GB2183372A - Perpetual monthly calendar - Google Patents

Abstract

A calendar comprising a tabulation of years (10) spanning AD1 to infinity in accordance with the repetitive nature of the yearly spread of days every approximate twenty-eight years. A sequence number (12) drawn from the tabulation identifies usable 'like years' and is itself used to set sliding cursor scales (14, 17, 20, and 23) thereby presenting a monthly layout of days (19) appropriate to the month of the year in selection and in columns of days from Sunday to Saturday inclusive. <IMAGE>

Description

SPECIFICATION Perpetual monthly calendar This invention relatestoaself-contained perpetual monthly calendar.

Calendars are sequential and chronological tables chartiny the evolution of time and usually on a daily (ie twenty four hours) rating of units. They are custo marily measured in parameters of three hundred and sixty fiveith ree hundred and sixty six days, and termed as calendar years. These tables are typically appended to a photograph or painting, or series thereof, depicting seasonal movements during the spread of months from January to December, and by their essential nature become valueless aftertheex- piration ofthe individual yeardenotedthereon.

According to the present invention there is prov ided a self-contained perpetual monthly calendar comprising atabulation of years printedonthereverse side. This tabulation logs requisite years spanning AD1 to infinity in accordance with thereby petitive nature ofthe yearly spread of days every approximate twenty eight years. The tabulation lists a sequence number between one and seven inclus- ive to identify "like years" for the purpose of setting the "cursors" (sliding scales), and thereby availing a monthly layout of days appropriate to the month of the year in selection, in columns of days between Sunday through to Saturday following.

Essentially the perpetuality ofthe calendar, which may be square, rectangularorcircularconstruction, consists of a researched tabulation of yea rs adaptableto infinity, and foursliding scales of cursors linked to the tabulation by means of a sequence number, as herein described, relative to the month and year selected.

Aspecific embodiment ofthe invention will now be described by way of example with reference to the accompanying drawing in which Figure 1 illustrates the front and reverse-side views ofthe calendar; Figure2showsthe details of cursorA; Figure Jshows the details of cursor B; Figure 4 shows the details of cursor C; Figure 5shows the details of cursor D; and Figure 6 illustrates the complete and unrestricted view of the monthly numeric layout.

A Description of operation (Ref. Fig. 1) 1) Obtain the sequence number representative of the year desired: On the reverse side of the calendar is listed a tabulation of years between AD1 and 2199 (excluding the years AD 701 to 1400 inclusive) in columns (10). Heading each column (10) is a sequence number(12) representative of all the years contained thereunder. As for the years AD 701 to 1400 inclusive, the representative sequence numbers (12) can be ob tained by subtracting 700 years from the desired choice of year and locating the resultant yearwithin the listing AD1 to 700, eg, for year AD 1350 subtract 700 and locate instead the year AD 650 within the listing.Furthermore, any year beyond AD 2199 is catered for by subtracting multiples of 400 years from the desired choice of year and locating the resultant yearwithin the listing AD 1799 to 2199, eg. foryear AD 3283 subtract 1200 (three multiples of 400) and locate instead the year 2083 within the listing.

For leap years, two sequence numbers are provided as shown (13) heading every fourth consecutive column. The first sequence number is representative ofthe year selected within the column when also selecting months January and February of that year; the second sequence number to be used when selecting March to December of that selected year. Therefore the operator must locate the desired choice of yearwithin the listing and use the sequence number at the head of the column of years in which it is containedforfurtherreference.

2) Obtain the appropriate monthly layout: By operating cursorAto reveal sequence number(1 2) at window (15) a printed tableau or list of months is revealed at window (16). This tableau instructs the position of the next cursor, cursor B (17) bearing a poin ter (18) which, when directed to the month desired within the list at window (16), the appropriate daily/ numeric layout for that month is displayed at centre window (19) ie. the seven days ofthe week are app ropriately headed above the numeric breakdown for the month selected.

3) Obtain the exact amount of days for the month: By operating cursor C (20) to reveal sequence number (12) at window (21) a tableau oftwelve months is revealed at window (22). This tableau in structs the position ofthe next cursor, cursor D (23) bearing a pointer (24) which when directed to the month desired within the list at window (22), the co r rectamountofdays appropriatetothe month selec- ted isthen displayed atwindow(19).Wheneverthe year and month selected is a leap year and February respectively, pointer (24) must be directed to month "Feb LY" hence revealing thetwenty-ninth dayofan otherwise twenty-eight day month.

