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Publication numberUS2575555 A
Publication typeGrant
Publication dateNov 20, 1951
Filing dateJun 23, 1949
Priority dateJun 23, 1949
Publication numberUS 2575555 A, US 2575555A, US-A-2575555, US2575555 A, US2575555A
InventorsLa Plante Paul W
Original AssigneeLa Plante Paul W
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Perpetual calendar
US 2575555 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Nov. 20, 1951 P. W. L A PLANTE PERPETUAL CALENDAR 4 Sheets-Sheet l Filed June 23. 1949 3mm R WLa/Diane Nov. 20, 1951 P. w. LA PLANTE PERPETUAL CALENDAR 4 Sheets-Sheet 3 Filed June 23. 1949 NOV 20, 1951 P. w. LA PLANTE PERPETUAL CALENDAR Filed June 25. 1949 4, Sheets-Sheet 4 JANUARY-(ZZ MM T WT l' Z5 JU LY l H 9 la7/ 1525] FEBRUARY SMTWT F5 /dll OSCE MBSR MMM Patented Nov. 20,*1951 UNITED vvSTATIES ATENTA OFFICE.,

PERPETUAL CALENDAR Paul W. La Plante, Phoenix, Ariz. Application J une 23, 1949, Serial No. 100,807

1 Claim. 1.

This invention relates to perpetual calendars.

An object of this invention is to provide a perpetual calendar embodying a pair of spaced sheets formed with two series of spaced windows or openings, there being one window for each month, and each sheet having a pair of vertically elongated windows or openings between the series of monthly windows for exposing yearly indicia carried by an intermediate slide sheet. The two facing sheets are formed with registering slots adjacent the lower portion thereof and the slide sheet has a grommet secured thereto in the area of the slots so that the slide sheet may be adjusted by extending a pencil or other article into the grommet. By providing the slide sheet with month and year indicia on both sides thereof, leap years and such other years as are not shown on one side can be shown on the other side.

With the above and other objects in View, my invention consists in the arrangement, combination and details of construction disclosed in the drawings and specification, and then more particularly pointed out in the appended claim.

In the drawings,

Figure 1 is a detail front elevation, partly broken away, of a perpetual calendar constructed according to an embodiment of this invention,

Figure 2 is a side elevation of one side of the intermediate slide sheet,

Figure 2EL is a side elevation of the other side of the intermediate slide sheet,

Figure 3 is a detail rear elevation of the device,

Figure 4 is a fragmentary sectional view taken onthe line 4-4 of Figure 1,

Figure 5 is a fragmentary sectional View taken on the line 5-5 of Figure 1,

Figure 6 is a fragmentary sectional view taken on the line 6-6 of Figure 1.

Referring to the drawings, the numerals I and II designate generally a pair of rectangular sheets which are disposed in face abutting relation and are secured together adjacent one longitudinal edge thereof by means of a pair of grommets I2.

The sheet I0 is formed with a pair of vertically spaced apart series of openings I3 and I4 constituting windows, and representing the months of the year. Indicia I is disposed adjacent each opening I3 and I4 designating the months of the year, and additional indicia IB is disposed along the upper edge of each opening I3 and I4 designating the days of the week.

The sheet I0 is formed between the two series of openings I3 and I4 with a pair of vertically elongated openings II and I8. These open- 2 ings I'I and I8 constitute elongated windows for exposing the year indicia and adjacent the openings I'Ir and I8 indicia I3 is positioned representing the last two digits of years. The first two digits of the years will be hereinafter described.

The sheet I l is formed with two series of vertically spaced apart openingsor windows 20v and 2|, similar to the openings I3 and I4, and the sheet II has printed thereon the monthly designations 22 and day designations 23. The sheet Il is also formed with a pair of vertically elongated openings 24 and 25 for exposing year indicia, and the sheet Il has printed thereon adjacent the vertical edge of each opening 24 and 25 the last two digits 2S of the year indicia.

An intermediate slide sheet 2l is disposed between the two sheets I0 and I I and is formed with a pair of cut-outs or slots 28 adjacent one longitudinal edge thereof, within which the grommets I2 are adapted to loosely engage.

The sheet I0 is formed with a longitudinally elongated opening 29 and the sheet II is formed with a registering elongated opening. 30 so that a gromrriet 3I which is secured to the intermediate slide sheet 2'I may be engaged by a pencil or other article to provide for longitudinal shifting of the intermediate sheet 2l. The grommet 3I projects into the openings 29 and 33 so that the intermediate sheet is held against upward movement by the edges of the openings 29 and 30.

The intermediate sheet 2l is provided with spaced groups of numerals 32 representing the days of each month, which are adapted to be exposed through the window openings I3 and I4. The sheet 2'I is provided withthe spaced groups of numerals 32 on each face thereof so that the day indicating numerals will be exposed through the window openings i3 and I4 and the window openings 20 and 2 I.

The intermediate sheet 2l is also provided with at least the first two digits of the year indicating indicia 33 for exposing through the elongated windowY openings Il and IB, and also formed on the back side thereof with year indicia 34 for exposing through the rear vertical elongated openings or windows 24 and 25. At least one outer sheet may be provided with instructions as to the use vand operation of this device, and in the present instance the outer face of sheet I0 is provided with instructions 35.

The indicia IQ and 33 indicate the normal years, whereas the indicia 26 and 34 indicate the leap years and other years which are not contained in the indicia I9 and 33.

In the use and operation of this calendar, the

intermediate sheet 21 is shifted laterally either to the right or to the left until the first two year digits appear in either column l1 or i8 in a position aligning with the correct year indicia I9. In the present instance the year indicia I9 representing the first digits of the year 1949 are disposed opposite the numerals 49 positioned between the two openings Il' and I8 and designated by an arrow 36. When the correct year has been exposed the correct monthly indicia will be exposed through the openings I3 and i4. When the year is leap year, the calendar is turned over and the slide sheet 21 is shifted to position indieia 34 in correct association with indicia 26.

I do not mean to conne myself to the exact details of construction herein disclosed, but claim all variations failing within the purview of the appended claim.

What I claim is:

A perpetual calendar comprising a pair of face abutting sheets having a plurality of windows for exposing monthly indicia, and also having a pair of elongated openings for exposing yearly indicia, an intermediate sheet between said pair of sheets, spaced groups of numerals on said intermediate sheet for exposing through said iirst named windows, year indicating numerals on said intermediate sheet for exposing through said pair of elongated openings, a longitudinally elongated opening in each of said pair of sheets, a grommet carried by said intermediate sheet projecting partly into said latter openings whereby said intermediate sheet may be length-A wise shifted by insertion of an article into said grommet, additional longitudinally elongated openings in said intermediate sheet, and grommets extending through said additional openings carried by said pair 0f sheets serving as limit stops for said intermediate sheets.


REFERENCES CITED The following references are of record in the le of this patent:


Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US173655 *Nov 13, 1875Feb 15, 1876 Improvement in perpetual counting-house calendars
US786618 *Apr 23, 1904Apr 4, 1905Jacob BallCalendar.
US1668280 *Dec 23, 1924May 1, 1928 Pehpettjal calendar
GB244263A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2786291 *Mar 23, 1953Mar 26, 1957 alley
US2789763 *May 3, 1954Apr 23, 1957 For making chronological investigation
US3201884 *Nov 13, 1962Aug 24, 1965Aughey John LPerpetual calendar
US3209478 *Feb 4, 1963Oct 5, 1965Burkert Arthur SMultiple century calendars
US3427740 *Nov 22, 1966Feb 18, 1969Heskes JacobPerpetual calendar
US3546801 *Aug 8, 1969Dec 15, 1970Kolody Stanley JAdjustable calendar
US7481012 *Nov 15, 2006Jan 27, 2009William Carr ServossPerpetual calendar system and method of use thereof
U.S. Classification40/109, 101/397
International ClassificationG09D3/00, G09D3/04
Cooperative ClassificationG09D3/04
European ClassificationG09D3/04