US4019037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic wristwatch incorporating calculator
Assignee: Suwa Seikosha KK
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Filing: 1972-12-27
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Granted: 1977-04-19
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Expires: 1992-12-27
Abstract
Abstract An electronic wristwatch having a digital display and time-keeping apparatus for driving said digital display is provided with calculating means selectively coupled to said digital display. An input arrangement for said calculating means is provided consisting of a ring rotatably mounted on said wristwatch, and fixed and rotatable contact means respectively mounted on said wristwatch and ring for selective alignment at positions representative of the numerals 0 to 9 and at least one function character. Switch means is provided for applying the numerical or function character at which said ring is set to said calculating means, a further switch means being provided for selective setting of the wristwatch between a time keeping and calculating mode.
Inventors
- 👤 Takashi Monna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:16
CPC Classifications
G; G04; G04G; G04G9/00; G04G9/0064; G04G9/007; H; H01; H01H; H01H13/00; H01H13/70; H01H13/84; H01H2231/00; H01H2231/028
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
122 words
An input device for an electronic wristwatch incorporating calculating means comprising a ring member rotatably mounted on said wristwatch, fixed contact means operatively coupled to said calculating means, displaceable contact means mounted for rotation with said ring member, and mark means on said wristwatch, said ring member having numerical characters representative of each digit from 0 to 9 and at least one function character applied thereto at discrete circumferentially spaced positions; at least one of said fixed and movable contact means including a plurality of contact elements respectively associated with said numerical and function characters and positioned for electrical engagement between the contact element associated with the character aligned with said mark means and the other of said fixed and movable contacts.
Claim 2
Dependent Claim
122 words
An input device for an electronic wristwatch incorporating calculating means comprising a ring member rotatably mounted on said wristwatch, fixed contact means operatively coupled to said calculating means, displaceable contact means mounted for rotation with said ring member, and mark means on said wristwatch, said ring member having numerical characters representative of each digit from 0 to 9 and at least one function character applied thereto at discrete circumferentially spaced positions; at least one of said fixed and movable contact means including a plurality of contact elements respectively associated with said numerical and function characters and positioned for electrical engagement between the contact element associated with the character aligned with said mark means and the other of said fixed and movable contacts.
Claim 3
Dependent Claim
61 words
The input device for an electronic wristwatch as recited in claim 1, wherein said fixed contact means is mounted on said wristwatch in fixed positional relation to said mark means, said movable contact means including a plurality of contact elements mounted on said ring member, at least one of said contact elements being in registration with each of said character-associated positions.
Claim 4
Dependent Claim
42 words
The input device for an electronic wristwatch as recited in claim 2, wherein the contact elements associated with each character-associated position define a four-position binary code, said fixed contact means having four contacts corresponding to the four positions of said binary code.
Claim 5
Dependent Claim
63 words
The input device for an electronic timepiece as recited in claim 1, wherein said fixed contact means includes a plurality of fixed contact elements mounted in circumferentially spaced relation on said wristwatch and a movable contact member mounted for rotation with said ring member and engagement with the fixed contact means contact member associated with the character in registration with said mark means.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |