US3755941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perpetual calendars
Assignee: Individual
•
Filing: 1971-11-18
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Granted: 1973-09-04
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Expires: 1991-11-18
Abstract
Abstract A device for determining and displaying the calendar for ANY month of ANY year of ANY century, the novelty and essence of which reside in avoiding any separation of Leap from Common YEARS (thereby eliminating the necessity for TWO Januaries and Februaries (one for leap, and one for common, years)), and, instead, segregating pre-March, from post-February MONTHS. This necessitates a DIFFERENT year pattern for each of these two separate month groups. Each of these two sections consists of a face and two positionable members. The face has three windows or the like, and, at one of them, the seven week-day names, while the positionable members have, in one type: months and centuries on one, and years and calendar on the other, and in another type: months and years on one and centuries and calendar on the other. Month names and calendar are necessarily always on different positionable members, as are centuries and years. The desired month is set at one window, thereby fixing the century (or year) numerals in position; then the desired year (or century) is aligned with the desired previously positioned century (or year), thereby revealing in the second individual window the correct calendar for that setting, the century and year both appearing in a common (third) window. The same calendar is, of course, correct for every other so linked century-year combination. A mistake, due to not knowing whether a given year is, or is not, a leap year, is impossible with this perpetual calendar.
Inventors
- 👤 A Zeiske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:01
CPC Classifications
G; G09; G09D; G09D3/00; G09D3/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
386 words
A perpetual calendar comprising a body structure having at least one face, each such face embracing three viewing areas; a plurality of positionable elements, each having at least one face; means on said body structure for adjustably supporting and positioning said positionable elements so that portions of said faces of said positionable elements can be selectively exposed at said viewing areas; each positionable element having two separate groups of indicia on each of its faces, said indicia groups being arranged so that a first group of indicia on a face of one of said positionable elements is selectively exposed at a first viewing area of a face of the body structure, a first group of indicia on a face of another one of said positionable elements is selectively exposed at a second viewing area of said face of the body structure, and a second group of indicia on each of said faces of said two above mentioned positionable elements is exposed jointly at a third viewing area of said face of the body structure; the first and second groups of indicia on a face of one of the plurality of positionable elements designating: (1) the names of all 10 post-February months and (2) numerals representative of centuries, respectively, and the first and second groups of indicia on a face of another one of the plurality of positionable elements designating numerals representative of: (1) days of a month and (2) all the one hundred years 00 through 99 inclusive, so that the independent positioning of each of said two positionable elements selectively reveals a perpetual calendar comprising century and year numerals, at least one postFebruary month name, and day numerals; the first and second groups of indicia on a further face of one of the plurality of positionable elements designating: (1) the names of the two pre-March months and (2) numerals representative of centuries, respectively, and the first and second groups of indicia on a further face of another one of the plurality of positionable elements designating numerals representative of: (1) days of a month and (2) all the one hundred years 01 through 100 inclusive, so that the independent positioning of each of said two positionable elements selectively reveals a perpetual calendar comprising century and year numerals, at least one pre-March month name, and day numerals.
Claim 2
Dependent Claim
386 words
A perpetual calendar comprising a body structure having at least one face, each such face embracing three viewing areas; a plurality of positionable elements, each having at least one face; means on said body structure for adjustably supporting and positioning said positionable elements so that portions of said faces of said positionable elements can be selectively exposed at said viewing areas; each positionable element having two separate groups of indicia on each of its faces, said indicia groups being arranged so that a first group of indicia on a face of one of said positionable elements is selectively exposed at a first viewing area of a face of the body structure, a first group of indicia on a face of another one of said positionable elements is selectively exposed at a second viewing area of said face of the body structure, and a second group of indicia on each of said faces of said two above mentioned positionable elements is exposed jointly at a third viewing area of said face of the body structure; the first and second groups of indicia on a face of one of the plurality of positionable elements designating: (1) the names of all 10 post-February months and (2) numerals representative of centuries, respectively, and the first and second groups of indicia on a face of another one of the plurality of positionable elements designating numerals representative of: (1) days of a month and (2) all the one hundred years 00 through 99 inclusive, so that the independent positioning of each of said two positionable elements selectively reveals a perpetual calendar comprising century and year numerals, at least one postFebruary month name, and day numerals; the first and second groups of indicia on a further face of one of the plurality of positionable elements designating: (1) the names of the two pre-March months and (2) numerals representative of centuries, respectively, and the first and second groups of indicia on a further face of another one of the plurality of positionable elements designating numerals representative of: (1) days of a month and (2) all the one hundred years 01 through 100 inclusive, so that the independent positioning of each of said two positionable elements selectively reveals a perpetual calendar comprising century and year numerals, at least one pre-March month name, and day numerals.
Claim 3
Dependent Claim
159 words
The peRpetual calendar set forth in claim 1 wherein the first and second groups of indicia on a face of one of the plurality of positionable elements designates: (1) the names of all 10 post-February months and (2) numerals representative of the one hundred years 00 through 99, inclusive, and the first and second groups of indicia on a face of another one of the plurality of positionable elements designates numerals representative of: (1) centuries and (2) days of a month, respectively; and wherein the first and second groups of indicia on a further face of one of the plurality of positionable elements designates: (1) the names of the two pre-March months and (2) numerals representative of all the one hundred years 01 through 100, inclusive, and the first and second groups of indicia on a face of another one of the plurality of positionable elements designates numerals representative of: (1) centuries and (2) days of a month, respectively.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |