US3980823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keyboard for bar matrix code
Assignee: Individual
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Filing: 1975-06-09
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Granted: 1976-09-14
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Expires: 1995-06-09
Abstract
Abstract A keyboard for generating alpha-numeric character data for an output device such as a printer or display or transmission line or memory or the like. A keyboard with five sets of keys for operation with one hand to produce an eight bar matrix character code, with the sets positioned in a row and with the central sets selectively providing upper, lower and combination of upper and lower bars of the matrix.
Inventors
- 👤 Lawrence K. Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:11
CPC Classifications
H; H03; H03M; H03M11/00; H01; H01H; H01H13/00; H01H13/70; H01H13/84
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
184 words
In a keyboard for producing bar matrix coded alpha-numeric data, with the bar matrix comprising four outer bars in a rectangular pattern and four inner bars radiating from the center of the rectangle to the corners of the rectangle, the combination of five sets of keys in side by side relation for actuation by the respective five fingers of an operator's hand, the first set comprising a key corresponding to the left vertical bar of said matrix, the second set comprising at least one key positioned to the right of said first set and corresponding to the two left inner bars of said matrix, the third set comprising at least one key positioned to the right of said second set and corresponding to the upper and lower horizontal bars of said matrix, the fourth set comprising at least one key positioned to the right of said third set and corresponding to the two right inner bars of said matrix, and the fifth set comprising a key positioned to the right of said fourth set and corresponding to the right vertical bar of said matrix.
Claim 2
Dependent Claim
184 words
In a keyboard for producing bar matrix coded alpha-numeric data, with the bar matrix comprising four outer bars in a rectangular pattern and four inner bars radiating from the center of the rectangle to the corners of the rectangle, the combination of five sets of keys in side by side relation for actuation by the respective five fingers of an operator's hand, the first set comprising a key corresponding to the left vertical bar of said matrix, the second set comprising at least one key positioned to the right of said first set and corresponding to the two left inner bars of said matrix, the third set comprising at least one key positioned to the right of said second set and corresponding to the upper and lower horizontal bars of said matrix, the fourth set comprising at least one key positioned to the right of said third set and corresponding to the two right inner bars of said matrix, and the fifth set comprising a key positioned to the right of said fourth set and corresponding to the right vertical bar of said matrix.
Claim 3
Dependent Claim
56 words
A keyboard as defined in claim 1 wherein each of said second, third and fourth sets comprises a pair of keys positioned one above the other with each key corresponding to a separate bar of said matrix and with the keys of a pair adjacent each other for simultaneous and individual operation by a single finger.
Claim 4
Dependent Claim
59 words
A keyboard as defined in claim 1 wherein each of said second, third and fourth sets comprises a single key, with each of said single keys having three operative positions comprising an away position corresponding to the upper of the bars, a down position corresponding to both bars, and a toward position corresponding to the lower of the bars.
Claim 5
Dependent Claim
53 words
A keyboard as defined in claim 1 wherein each of said second, third and fourth sets comprises three keys positioned one above the other with the upper key corresponding to the upper of the bars, the central key corresponding to both bars, and the lower key corresponding to the lower of the bars.
Claim 6
Dependent Claim
26 words
A keyboard as defined in claim 1 and a second keyboard having said five sets of keys and positioned to one side of said one keyboard.
Claim 7
Dependent Claim
47 words
A keyboard as defined in claim 1 including: switches closed by said keys when actuated; means for connecting said switches to a storage unit for storing switch closure data; and means for transmitting said switch closure data from said storage unit when the actuated keys are released.
Claim 8
Dependent Claim
24 words
A keyboard as defined in claim 6 including a translator unit for converting the character code of said keyboard to a different character code.
Claim 9
Dependent Claim
42 words
A keyboard as defined in claim 1 including: an illuminated display having eight bars corresponding to the bars of said matrix; and means for energizing a bar of said display when the key of the corresponding bar of said matrix is actuated.
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) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |