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Publication numberUS968363 A
Publication typeGrant
Publication dateAug 23, 1910
Filing dateAug 1, 1908
Publication numberUS 968363 A, US 968363A, US-A-968363, US968363 A, US968363A
InventorsCharles D Kendig
Original AssigneeCharles D Kendig
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Perpetual calendar.
US 968363 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



Patented Aug. 23, 1910.

INVENTOR CZ Q'ZesflKmIZQ 1 H2 3 084 m 2 T. B22 Ma 6 RHZ H 185 n. 1 n J m 29 2a sw S .k 5 W p Arromzys v UNITED STA CHARLES D. KENDIG, OF LORAIN, OHIO.


Application filed August 1, 1908. Serial No. 446,398.

To all whom it my concern:

Be it known that I, CHARLEs D. KENDIG,

- a citizen of the United States, and a resident of Lorain, in the county of Lorain and State of Ohio, have invented a new and Improved Perpetual Calendar, of which the following is a full, clear, and exact description.

- The purpose of this invention is to provide novel details of construction for a calendar, that are simple, practical andinexpensive, and afford means for an adjustment of the parts which will adapt the calendar for continuous use for a long term of years and reliably exhibit the year, month, week and day in current order as time passes.

The invention consists in the novel construction and combination of parts, as is hereinafter described and defined in the appended claim.

Reference is to be had to the accompanylng drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a front view of the improved calendar, showing the number of days in a selected month of a certain year, the alphabetic characters denoting the days of a week and the numerals, the days in the month; the last day of each month being distinguished by a variation of color; Fig. 2 is a verticalsectional view, substantially on the line 2-2 in Fig. 1; Fig. 3 is a horizontal sectional view, substantially on the line 3-3 in Fig. l; and Fig. 4 is a plan view of a portion of an endless band, showing a special arrangement of numerals thereon that by slight changes in position of said band in service, represent in proper sequence the months and days for a long term of years.

In the drawings that re resent the construction and manner of a justing the details of the improvement for continuous service, it will be seen that the support for the operative details consists of a front wall 10, a rear wall 11 and a spacing strip 12.

The front and rear Walls 10, 11, are rectangular in form considered edgewise, and the spacing strip 12 is secured between'said edges so as to separate said walls a proper distance and dispose them parallel with each other. The front wall 10 is apertured, producing a rectangular opening a therein of considerable area, having greater width than height, and above said aperture and parallel therewith two smaller laterally-elongated rectangular openings 6 and c are formed in said wall, as shown in Fig. 1. On the front wall 10, above the aperture a, letters S, M, T, W, T, F and S are imprinted, that respectively represent the initials of the names of the successive days of a week, n

In the large aperture a, one run of an end- Specification of Letters Patent. Patented Aug. 23, 1910.

less band (Z is exposed, on which are printed a plurality of numerals arranged in six horizontal columns and thirteen vertical columns. The endless band 0? as shown in Fig. 4, is provided with the numerals 1 to 31 arranged consecutively thereon in six horizontal columns and thirteen vertical col-- umns, the first horizontal column containing figures l to 7,'the fifth column figures 23 to 31, the sixth column figures 30 and 31 and the second, third and fourth horizontal columns the remaining figures. The figures are so arranged on the endless band, that when the band-is moved horizontally in the frame, always thirty-one days will bev indicated, in such a way that any week day ma be given with the proper number of the day. It will be observed from an inspection of Figs. 2 and 3, that at the front part of the frame two sheets 10 and 10 are provided, the sheet l0 containing an opening a, while the band (2 passes between the sheets, the sheet 10 forming a backing therefor.

The endless band d, as shown, is mounted at its looped ends upon two vertical shafts e, f, that are at their ends journaled in bracket boxes 6, f, respectively, said boxes being secured upon the rear surface of the front wall 10, the band being stretched taut on these shafts and supported thereon edgewise by collars 6 F, that are secured on said shafts. The shaft c is preferably extended at the lower end thereof and furnished with a serrated collar 6 which by manipulation, will move the endless band d in a proper direction for display of the day-indicating numerals in consecutive order at the front of the calendar.

