Hello dear customers and visitors to my shop! Will I bring it to your attention. The attached (below) instruction suggests multiplying and dividing in three movements: by rotating the movable scale on the pointer, rotating the arrow to the desired value, and rotating the dial to another value.

However, it is much more interesting to use both dials, movable and fixed on the back of the ruler, and do the calculations in two movements. In this case, it is possible to obtain at once the entire range of values, simply by rotating the dial, and immediately reading the values. To do this, on a stationary dial, you need to set an arrow with either a multiplier (in the case of multiplication) or a dividend (in the case of division), and, turning the ruler, turn the moving dial to set the second multiplier on the arrow, or the divider on the pointer, and immediately read the result. Continuing to rotate the dial, we immediately read other values of the function.

An ordinary calculator cannot do this. For example, we need to convert centimeters to inches, or vice versa. To do this, by rotating the crown with a red dot, set the value of 2.54 on the stationary dial with an arrow. After that we will see how many in our 24'' centimeters monitor - by rotating the head with the black dot of the movable dial, set the value 24 on the arrow, and read the value 61 cm from the stationary pointer (2.54 24 = 60.96). At the same time, you can easily find out the opposite values, for example, we find out how many inches are in our 81 cm TV, for this, by rotating the head with a black dot of the movable dial, set the value 81 on the stationary pointer, and read the value 32 on the arrow; (812.54 = 31.8898).

Faringate degrees to Celsius degrees. On a stationary dial, set the value 1.8, subtract 32 from degrees Fahrenheit in our mind and set the resulting value opposite the stationary pointer, read the degrees Celsius on the arrow. For the reverse calculation, set the value on the arrow, and mentally add 32 to the value on the pointer. 20 1.8 + 32 = 36 + 32 = 68. (100-32) /1.8 = 681.8 = 37.8 (37.7778). We set the value 1.6 on a fixed scale, by rotating the movable scale we get miles in kilometers or kilometers in miles. Let's calculate the speed of acceleration of the time machine in the movie "Back to the Future": 88 1.6 = 141 km / h (140.8). Time and distance from speed.To find out how long it will take to drive 400 kilometers at a speed of 60 km / h, set the value 6 on the fixed dial, and turn the movable dial to 4, we get 6.66 hours (6 hours 40 minutes). Bargaining is possible for many positions, as well as counter offers.

In my store there are many interesting things you will like do not pass by I make big discounts on any product. Thank you for your attention to my lots, dear buyers, collectors and lovers of antiquity! In my shop you can find various objects from antiquities to more recent things. Perhaps it is in my shop that you will find what you were looking for and become a regular customer, receiving discounts and bonuses.

Due to lighting effect and computer color, the actual colors maybe slightly different from the picture. The item "NEW Logarithmic Ruler KL-1 Soviet Circular Slide Rule Calculator USSR documents" is in sale since Saturday, September 11, 2021. This item is in the category "Collectibles\Science & Medicine (1930-Now)\Engineering\Slide Rules".antikvara" and is located in 65114.

This item can be shipped worldwide.

- Modified Item: No
- Country/Region of Manufacture: Russian Federation
- Featured Refinements: Circular Slide Rule

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