SU15089A1 - Logarithmic adding machine - Google Patents

Description

The main patent J 12452 describes an arithmetic arithmometer, in which e.7 of arithmetic computation. On each one, which serves to determine the location of the sites with numbers, over which corresponding actions are performed.

In the proposed modification of the adding machine, using a counting disk consisting of a fixed base and a turntable with anti-log tables and equipped with two moving and one fixed arrow with pointers, it is necessary to simplify and simplify the production of arithmetic calculations.

In FIG. 1 shows the view of the adding machine from above; FIG. 2 - its vertical section; FIG. 3, 3-view from the side and from above of the wand D.1I of rotation of the circle, fig. 4 - view of the adding machine from the top with the arrows moved.

The proposed logarithm arithmometer is a counting disc consisting of a fixed base 1, the center of which the turntable 2 rotates. The entire plane of the log counting disc is divided into nine fields, droned in the direction opposite to the movement of the clock hands, starting from the fixed arrow A ( Fig. 1). In the same direction, the anti-log table on the turntable 2 was rewritten, starting from the same fixed arrow. In the center of the calculator on the vertical axis, two moving arrows 2 and C are rotated with the E and F pointers being moved along them, and the arrow A attached to the same axis with the pointer 7v of the crankshaft still. Two-digit numbers from 00 to 99 are shown on the outer fixed narrow circular ring. Those: ke two-digit numbers in the same direction are found on the circle of the rotating rotary disk and here they correspond to the first two digits of the mantissa logarithms of numbers; what concerns the last two digits of the mantis, indicating the order of the main and auxiliary narrow circular rings in which these factors of the poly are located.

dividers, then those are written on the arrow. Addition and subtraction of the order of rows is performed by uniform rotation of the entire turntable clockwise (when added and multiplied) and counterclockwise (subtraction or division).

Example. Add 12 and 20. Setting the arrows B С C (Fig. 1) against the terms 12 and 20 and inserting the trihedral prism stick W (Fig. 3) into the triangular hole 3 (Fug. 1 and 2) against one of the items, for example, triangular a hole against the arrow (7 (p.1 paginated 20), turning circle 2 clockwise until the stick is held up by the fixed arrow A. We find the desired amount of 32 against the arrow B (fig. 2). You can insert the stick in hole against arrow B, but then the amount of 32 should be searched against arrow C. When subtracting, turn Turn the turntable against the movement of the clock hands.

Example. Find the difference 32-20. Having established the deductible 20 against the fixed arrow A (Fig. 4), and the arrow B against the reduced 32, we turn the circle 2 against the movement of the clock hands until 05 returns to its previous position (Fig. 1). In order to avoid attention during the operation, the device on the left side is provided with an obstacle D and at that moment, when division 00 of the turntable reaches the same 00 division of the broken circular ring, the circle stops and the difference 12 is read against arrow I (fig.).

Example 1. Calculate 1,334X1,592.

Setting the arrows B and C (Fig. 1) on lines 12 and 20 and the Esf pointers against these multipliers 1.334 and 1.592, we translate one of them, in this case, the pointer E to the number 7 of the arrow B, equal to the sum ,, figures 5 2, indicated signposts E and F pa arrows B s C when

initial installation. Having inserted a prismatic stick H into the hole against arrow C, turn the circle until the stick hits an obstacle against arrow A (Fig. 4). Then against the pointer, 1 E on the number 7 of the arrow B, we read the desired work 2,123. Thus, it is possible to find in one motion not only the product of the given numbers 1,334X1,, 123, but also the sum of two-digit numbers 12 and 20, which is indicated, and their normal numbers of these multipliers. The indicated sum 32 is found against the same arrow B on the outer circular ring of the rotating circle.

Example 2 2,123: 1,592.

Having established the divider 1,592 against the pointer K (Fig. 4) of the fixed arrow A, and the pointer E the arrow B against the dividend 2,123 and performed subtraction (7-3.5) in the mind, rotate the circle against the clockwise slice until it is will be prevented by an obstacle D under the arrow A in a fixed recess. (The obstacle is indicated on the left side of the drawing and is indicated by the letter D). On fpg. 1 against ukazate. E and arrows B will find the required quotient, equal to 1.334. With one turn of the circle 2 counterclockwise, we found not only the quotient of the given numbers, but also the difference of the numbers 32 and 20, equal to 12 and searched against the arrow B on the outer fixed ring.

A detailed account of logarithmization, anti-logarithmization, exponentiation and root extraction can be found in the description of a logarithm arithmometer in the patent certificate for L 32630 dated September 25, 1928.

According to the inventor, the calculator can also be used to add and subtract four-digit numbers by many times. For this purpose, can serve two gears, fitted with such. By calculating, with one complete revolution of the circle, the first gear would make one tenth of a revolution, and with a full revolution of the last second, the gear would make one tenth of a revolution. In this way, the units of the ten decay can be read on arrow A, hundreds and thousands of on the outer ring of the rotating circle, tens of thousands of hours on the nerve toothed wheel, equipped with divisions from O to 9, and hundreds of thousands of hours on the second gear. divided into ten equal parts, with divisions also from O to 9. One of these wheels will rotate clockwise, and the other against the movement of the clock hands and through a special hole will show the corresponding divisions from O to 9.

AIG 1

The subject of the patent.

The form of the arithmometer described in patent No. 12452, characterized in that the arithmometer, made in the reader of a counting disk consisting of a fixed base 1, of a turntable 2, with anti-log tables applied on it, is equipped with three fixed on the same axis, arrows with pointers moving along them, of which two arrows J and C are rotated on the device axis and one arrow A is fixed fixedly, with teeth 3 located along the edges serving for turning circle 2.

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