An endless month-indicating band 9 is provided, having the names of the twelve months in abbreviated form imprinted-successively in spaced order thereon. On the bracket boxes that support the endless band 0?, horizontal sleeves 6 f areformed, in which are journaled the ends of parallel shafts h, h, whereon the month-indicating band 9 is mounted in taut condition between collars 9 that are aflixed on the shafts, said band at its upper portion and on the forward side being exposed through the opening 6 for the display of month name abbreviations, as shown in Fig. 1. In the front and rear walls 10, 11, oppositethe collars g, openings are formed which afiord access to the latter, so that by their manual adjustment, the month-indicating band may be moved endwise for changing the name of a month that has been exposed at the opening 6. Upon the shafts h, h, are also mounted four endless bands 2', i, 2 and 21 in taut condition and spaced from each other by collars m, the latter being secured on sleeves that are loosely mounted upon the shafts, and it will be noted that by a manipulation of the collars me through the adjacent openings in the front and rear walls 10, 11, the bands 71, a", i and i may be separately moved longitudinally. Upon each of the bands 2', i, i and i a series of spaced numerals is imprinted, that are similar, commencing with 1 at the top of each series and ending with 0, below 9, and it will be evident that by an adjustment of the collars we, said bands may be moved longitudinally, so as to expose selected numerals on said bands in a horizontal row, and expose said row of numerals at the opening 0 in the front wall of the calendar, as shown in Fig. 1.

To arrange the device for .use, assuming that a new year is about to commence, the date of the year is exposed by manipulation of the bands 'i to i inclusive, so as to display the proper numerals in rotation at the opening 0. The name abbreviation for the month of January isnext displayed at the opening I). The first day of the year 1908, that is shown at c in Fi 1, comes in on Wednesday, the fourth ay of the week. The month-day-indicating numerals on the band d may be positioned for January 1908, by manipulation of the collar e on the shaft 6, bringing directly below the weekdayindicating character W, and by this ad ustment the day indicating numerals for successive weeks of the month will be shown in sequence, January having 31 days, the first day of February is Saturday; the band 9 is now adjusted so that the name abbreviation Feb. appears at the right opening I) and the band d shifted to place the numeral 1 below S, that indicates the week-day name Saturda It will be seen that by manifest slight changes in the adjustment of the day, month and year-indicating bands, the improved the day-indicating numeral 1 calendar may be readily arranged for successive service during-a long term of years and accurately indicate the current time.

As before stated, the names of the months having thirty days are difi'erently colored from those having thirty-one days, and the numeral 30 as shown by Fig. 4 is colored to correspond. When a month name having thirty days appears in the s ace 6, it is differently colored corresponding to the color of the number 30, thus indicating that the said monthhas thirty. days instead of thirty-one. The abbreviation for February is difierently colored from the month having thirtyone days and also from the months having thirty days, and the numeral 28 is colored to correspond, for a similar reason as stated above.

From the foregoing description and an inspection of the drawings, it will be apparent that the im roved calendar is quite simple, is practica very compact, inexpensive to manufacture and will accurately indicate the current year, month, week and successive days of the months of a year for an indefinite period of time.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

A calendar comprising front and rear walls, the front wall consisting of two sheets having their upper and lower ends superposed and connected, and being s aced apart intermediate the said supe'rpose ends, the superposed ends having openings therethrough, and the outermost sheet having an other 0 ening, endless parallel bands provided ently of each other for indicating the year and the month, said bands having one run moving between the front and the back, and appearing at the upper opening, and an endless band arranged transversely of the said A CHARLES D. KENDIG.



purpose 1th numerals and movable independbands and provided with numerals for the p

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4216596 *Nov 13, 1978Aug 12, 1980Brown Elmer LPerpetual calendar
US4258491 *Mar 30, 1979Mar 31, 1981Ernst Frank JLocation indicating device
Cooperative ClassificationG09D3/10