Device for primary education through controlled visual representations. (Machine-translation by Google Translate, not legally binding)

摘要

Primary education procedure by means of visual representations controlled characterized by the fact that by means of a switch on luminous focuses contained in cells, the appearance on a screen of a description formed by perforation on an opaque plate is caused discriminately, which description appears illuminated at the moment that is considered timely. (Machine-translation by Google Translate, not legally binding)