B Description of components (Figs. 2 to 6inclusive) 1) Referring to Figure 2, the details of cursorA are shown. By operating in a horizontal sliding movement as depicted by a rrow (25), cu rsor A is contained within a pocket inside the calendarfabrication and revealed only at two windows. Printed on the cursor is a list of twenty-two months (26) although only twelve months are displayed at any one time due to the restrictive width of window (16 Fig. 1). Abovethis list are the seven sequence numbers (27) each one representing a section of list (26) containing all twelve months ofthe year. Hence it is each ofthese sequence numbers which decides the position of cursor by their appearance at window (15 Fig. 1).

End faces (28) abut against stops in the pocket in which it is contained thereby preventing cursorover- travel.

2) Referring to Figure 3, the details of cursor B are shown. This cursor also operates in a horizontal sliding movement as depicted by arrow (29) and within a track on the calendar. It is set by directing pointer (30) to the desired month as displayed within the list at window (16 Figure 1). By observing the display of numbers at window (31), it can now be seen thatthe first day (numeric 1) ofthat particular month is a Sunday, Monday orwhatever day of theweek as indica ted by the heading (32) above and subsequently matching a week-day with every other numeric day for the month. End faces (33) abut against stops on the calendarto prevent cursor overtravel. Operating within a pocket in this cursor B and behind windows (34) and (35) is a third cursor, cursor C as described later.Furthermore a fourth cu rsor, cu rsor D is housed within cursor B but in the lower portion ofthe cursor and revealing itself as a necessary obstruction atwindow (31).

3) Referring to Figure 4,the details ofcursorCare shown. This cursor operates within a pocket in cursor B and in a vertical sliding movement as depicted by arrow (36). Printed on the cursor are seven sequence numbers(38) each assigned a linearcombination (37) oftwelve months although the month of February is repeated along with the letters 'LY'to be used in the case of leap year selection. Thesequ- ence number(38) and linearcombination (37) appear at windows (34 and 35 Figure 3) respectively. End faces (39) abut against stops in the pocket within which it is contained thereby preventing cursor overtravel.

4) Referring to Figure 5, the details of cursor D are shown. This cursor operates in a horizontal sliding movement as depicted by arrow (40) and behind the lower portion of cursor B. It is set by directing the pointer (41) to the month desired within the list on displayatwindow (22 Figure 1). Duets the dimensional characteristics of this cursor, namely at edges (42), the exact amount of days appropriate to the month selected are displayed, eg.the cursor ob- structs number 31 whenever the month contains only 30 days.

5) Referring to Figure 6, the details of the unrestricted view of columns of numbers are shown and is printed on the calendar base, behind the centre displaywindow(19 Figure 1) of cursor B. At anyone time, a display of seven columns of days only can be seen due to the seven column width of display window (19 Figure 1) and as shown chain-dotted (43) in Figure 6.

Claims (6)

1. Aperpetual monthlycalendarcomprising a sequential listing of numbers appropriately availing one to twenty-eight, twenty-nine, thirty or thirty-one, displayed structurally by using a sequence number obtained from an infinite and researched tabulation ofyears thereby grouping the same into dailycol- umns appropriately headed Sunday to Saturday inclusive relevantto the month of the year represented bythatsequence number.

2. A perpetual monthly calendar as claimed in Claim 1 whereby a researched and infinite tabulation of years is provided wherein like years are grouped in columns and awarded a sequence numberto be used in identifying a month as described in Claim 1.

3. Perpetual monthly calendar as claimed in Claim 1 wherein foursiding scales orcursors are provided to avail the numeric and structural composition of a month within a year as selected using a sequence number as described in Claim 2.

4. Aperpetual monthlycalendaras claimed in Claim 1 wherein a sliding scale orcursor'A' is provided depicting various combinations of months or single months which when set according to the sequence number described in Claim 2 offers a tableau oftwelve months wherein a second sliding scale or cursor 'B' may be directed to evidence a layout of days appropriate to the month selected oftheyear represented bythesequence numberasdescribed in Claims 1 and 2.

5. A perpetual monthly calendar as claimed in Claim 1 wherein a third and fourth cursor orsliding scale as described in Claim 3 utilisesthe sequence number described in Claims 1 and 2 to avail the correct number of days to the month selected after using cursors 'A' and 'B' as described in Claim 4 by drawing upon a tableau of ninety-one months grouped in seven linear combinations oftwelve months so thatwhen the cursors are applied in ac cordancewith the sequence numbera numericre- striction is provided to the display and so availing the correct number of days appropriateto the month and year in selection.

6. A perpetual monthly calendar substantially as described herein with reference to Figure 1 to 6 ofthe accompanying drawing.