ES9184U - Perpetual calendar. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

A perpetual calendar essentially constituted by three sheets in which they appear in properly established columns, correlative numbers from top to bottom and differentiated from each column to the next in seven units, one of said sheets corresponding to the current month in each case, another to the week or week and fraction that precedes the month itself and that is established to the left of the first and the last that corresponds to the week or week and fraction that follows that month and that is established to the right of it; and these three sheets are mounted on the back of a plate in which there is a window through which seven horizontal rows of numbers of them are visible, each of which corresponds to a day of the week whose annotation appears on one or both sides of the aforementioned window and arranged the set in this form and counting the aforementioned sheets with means to move from top to bottom and vice versa, it is enough to move the central sheet that is the current month until the number 1, from the first column on the left, coincides horizontally with the day of the week in which the month begins and then the leaf on the left is run so that its second column, which is established precisely below the first of the central leaf , presents above the number 1, of the one of the last day of the previous month and finally the sheet of the right is displaced whose two columns run over the two columns also of the right take the central sheet so that the number 1, of this sheet is located after the last day of the current month, which indicates the repeated central sheet. (Machine-translation by Google Translate, not legally binding)