Patent US4092521A successfully refreshed from Google Patents.
US4092521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Menstrual calculator
Assignee: Individual
•
Filing: 1976-05-04
•
Granted: 1978-05-30
•
Expires: 1996-05-04
Abstract
Abstract A dial calculator for determining periods of fertility and sterility in a menstrual cycle of a human female. In one embodiment, the calculator includes first and second discs each having an annular display of first indicia representing thirty-one days of a calendar month. The second disc is smaller than the first disc and is adapted to be rotatably set in coaxial relation with the first disc so that the indicia of the second disc follow consecutively any one of the indicia on the first disc. A third disc is adapted to be rotatably set in coaxial relation with the second disc in respect of any one of the indicia on the first disc. The third disc is smaller than the second disc and includes an annular display of second indicia representing at least the days of a normal menstrual cycle including the periods of fertility and sterility and relates such days to the consecutively arranged indicia of the first and second discs. The three discs are simple to operate and display the indicia in improved form. Another embodiment includes a fourth disc overlying the innermost disc for setting the periods of fertility and sterility relative to the day of onset of the next following menstrual cycle when such day is variable.
Inventors
- 👤 Manfred E. Weisshaar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:40
CPC Classifications
G; G06; G06C; G06C3/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
228 words
A dial calculator for determining periods of fertility and sterility in a current menstrual cycle of a human female, comprising: first and second discs divided into a plurality of equal segments with each disc having an annular display of first indicia disposed along substantially the entire periphery thereof, said indicia representing thirty-one days of a calendar month and occupying corresponding ones of the segments in the discs, the second disc being smaller than the first disc and adapted to be rotatably set in coaxial relation therewith so that the indicia of the second disc follow consecutively on a shorter radius a first predetermined one of the indicia of the first disc; and a third disc divided into said plurality of equal segments and being adapted to be rotatably set in coaxial relation with the second disc in respect of a second predetermined one of the indicia on the first disc, the third disc being smaller than the second disc and including an annular display of second indicia disposed along substantially the entire periphery thereof, said second indicia being arranged to display complete days following said second predetermined one of the indicia of the first disc and representing at least the days of a normal menstrual cycle including the periods of fertility and sterility and relating said days to the consecutively arranged indicia of the first and second discs.
Claim 2
Dependent Claim
228 words
A dial calculator for determining periods of fertility and sterility in a current menstrual cycle of a human female, comprising: first and second discs divided into a plurality of equal segments with each disc having an annular display of first indicia disposed along substantially the entire periphery thereof, said indicia representing thirty-one days of a calendar month and occupying corresponding ones of the segments in the discs, the second disc being smaller than the first disc and adapted to be rotatably set in coaxial relation therewith so that the indicia of the second disc follow consecutively on a shorter radius a first predetermined one of the indicia of the first disc; and a third disc divided into said plurality of equal segments and being adapted to be rotatably set in coaxial relation with the second disc in respect of a second predetermined one of the indicia on the first disc, the third disc being smaller than the second disc and including an annular display of second indicia disposed along substantially the entire periphery thereof, said second indicia being arranged to display complete days following said second predetermined one of the indicia of the first disc and representing at least the days of a normal menstrual cycle including the periods of fertility and sterility and relating said days to the consecutively arranged indicia of the first and second discs.
Claim 3
Dependent Claim
102 words
A calculator as claimed in claim 1 further comprising: a tab portion on the second disc extending radially outwardly to the periphery of the first disc and adapted to be positioned in respect of a predetermined one of the indicia of said first disc; and a tab portion on the third disc extending from a segment thereof that separates the first and last indicia of said cycle for indicating the onset of the current menstrual cycle and extending radially outwardly to the periphery of the first disc and adapted to be disposed in registered alignment with any one of the indicia thereon.
Claim 4
Dependent Claim
47 words
A calculator as claimed in claim 2 wherein the third disc includes an annular scale disposed inwardly of the indicia of said cycle and indicates in combination therewith the day of onset for a next following menstrual cycle and the days of said fertility and sterility periods.
Claim 5
Dependent Claim
18 words
A calculator as claimed in claim 3 further comprising means for securing said discs in coaxially rotatable relation.
Claim 6
Dependent Claim
24 words
A calculator as claimed in claim 4 further comprising means for locking said tab portions to the first disc in a predetermined fixed relation.
Claim 7
Dependent Claim
22 words
A calculator as claimed in claim 5 wherein each disc is apportioned into thirty-six uniform segments which separate the indicia displayed thereon.
Claim 8
Dependent Claim
31 words
A calculator as claimed in claim 6 wherein the tab portion of the second disc includes a window adapted to be placed in registry with any segment of the first disc.
Claim 9
Dependent Claim
34 words
A calculator as claimed in claim 6 wherein the tab portion of the second disc includes a leading edge adapted to be placed adjacent a trailing side of any segment of the first disc.
Claim 10
Dependent Claim
30 words
A calculator as claimed in claim 8 further comprising a writing surface on the reverse side of the first disc apportioned into twelve equal segments for recording menstrual data thereon.
Claim 11
Dependent Claim
57 words
A calculator as claimed in claim 8 wherein the means for locking includes a perforation in each segment of the first disc within said portion of the periphery of said disc, a corresponding perforation in each of the tab portions and a pin adapted to lockably fit the corresponding perforations of each tab portion and first disc.
Claim 12
Dependent Claim
23 words
A calculator as claimed in claim 8 wherein the indicia of any disc are differently coloured from the indicia of an adjoining disc.
Claim 13
Dependent Claim
64 words
A calculator as claimed in claim 6 wherein a fourth disc at least partly overlies the third disc in coaxially rotatable relation, said fourth disc including at least a portion of the annular scale indicating the days of fertility and a tab portion settable to the day of onset of the next following menstruation period for setting the days of fertility with respect thereto.
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) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |