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Individual
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Individual
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Priority to ES0020144UpriorityCriticalpatent/ES20144Y/en
Publication of ES20144UpublicationCriticalpatent/ES20144U/en
Application grantedgrantedCritical
Publication of ES20144YpublicationCriticalpatent/ES20144Y/en
A perpetual calendar, consisting essentially of a base plate that has two concentric circular crowns, each divided into twenty-eight radial and equal parts, the outer corresponding to the indication of years, and the interior corresponding to four groups of the seven days of the week , being coupled to this base plate and its center, in a rotating disk of equal or smaller diameter to the interior of the peripheral crown of the base, whose disc has a sector comprising seven divisions of the base, divided in turn into seven radial parts equal, and in five circular zones, forming a grid in which the thirty-one days of the month are indicated, and oppositely other seven divisions, corresponding also to seven divisions of the base, in whose zones the months of the year are indicated, presenting also this disk an opening in the form of a circular crown corresponding to the sector of the days of the month at the height of the circular ring ior of the base plate and comprising seven of the divisions of this crown. (Machine-translation by Google Translate, not legally binding)