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Individual
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Priority to ES1968143784UpriorityCriticalpatent/ES143784Y/en
Publication of ES143784UpublicationCriticalpatent/ES143784U/en
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Publication of ES143784YpublicationCriticalpatent/ES143784Y/en
Perpetual perpetuated calendar, characterized essentially because it is constituted by a box, which has a window on the front and two windows on the back face, arranged in combination with seven vertical columns which presents a number of years, which are spaced apart, arranged consecutively one place every four years, said combination comprising two internal sliding plates, one of which has on one of its faces and in thirteen columns suitably distributed numbers, of which those comprised in seven columns are visible through the previous window of the box, showing in all the movements of the sheet 31 days correlatively arranged, while the opposite face of the latter includes, also in thirteen columns, properly distributed the months of the year plus the repetition of the first two months of the year indicate that the latter must be used only in the leap years, so that in the displacements of said sheet are visible through one of the windows of the back face of the box the twelve months of the year plus the first two months of the same, while the other sheet presents one of its edges trimmed to selectively hide in its displacements the last numbers of the end of the month visible through the previous window of the box. (Machine-translation by Google Translate, not legally binding)
Perfected device for fast finding of the day of the week in which the centuries and the years corresponding to such centuries begin. (Machine-translation by Google Translate, not legally binding)