Patent US2604840A successfully refreshed from Google Patents.
Patent US4141074A successfully refreshed from Google Patents.
US4141074A
Expired / Lapsed
US
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Electronic wrist calculator
Assignee: Individual
•
Filing: 1977-08-29
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Granted: 1979-02-20
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Expires: 1997-08-29
Abstract
Abstract Individual planar enjoined links of a flexible wristband carry one or more manually operable keys, thereby defining a miniature keyboard array for a solid state wrist calculator. One or more of the links may carry a wrist watch battery for powering the calculator.
Inventors
- 👤 Michael Popper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:02
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/02; G06F15/0208; G04; G04G; G04G9/00; G04G9/0064; G04G9/007
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
157 words
In a wrist calculator comprising a generally planar wrist case having opposed faces and opposite ends, a flexible wristband coupled to respective ends of said wrist case, electronic calculator means carried by said case, and including electro-optical display means on one face thereof for optically displaying data during calculator use, battery means for energizing said calculator means and manually operable calculator keyboard means for controlling operation of said calculator means, the improvement wherein: said wristband comprises flexibly joined links and said keyboard means comprises keys carried individually by said links and switch means carried by said links and actuated by said keys, means for electrically connecting said switch means and said battery means to said calculator means, and wherein said keys are of a height generally equal to the height of the links to form single transverse rows on said links and to thereby maximize key area per link to facilitate keyboard operation of the wrist calculator.
Claim 2
Dependent Claim
157 words
In a wrist calculator comprising a generally planar wrist case having opposed faces and opposite ends, a flexible wristband coupled to respective ends of said wrist case, electronic calculator means carried by said case, and including electro-optical display means on one face thereof for optically displaying data during calculator use, battery means for energizing said calculator means and manually operable calculator keyboard means for controlling operation of said calculator means, the improvement wherein: said wristband comprises flexibly joined links and said keyboard means comprises keys carried individually by said links and switch means carried by said links and actuated by said keys, means for electrically connecting said switch means and said battery means to said calculator means, and wherein said keys are of a height generally equal to the height of the links to form single transverse rows on said links and to thereby maximize key area per link to facilitate keyboard operation of the wrist calculator.
Claim 3
Dependent Claim
65 words
The wrist calculator as claimed in claim 1 wherein said links are of planar, rectangular configuration, and said keys are carried on the face of said links corresponding to the face of said case carrying said display means, and cable means extend between said links, being mechanically connected thereto, and including conductor means for connecting said switch means to said calculator means of said case.
Claim 4
Dependent Claim
47 words
The wrist calculator as claimed in claim 2 wherein said cable means comprises inner and outer plastic layers, and said switch means comprises spring biased normally spaced contact means connected to said conductor means and interposed between said insulative said plastic layers, and underlying a depressible key.
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) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |