US3842590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calendar timepiece
Assignee: Citizen Watch Co Ltd
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Filing: 1973-06-28
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Granted: 1974-10-22
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Expires: 1993-06-28
Abstract
Abstract An improved calendar timepiece in which the correspondence between the month and date can be easily adjusted to obtain any desired date and month relationship.
Inventors
- 👤 T Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:33
CPC Classifications
G; G04; G04B; G04B19/00; G04B19/24; G04B19/243; G04B19/247; G04B19/25; G04B47/00; G04B47/003
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
168 words
A calendar timepiece comprising: a casing having a dial thereon; said dial having hour indicia regularly spaced about the periphery thereof, a first window, a second window, and weekday indicators fixed on said dial adjacent said second window designating in order Sunday through Saturday; a month disc viewable through the first window having indicia thereon designating the months of the year; a calendar disc having indicia thereon designating the dates of a month, said calendar disc indicia being located such that when the first date is positioned adjacent the corresponding weekday indicator, a complete monthly calendar is viewable through said second window with each date aligned with the proper corresponding weekday indicator; setting means mounted on said casing for manually setting said month disc and said calendar disc; a timepiece movement; hour, minute, and second hands driven by said timepiece movement overlying said dial; and a day disc driven by said timepiece movement having means coacting with said date indicia for indicating automatically the day of the month.
Claim 2
Dependent Claim
168 words
A calendar timepiece comprising: a casing having a dial thereon; said dial having hour indicia regularly spaced about the periphery thereof, a first window, a second window, and weekday indicators fixed on said dial adjacent said second window designating in order Sunday through Saturday; a month disc viewable through the first window having indicia thereon designating the months of the year; a calendar disc having indicia thereon designating the dates of a month, said calendar disc indicia being located such that when the first date is positioned adjacent the corresponding weekday indicator, a complete monthly calendar is viewable through said second window with each date aligned with the proper corresponding weekday indicator; setting means mounted on said casing for manually setting said month disc and said calendar disc; a timepiece movement; hour, minute, and second hands driven by said timepiece movement overlying said dial; and a day disc driven by said timepiece movement having means coacting with said date indicia for indicating automatically the day of the month.
Claim 3
Dependent Claim
42 words
A calendar timepiece as in claim 1 further comprising means connected to said setting means for selectively changing the month disc and the calendar disc, and means connected to said setting means for changing the month disc and calendar disc in unison.
Claim 4
Dependent Claim
99 words
A calendar timepiece as in claim 2 wherein the month disc and the calendar disc are so arranged in said timepiece that when the calendar disc and month disc are adjusted to indicate the correct month and the calendar disc indicia is positioned adjacent the corresponding weekday indicator, and the means for changing the month disc and calendar disc are operated in unison to correctly position the calendar disc indicia adjacent the corresponding weekday indicator for the next month in said second window, the month disc is correspondingly adjusted to correctly indicate the next month within said first window.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |