PROCESSES AND DEVICES FOR PERFORMING ARITHMETIC OPERATIONS BASED ON THE PRINCIPLE OF ELECTRONIC COMPUTER AND AIDED BY IT

摘要

Processes and devices for performing arithmetic operations in the sense and with the function of an electronic calculator, in which the digits are automatically limited to a given number, without manual instruction input, the input of the numbers being either manual or automated. The processes and devices can be used both independently and for preliminary processing with a connected electronic data processing system. In addition to automated limitation of the number of digits, the types of operation are associated in a simplified manner with the numbers, partly by storing a series and by combination, and partly automatically without operating a key for a particular type of operation. A given type of operation is associated with a direction of motion during inputting of the digits by means of a character recognition device, for example addition being input from left to right and subtraction from right to left. The relevant subsets of a set of numbers in written form are determined during reading by a character recognition device by means of a reading range of adjustable size or, in the case of fixed reading range, by means of processes in the processing process as well as by means of the input of a direction for the combination of individual numbers in the set of numbers. In a preferred embodiment, addition or reading of a column of numbers is performed by a character recognition device by joining a single recording movement in the vertical direction by means of a horizontal reading range with a multiplicative association of the operating mode addition, either fully automatically or by a single actuation of the addition operating key.