!USSR Engineer Logarithmic Mathematical Circular Slide Rule Moscow Calculator 60s. Ruler in vintage condition,have traces of age, stains, scratches , chips and dents. Moscow DESCRIPTION OF THE LINE Of considerable interest to calculators is the Sputnik logarithmic disk, manufactured by the Moscow Caliber>> plant, designed, like a normal counting slide rule, for various calculations. The logarithmic disk, the scales of which are built according to the principle of a continuous (closed) logarithmic circle, consists of an adjusting ring 1, a body 2, a disk-engine 3; it has on both sides two transparent sighting discs-sliders 4. All parts of the "Satellite>> have the same purpose as the corresponding parts of the normal ruler. On the body of the front side of the Sputnik>> line are applied: the main scale of numbers (D) 5, the scale of square numbers (A) 6 and the scale of cubes of numbers (k) 7. On the front side of the engine are the main scale of numbers (C) 8 and the scale of inverse numbers (R) 9. On the reverse side of the ruler case are applied: the tangent scale (T) 10, the scale of tangents And sines of small angles (SuT) 11 and the scale of sines (S) 12, and on the engine - the scale of the mantissa of logarithms (L) 13 and main scale of numbers (E) 14. On the "Satellite>>" ruler, three identical main scales (C, D and E) are logarithmic. Each of them represents a logarithmic scale of numbers 1, 2, ..., 9,1 (the number 1, in addition to the signature, is provided with a narrow dash). Here, inside the interval (1-2), the numbers 1.1 are given; 1.2; ...; 1.8; 1.9; 2. the spaces between which are divided into five divisions. The price of the smallest division is 0.02 of the ruler interval (1-2). The following scale intervals (2-3), (3-4) and (4-5) are each divided into 20 parts with the value of the smallest division of 0.05. On this part of the scale, each even division (0.1 interval) is marked with a slightly longer stroke. The spaces between strokes, marked 5, 6, 7, 8, 9, 1, are each divided into 10 parts; the middle of such a gap (the fifth stroke) is marked with an elongated line. On the main scales of the ruler disk, the constants T= P"=206 265" are marked with special strokes. = 3.14; c = √/4 : p;p'=3438'; With small dimensions (diameter 7.2 cm, thickness 0.5 cm and weight 40 g), the Sputnik slide disc is somewhat more portable than small slide rules 12.5 cm long. The Sputnik scoring ruler provides more accurate results compared to a small a ruler, since the scales of this ruler, except for the scales of reciprocals R and the mantissas of logarithms L, are longer than the corresponding scales of a small logarithmic ruler.Functions: 1. squaring numbers 2. squaring, 3. extracting the square root 4. extracting the cube root 5. using the scale of reciprocals 6. multiplication of numbers 7. number division 8. calculation of trigonometric functions 9. application of the mantissa scale 10. combined multiplication and division, calculation using the reciprocal scale Please see the photo is what you get. We ship to worldwide. Delivery by registered airmail from Uzbekistan 1-3 working days after receipt of payment. Delivery from Uzbekistan is 2-8 weeks to any country. I send goods only by registered mail.All parcels are tracked. We give you the track number and attach a photo invoice about the payment in the postal offise.

Price: 175 USD

Location: Tashkent

End Time: 2024-04-14T12:24:59.000Z

Shipping Cost: 26.5 USD