ES10659U - Pocket calculating device. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

A pocket calculating device, characterized by the fact that both its board, or frame, and its moving organs are flat: resolving itself by means of a flat case on whose upper face in its central part the holes of the results appear, and above and below a series of grooves for the operation of the moving parts. These, are inside the case, are guided by a few stops, and are resolved by sliding rules, in whose central part appear in column the figures from zero to nine that match the central holes of the board will acknowledge the results; On their left, these runners have an alignment of equal holes in their upper prolongation, above the column of numbers; a series of teeth at the height of these numbers, and another series of holes in the lower prolongation of the slide, below those mentioned numbers. The steps or spaces from center to center of these circles or teeth are all equal to each other and to the distances from center to center of the numbers. Likewise, each rule presents on its right another series of teeth also equal to each other and to the previous ones in its central part. The edges of the teeth on the right and left of the slide are painted one color, and those of the circles to another. The column of numbers is centered with the holes in the results. And the teeth and lateral circles with the upper and lower slots to which side are arranged as many columns of equally spaced numbers for the data. (Machine-translation by Google Translate, not legally binding)