SU15909A1 - Tutorial for learning how to multiply - Google Patents

Description

Arranging each row of holes of digital buttons in a drawer with holes, which are connected to a lever mechanism that serves to push the buttons of the plates suspended from the cover of the gun and pulled by rubber threads, is meant to get a training manual for thorough teaching of multiplication. , for which the plates are written the product of numbers printed on the corresponding buttons ...

In FIG. 1 shows the top view of the stitch; FIG. 2 and 3-transverse and longitudinal sections of it.

Inside the box with horizontal and vertical rows of holes J., plates P are suspended in such a way that when the buttons B Z C are pressed against the holes, they move upwards and lie on the holes, closing them. In order for the plates to always be in an upright position and not wobble, they are pulled off by rubber threads D, D. All buttons are divided into two groups: auxiliary — from ten red buttons leading the plate from the vertical position, and pushing — from ten green buttons. The lever mechanism consists of perpendicular to each other levers Q and D whose short shoulders are connected to the colored buttons. The long arm of the lever Q for passing the levers 8 is curved in the form of knees N and has pushes on it (Fig. 2), which, when pressed on one of the D buttons, bring all the plates of the row into an inclined position, while my lever arm 8 bears the pushers t, which press, when pressing one of the buttons B, plate G to the holes A.

The subject of the patent.

A manual for learning how to multiply with the use of a box, on the lid of which there are horizontal and vertical holes, characterized by the fact that, in front of each row of holes, there are numerical pushbuttons B in B (Fig. 1-3) connected to a lever mechanism for lifting, when pressing the buttons, the plates G suspended from the lid of the box and tread rubber D and to install them iodine with the corresponding hole A, on which the plates are written the numbers printed on the corresponding x buttons, which mechanism consists of levers Q and 8 levers perpendicular to each other inside the case (Fig. 2 and 3), the short arms of which are connected to the said buttons, the same length as the Q lever having

Yelena N for passing the arms S, is provided with pushers 3 (Fig. 2), serving, when pressing the button B, to bring all the plates in a row to the upper half of the pole, while the long arm of the lever 8 is equipped with pushers, serving, by pressing button B to press plates G onto holes A,