Perfected electronic device for teaching. (Machine-translation by Google Translate, not legally binding)

摘要

Electronic device perfected for teaching which includes a printed sheet that carries at least one question and '' for each question a group of marked areas, indicating each zone of. This group. A different answer to the question, a silver destined to be located behind, of the printed sheet and supporting a plurality of separate areas: conductive of electricity, so that when the sheet and the plate are located in correspondence, each zone of the sheet indicating a correct answer is betting on a conductive zone that the areas of the sheet indicating the incorrect answers are betting on at least one different conductive zone, means for applying to any one of the various conductive zones electrical signals that they would periodically appear as a function of time and, that they can be separated in a receiver and are capable of producing, from the conductive zones, a radiation of corresponding electromagnetic waves that can be detected in the front of the sheet by a sensor located in a position adjacent to an area marked on it, an electromagnetic wave collector, and a receiver connected to the apt for the identification of the waves detected by the sensor, which includes signaling devices to indicate, if the answer chosen, by means of the juxtaposition of the sensor with the marked area, is correct or not. (Machine-translation by Google Translate, not legally binding)