US3834151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timepiece with automatic calendar
Assignee: Individual
•
Filing: 1973-04-03
•
Granted: 1974-09-10
•
Expires: 1993-04-03
Abstract
Abstract A timepiece has an automatic calendar with a correcting means that takes account of the months having less than 31 days, and leap years. The correcting means, and preferably also the timepiece itself, is electrically actuated, as by a battery carried by the timepiece. The month indicator of the calendar drives slowly rotating cams that close first electrical contacts on February 28, February 29, and the last day of each month having 30 days. The day of the month indicator is driven by mechanism that also turns relatively rapidly rotating cams once a day that close second electrical contacts at midnight. There are three pairs of first and second contacts in series with each other and with an electric motor or electromagnetic device; and the cams of the second contacts ensure that each pair of contacts will be closed the correcting means thus actuated, for an interval or a number of pulses sufficient to advance the day of the month indicator to skip one, two or three days at the end of each month having less than 31 days.
Inventors
- 👤 P Bodet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:45
CPC Classifications
G; G04; G04C; G04C17/00; G04C17/0025; G04C17/0033; G09; G09D; G09D3/00; G09D3/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
155 words
A timepiece having an automatic calendar with a changeable display indicating the day of the month by successively displayed numerals, comprising electrical correcting means for skipping the numeral 31 at the end of a month having 30 days, and for skipping the numerals 30 and 31 at the end of a month having 29 days, and for skipping the numerals 29, 30 and 31 at the end of a month having 28 days, said correcting means having in circuit therewith a first contact, a first rotary cam that rotates once a year and closes said first contact at the end of each month having 30 days, and in series therewith a second contact, and a second rotary cam rotating faster than said first rotary cam to close said second contact and to advance said day of the month indicator from 30 past 31 to 1 at midnight on the 30th day of a said month.
Claim 2
Dependent Claim
155 words
A timepiece having an automatic calendar with a changeable display indicating the day of the month by successively displayed numerals, comprising electrical correcting means for skipping the numeral 31 at the end of a month having 30 days, and for skipping the numerals 30 and 31 at the end of a month having 29 days, and for skipping the numerals 29, 30 and 31 at the end of a month having 28 days, said correcting means having in circuit therewith a first contact, a first rotary cam that rotates once a year and closes said first contact at the end of each month having 30 days, and in series therewith a second contact, and a second rotary cam rotating faster than said first rotary cam to close said second contact and to advance said day of the month indicator from 30 past 31 to 1 at midnight on the 30th day of a said month.
Claim 3
Dependent Claim
29 words
A timepiece as claimed in claim 1, said timepiece being an electrical timepiece having a common source of electrical current for actuating both the timepiece and said correcting means.
Claim 4
Dependent Claim
30 words
A timepiece as claimed in claim 1, including means to indicate the hours and minutes, and means driven by the hour indicator to drive said day of the month indicator.
Claim 5
Dependent Claim
111 words
A timepiece as claimed in claim 1, including further first contacts in series with said correcting means and in parallel with each other and with said first-mentioned first contact, further first rotary cams that rotate with a frequency once every 4 years and having actuating portions to close said further first contacts, further second contacts in series with a respective one of said further first contacts and in parallel with each other and with the first-mentioned said second contact and in series with said correcting means, and further secondary rotary cams that rotate with a frequency not less than once every 31 days for closing said further second contacts at midnight.
Claim 6
Dependent Claim
22 words
A timepiece as claimed in claim 4, including a common drive means for said second rotary cams and said day-of-the month indicator.
Claim 7
Dependent Claim
24 words
A timepiece as claimed in claim 4, including a month indicator, and common drive means for said month indicator and said first rotary cams.
Claim 8
Dependent Claim
21 words
A timepiece as claimed in claim 6, including means to drive said month indicator from said day of the month indicator.
Claim 9
Dependent Claim
23 words
A timepiece as claimed in claim 1, including battery means carried by said timepiece for actuating both the timepiece and said correcting means.
Claim 10
Dependent Claim
20 words
A timepiece as claimed in claim 8, in which the same battery actuates both the timepiece and the correcting means.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |