US3786624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar cell watch dial having calendar display window
Assignee: Suwa Seikosha KK
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Filing: 1972-07-03
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Granted: 1974-01-22
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Expires: 1992-07-03
Abstract
Abstract A timepiece has a plurality of solar cell elements arranged on the surface of the dial thereof, the dial being formed with a window through which a time or calendar indication may be viewed. The portion of one or more of the solar cell elements in the region of the window is removed. The elements having portions removed are connected in parallel with each other if the total light receiving area thereof is not less than the light receiving area of other of said elements, otherwise, the elements having portions removed are electrically disconnected from the other of said elements.
Inventors
- 👤 H Uchiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:32
CPC Classifications
G; G04; G04C; G04C10/00; G04C10/02; Y; Y10; Y10S; Y10S136/00; Y10S136/291
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
204 words
In a timepiece having a battery and a dial formed with a window therethrough permitting viewing of at least one of date, day, hour, minute and second indications energized by said battery, the improvement comprising a plurality of solar cell elements for storing energy in said battery and mounted on the surface of said dial except in the region of said window, said plurality of solar cell elements being of substantially uniform light receiving areas; at least two further solar cell elements mounted on said dial in the region of said window but out of overlapping relation therewith, each of said further solar cell elements being formed with cut away regions at least in part defining said window and having a light receiving area less than the light receiving area of each of said plurality of firstmentioned solar cell elements, the sum of the light transmitting area of said further solar cell elements being at least equal to the area of one of said plurality of solar cell elements; and circuit means for interconnecting said further solar cell elements in parallel and said plurality of first-mentioned solar cell elements in series with each other and the parallel connection of said further solar cell element.
Claim 2
Dependent Claim
204 words
In a timepiece having a battery and a dial formed with a window therethrough permitting viewing of at least one of date, day, hour, minute and second indications energized by said battery, the improvement comprising a plurality of solar cell elements for storing energy in said battery and mounted on the surface of said dial except in the region of said window, said plurality of solar cell elements being of substantially uniform light receiving areas; at least two further solar cell elements mounted on said dial in the region of said window but out of overlapping relation therewith, each of said further solar cell elements being formed with cut away regions at least in part defining said window and having a light receiving area less than the light receiving area of each of said plurality of firstmentioned solar cell elements, the sum of the light transmitting area of said further solar cell elements being at least equal to the area of one of said plurality of solar cell elements; and circuit means for interconnecting said further solar cell elements in parallel and said plurality of first-mentioned solar cell elements in series with each other and the parallel connection of said further solar cell element.
Claim 3
Dependent Claim
41 words
A timepiece as recited in claim 1, wherein each of said plurality of first-mentioned solar cell elements are essentially pie-shaped, each of said further solar cell elements being essentially pie-shaped except for the portion thereof which would otherwise overlap said window.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |