JPS6184717A - Scaling device attached to abacus - Google Patents

Abstract

PURPOSE:To scale rapidly and to improve calculation speed by installing three kinds of keys such as digit keys attached to an abacus frame and displaying a scaling point at the position in accordance with a calculation speed. CONSTITUTION:A scaling device is composed of an operation part B attached to the side part of a frame 1 of an abacus A, and a display part C to display scaling point 2 fitted to lower longitudinal part of the frame 1. The operating part B is equipped with the function to indicate a shift direction and the number of shift digits for a base point of the scaling point 2 of the display part C, and has three kinds of keys of an item selecting key 3, a digit key 4 and a return key 5. For this reason, for example, when in multiplication, a multiplier is two digits and 2 of the digit key 4 is pushed, the scaling point 2 of the display part C is displayed a the position where the point is shifted by (number of digits of multiplier + 1) digits and (three digits) only in the right direction from the base point. Thus, the scaling can be executed by one touch operation without occurrence of errors. When the return key 5 is pushed down, the scaling point 2 can be returned to the original base point.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a scale device mounted on an abacus that can quickly scale scales without making errors during multiplication or division. It is something.

(Prior art) Conventionally, when performing multiplication or division on an abacus, the scale is determined by reading the number of digits of the multiplier or divisor, and adjusting the scale according to the number of digits of the multiplier or divisor in the front side of the frame of the abacus. Calculations are performed by holding the γ position with a friend's index finger. Therefore, it takes some time to press the scale point with your index finger, and
There is a problem in that calculations must be made while holding the scale point with the index finger, and beginners are likely to make mistakes in the scale.

Also, for example, 31.42 (multiplicand) x 213.

When multiplying by 7 (multiplier), the scale point is a position moved from the base point to the right (the number of digits of the multiplier + 1). In this way, in the case of multiplication, there is a similar problem in that the scale point is not the position moved from the base point to the right by the number of digits of the multiplier, but the position moved by the number of digits of the multiplier + 1. However, if the multiplier is less than or equal to 1, it becomes even more troublesome. This point also applies to division. Here, the "base point" is
Of the many dots placed every three digits on the abacus beam,
This term refers to a ``specific point'' when setting a multiplicand or dividend based on a ``specific point,'' and is used hereinafter with the same meaning.

On the other hand, when placing numerical values during the calculation of quotations or slip calculations, or when reading the calculation results, the position of the base point may be mistaken due to carelessness.

(Problems to be Solved by the Invention) In view of the above-mentioned problems, the main purpose of the present invention is to quickly calculate the scale with one touch and without making an error when performing multiplication or division on an abacus. It has been done.

(Means for Solving the Problems) The scale device attached to the abacus according to the present invention includes an operation section attached to the side of the frame of the abacus, and an operation section attached to the front longitudinal section of the frame, or a scale device attached to the frame of the abacus. It consists of a display part that is directly built into the front longitudinal part or the beam to display the scale point, and the operation part has an item selection key for selecting calculation items such as multiplication and division; Equipped with at least three types of keys: a digit key for inputting the number of digits; and a return key for returning the scale point on the display to the base point. The scale point is displayed at a predetermined position according to the calculation.

(Function) When performing multiplication or division, press one of the item selection keys and then press the digit key corresponding to the number of digits of the multiplier or divisor. The display will show the number of digits from the base point. A scale point is displayed at a position moved by the number of digits determined by the digit key in the direction determined by the event selection key, and scale is performed.

(Example) As shown in FIG. 1(b), the scale device according to the present invention includes an operating part B attached to the side of the frame 1 of the abacus A, and a longitudinal part on the front side of the frame 1 of the abacus A. and a display section C for displaying the scale point 2 by attaching it to the section.

The operation section B has the function of instructing the direction of movement of the scale point 2 of the display section C with respect to the base point and the number of digits to be moved, and is composed of an electronic circuit similar to that of a known hand-held calculator. The display section C displays scale point 2 using a liquid crystal display.

The operation section B has three types of keys: an event selection key 3, a digit key 4, and a return key 5. Event selection key 3 is
This is for selecting the type of calculation such as multiplication, division, quotation, or slip calculation. When the multiplication key is pressed, scale point 2 on display section C moves to the right with respect to the base point, and Pressing the division key moves in the opposite direction. Also, if you press the key for addition/subtraction when performing quotation or slip calculation, the scale point 2 will not move and will remain displayed at the base point, and the scale point 3 will remain displayed at the base point.
A comma is displayed between each digit.

In addition, the digit keys 4 are used when performing multiplication or division, and are made up of a number of keys corresponding to the number of digits of the multiplier or divisor, so that they can also be used when the multiplier or divisor is less than 1. be. For example, in multiplication, if the multiplier is 2 digits, when you press (2) of digit key 4, scale point 2 on display section C will move from the base point to the right (number of digits of multiplier + 1) digits = 3 digits. If the multiplier is a number less than or equal to 1 starting from the third decimal place, press Digit Key 4-5.
When you press , scale point 2 is displayed at a position moved one digit to the left from the base point. Division is the same as multiplication except that the moving direction of scale point 2 is reversed.

Further, when the return key 5 is pressed, the scale point 2 returns to the base point.

The following explanation will be based on specific numerical values. In Fig. 1, when performing multiplication by 6.72 (multiplicand) x 65, 2 (multiplier), the multiplicand is placed based on the base point, and the multiplication of operation part B is performed. After pressing the item selection key 3 for , press the digit key 4 (2) corresponding to the number of digits of the multiplier, the scale point 2 on the display will be
As shown in Figure 1 (b), the scale is displayed at a position moved three digits to the right from the base point, and if the specified calculation is performed as is, the result will be as shown in Figure 1 (c). The calculation results are displayed, making it extremely easy to read the calculation results including scale.

Also, as shown in Figure 2, when performing multiplication by 16.22 (multiplicand) Xo and 0016 (multiplier), after pressing the multiplication item selection key 3, press the 5-color digit key 4. When pressed, the scale point on the display section C is displayed at a position shifted one digit to the left from the base point.

On the other hand, as shown in Figure 3, 125 (dividend) = 1
09 (divisor), press the item selection key 3 for division, then press the digit key 4 according to the number of digits of the divisor.
When you press , scale point 2 on display section C moves 4 points to the left from the base point.
Displayed at the position shifted by digit. Furthermore, as shown in Fig. 4, when performing the division of 0.105 (dividend) = 0.025 (divisor), after pressing the division item selection key 3, press the digit key 4 corresponding to the divisor. When you press the button, scale point 2 on display section C remains displayed at the base point,
The scale is taken.

Furthermore, when performing a quotation or a slip calculation, as shown in Fig. 5, if the item selection key 3 for addition/subtraction on the operation section B is pressed, the scale point 2 remains displayed at the base point. At the same time, commas 6 are displayed every three digits from the base point to the left, making calculations extremely easy and eliminating the possibility of misplacing the number 1 or misreading the calculation results. 4. Furthermore, the display section using a liquid crystal display may be directly incorporated into the front longitudinal part of the frame 1 of the abacus or the beam 7.

(Effects) (1) When performing multiplication or division, by operating the digit keys in the item selection key group on the operation panel, you can quickly calculate the value with one touch and without making any errors. At the same time, calculation speed is improved because it is no longer necessary to perform calculations while holding the scale point with the index finger as in the past.

(2) When calculating estimates or slips, by pressing the digit key for addition/subtraction on the operation panel, the scale point will remain displayed at the base point, and commas will be displayed every 3 digits to the left from the base point. is displayed, making calculations extremely easy, and
No more misplacing numerical values or misreading calculation results.

[Brief explanation of drawings]

Figure 1 (A) is a diagram showing the order of key operations when performing multiplication, and Figure 1 (B) is a diagram showing the plane after completion of scale when performing multiplication using an abacus equipped with the scale device according to the present invention. Figure 2 (c) is a partial plan view of the state in which the calculation result is read, Figure 2 (a) is a diagram showing the order of key operations when performing another multiplication, and figure 2 (b) is a partial plan view of the state in which the calculation result is read. FIG. 3 (a) is a partial plan view of the state, and FIG. 3 (b) is a diagram showing the order of key operations when performing division; FIG. , a diagram showing the order of key operations when performing another division; FIG. FIG. (Explanation of symbols of main parts) A: Abacus B: Operation section C: Display section 1: Frame 2: Scale point 3: Item selection key 4: Digit key - 5: Return key 6: Con muff ： は りFigure 2 (A) (B) +c2 Figure 3 (A) (B) C1 Figure 4 (A) (B) Figure 5

Claims (1)

[Claims] It consists of an operating part that is attached to the side of the frame of the abacus, and a display part that is attached to the longitudinal part of the front side of the frame or directly integrated into the longitudinal part of the front side of the frame or the beam to display the scale points. , the operation section includes an item selection key for selecting a calculation item such as multiplication or division; a digit key for inputting the number of digits of a multiplier or divisor; and a return key for returning the scale point of the display section to the base point. Equipped with at least 3 types of keys,
A scale device attached to an abacus, configured to display scale points on a display section at predetermined positions according to calculations by operating an item selection key and a digit key on an operation section.