US3996584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data handling system having a plurality of interrelated character generators
Assignee: Unisys Corp
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Filing: 1975-01-17
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Granted: 1976-12-07
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Expires: 1995-01-17
Abstract
Abstract The system includes at least two character generators, one for U.S. alphanumeric symbols, and the other for systems which use a majority of U.S. symbols, but each of which has a group of unique characters, also. A logic circuit steers the incoming data signals to one character generator or the other.
Inventors
- 👤 Malcolm Plager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:17
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/22; G09G5/24; G09G1/00; G09G1/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
347 words
A data handling and displaying system comprising a display device for providing a visual display of characters, a source of data signals to be processed and displayed on said display device, said data signals including signals representing a first set of characters and other signals representing a plurality of different sets of characters, said source of data signals being coupled to a first circuit path including a first character generator having an input and an output, said first character generator being adapted to generate electrical display signals representative of a first set of characters, a connection from said source of data signals to the input of said first character generator, said first character generator having its output coupled to said display device for applying said first set of electrical display signals thereto, said source of data signals being coupled to a second circuit path including a second character generator having an input and an output, said second character generator being adapted to generate electrical display signals representative of a plurality of sets of characters different from said first set of characters, the output of said second character generator being coupled to said display device, a full adder having an input and an output, the output of said full adder being coupled to the input of said second character generator, an encoder having an input and an output, a selector circuit having an output, the output of said encoder and the output of said selector circuit being coupled to the input of said full adder, a connection from said source of data signals to the input of said encoder, a character generator control circuit, and a connection from said encoder to said character generator control circuit and separate connections from said character generator control circuit to said first and second character generators whereby, if said source of data signals provides signals representing said first set of characters, then said first character generator is enabled and, if said source of data signals provides signals representing one of said different sets of characters, then said second character generator is enabled.
Claim 2
Dependent Claim
347 words
A data handling and displaying system comprising a display device for providing a visual display of characters, a source of data signals to be processed and displayed on said display device, said data signals including signals representing a first set of characters and other signals representing a plurality of different sets of characters, said source of data signals being coupled to a first circuit path including a first character generator having an input and an output, said first character generator being adapted to generate electrical display signals representative of a first set of characters, a connection from said source of data signals to the input of said first character generator, said first character generator having its output coupled to said display device for applying said first set of electrical display signals thereto, said source of data signals being coupled to a second circuit path including a second character generator having an input and an output, said second character generator being adapted to generate electrical display signals representative of a plurality of sets of characters different from said first set of characters, the output of said second character generator being coupled to said display device, a full adder having an input and an output, the output of said full adder being coupled to the input of said second character generator, an encoder having an input and an output, a selector circuit having an output, the output of said encoder and the output of said selector circuit being coupled to the input of said full adder, a connection from said source of data signals to the input of said encoder, a character generator control circuit, and a connection from said encoder to said character generator control circuit and separate connections from said character generator control circuit to said first and second character generators whereby, if said source of data signals provides signals representing said first set of characters, then said first character generator is enabled and, if said source of data signals provides signals representing one of said different sets of characters, then said second character generator is enabled.
Claim 3
Dependent Claim
35 words
The apparatus defined in claim 1 and including means coupled to the input of said full adder for causing said full adder to provide output signals representing one set of said different sets of characters.
Claim 4
Dependent Claim
37 words
The apparatus defined in claim 2 wherein said means includes switch means for setting the logic in said full adder to provide, at the output of said full adder, signals representing said one set of different characters.
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) | 1979-12-07 | 1980-06-07 | 1980-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-07 | 1984-06-07 | 1984-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-07 | 1988-06-07 | 1988-12-07 | $7700.00 | Window Closed / Lapsed |