Сomputing Logarithmic Сylinder

Date of appearance: 1910
Made in: Moscow, Russian Empire (now Russia
Dimensions: 35 × 175 mm
Weight: 112 g
Materials: wood
Tags: russiamakes, рдс, россияделаетсама, политех, polytech

In 1909, for the first time in the history of Russia, Alexander Shchukarev, Assistant Professor of Moscow State University implemented the idea of a cylindrical slide-rule with a spiral scale, thus creating a new original instrument of great precision and small size. The logarithmic 10-meter scale is applied to a wooden cylinder (17 cm long and 3.5 cm in diameter). The transparent celluloid cylinder serves as a support for the three ring-shaped movable pointers. By moving the parts one can perform a series of multiplications and divisions without registering intermediate results. The calculation of complex formulas can be performed with a speed not available to mechanical counting devices such as adding machines. The device provides accuracy of up to five characters. The invention never saw mass production. Only the inventor's model survived to this day.

Сomputing Logarithmic Сylinder