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LL-JIJ @Www II\ N 0 M 0 D E M 2 S H E E T S S H E E T 2 (No Model.) 2 Sheets-Sheet 1. H. FITCH. i _LL-JIJ @www II\ N 0 M 0 d e M 2 S h e e t s _ S h e e t 2. H n... T.. T C H CALENDAR. No. 458,970. Patented Sept. l, 1891. l A we nonms rinus ce., mom-uwe.. wnsumawu. o. c. UNITED STATES PATENT OFFICE. HENRY FITCH, OF LAVVRENCEBURG, INDIANA, ASSIGNOR TO ISAAC K. FUNK AND ADAM IV. IVAGNALLS, OF NEÑV YORK, N. Y. CALENDAR. SPECIFICATION forming part of Letters Patent No. 458,970, dated September 1, 1891. Application ñled April 3,1891. Serial No. 387,510. (No model.) To @ZZ whom it may concern. have two common calendars-viz., the old Be it known that I, HENRY FITCH, a citizen style or Julian calendar and the new style or of the United States, residing at Lawrence Gregorian-yet for all purposes of a general burg, in the county of Dearborn, State of In calendar there are in reality but two classes- 55 5 diana, have invented certain new and useful lirst, those years which are termed “ordinary” Improvements in Calendars; and Ihereby de years, which contain fifty-two (52) full weeks clare the following to be a full, clear, and ex and a day and in which the year begins and act description of the same, reference being ends on the same day of the week, and, sec had to the accompanying drawings, wherein ond, those years termed “leap years,” which 6o ro Figure l is a view of a set of annual calen contain an extra day and end on the day of dars, seven in number, adapted for the ordi the week succeeding that on which they com nary years, each calendar commencing with menced. It therefore follows that a series of a different day of the week. Fig. 2 is a simi annual calendars composed of two sets of seven lar view of a set of annual calendars, seven each-that is, two sets, one for the ordinary 6; I 5 in number, adapted for leap-years, each calen years and one for the leap or eXtra-day years, dar commencing with a diiïerent day of the the separate calendars of each set commenc Week; and Fig. 3 is aview of an index wherein ing with a different day of the week-*must con there is placed opposite each year a symbol tain one calendar appropriate for any given indicating the annual calendar for use in de year, whether Julian or Gregorian. -' 7o zo termining or ascertaining any date of said My invention therefore, generally stated, year. consists, first, in a general year-index wherein Like symbols refer to like matters wherever opposite each year is placed a symbol indica they occur. tive of the character of the year (whether My invention relates to that class of calen ordinary or leap year) and the day of the 75 2 5 dars intended for use throughout a series of week on which the year commenced or will years or for determining or ascertaining the commence, (as the case may be,) whereby ref day of the week on which any date will fall erence may be readily made to any annual or has fallen, commonly termed “perpetual calendar which has the given characteristics, calendars.” This class of calendars as here and, secondly, in the combination, with a se- 8o 30 tofore commonly constructed have either ne ries of annual calendars composed of two cessitated the use of an unsightly and un» sets, the calendars in each set commencing usual arrangement of dates in transverse and with a different day of the week and having vertical columns, calculated to confuse the or distinctive symbols, of a year-index wherein dinary user, and thus lead to error, or else opposite each year is placed the symbol corrc- 8 5 3 5 have been constructed with shifting week spending with the annual calendar adapted days and year indicators requiring manipula to the said year. ‘ tion from time to time, and therefore subject I will now proceed to describe my inven to error from lack of proper adjustment or tion more specifically, so that othersl skilled from accidental displacement of the slides. in the art to which it appertains may apply 9c 4o The object of my present invention is the the same. production of a simple and efñcient calendar In Figure l of the drawings are shown sufii of the class above speciñed which shall pre cient of each of a set of annual calendars for sent no unusual or irregular arrangement of ordinary years to clearly indicate the char* dates or general complicated appearance to acter of each calendar, so that others skilled 9 5 45 confuse the unscientific user and which shall in the art can produce the calendar. Said not contain shifting or adjustable parts liable calendars are shown in their order of arrange to be displaced, and thus lead to error. W`hile ment, one for each day of the week with which in the calculation of time down to the present the year commences, and the whole set (for era years of different lengths have been used ordinary years) is indicated by the letter a, ICO 5o and the errors arisinO~ have been corrected by to which is added the number corresponding the elimination of days or periods, so that we to the day of the week, so that n.' indicates 458,970 the annual calendar wherein theyear ccm referring to that calendar of the hereinbefore ' mences and ends on Sunday, or the first day specified series, which is the correct calendar of the week. ctzindicates the calendar where for the given year, all as clearly shown in the in the year commences and ends on Monday, drawings. ` ' or the second day of the week, and so on, a3 In using the calendar hereinbefore de c4 a5 a“ a7 corresponding to the respective scribed in order to ascertain the day of the days of the Week on which the several calen week upon which any given date will fall in dars begin and end. l any given year all that is necessary is to first 75 In Fig. 2 of the drawings are in like man find the year in its position on the index, Fig. 3, IO ner representeda set of calendars correspond then note the symbol placed opposite said year ing to leap-years, also arranged in their order in the parallel column, which symbol will indi of daily succession, the class as awhole indi cate the correct calendar of the series for said cated by the letter B and the separate calen year, and in the'calendar thus indicated theV dars indicated by adding the number corre given date willbefound under its properweek sponding to the day of the week on which the dayheading. Forinstance,itisknownthat the calendar commences. Thus B’ indicates the siege of Jerusalem ended on July 13, A. D. 70. calendar for leap-year commencing on Sun On examining theheadings of the index, Fig. 3, day, B2 that commencing on Monday, and so we find that the year 70 of the first century 85 on, B3 B4 B5 B6 B7 to the calendar commenc falls in the same column with the eighth and ing on Saturday. In addition to the ordinary fifteenth centuries, and the proper calendar calendar there may, if desired, be marked or therefor is the same as for the corresponding printed on the margin of each annual calen year of the eighth and fifteenth centuries, or, dar the years to which said calendar is appli in other words, is the same calender as for the 90 cable, as shown at the left hand of the draw year 14:70, which is indicated by the symbol 25 ings, Figs. 1 and 2, and while this is of some d2. On turning to the calendar marked co2 we Value in assuring the user of the correctness find that July 13 falls on Friday, and thus of his selection, yet it is not a material fea ascertain that July 13, A. D. 70, on which ture of the present invention. the siege of Jerusalem ended, was Friday. As In Fig. 3 is illustrated an index to be used a second illustration of the use of the herein in conjunction with the annual calendars described calendar, take the inauguration of herein specified or their equivalents. Said President Benjamin I-Iarrison, March 4, 1889. index may commence with any given year and On examining the index, Fig. 3, we find in the terminate with any given year, though for parallel column opposite that year the symbol IOL purposes of convenience, and, as fully illus a3, and on referring to the calendar marked 35 trating the principle involved, I have conn-V a3 we iind that March ¿I fell on Monday. menced with the year 1101 (twelfth century) In constructing the calendar I prefer, for and ended with 2000, (twentieth century,) and sake of clearness, to use red or an equivalent’ have double-lined (transversely) the column bright color for the symbols referring to the 105 headings and arranged therein at the proper old style (or prior to 1583) and black for the places the remaining centuries from the first symbols referring to the new style, (or for 1583 (O. S.) to the twenty-eighth, (N. S.,) adding a and later,) especially if both old and new third column at the year 1583 where the new style references are retained after 1583 5 but style or Gregorian calendar commences.
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