US3848246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calligraphic symbol generator using digital circuitry
Assignee: Bendix Corp
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Filing: 1971-06-14
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Granted: 1974-11-12
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Expires: 1991-06-14
Abstract
Abstract A symbol generator includes digital circuitry for providing signals which are applied to X and Y deflection and Z axis bright up circuits of a cathode ray tube (CRT) for presenting calligraphically written symbology on the face of the CRT in response to signals from an external source. The symbology is repeated at a predetermined refresh rate to give the illusion of a continuous presentation.
Inventors
- 👤 K Kendall
- 👤 C Telleri
- 👤 L Laniewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:47
CPC Classifications
G; G09; G09G; G09G1/00; G09G1/06; G09G1/08; G09G1/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
142 words
A symbol generator comprising: a first memory device for storing symbol description instructions and for providing first digital signals identifying a partcular type of symbol and second signals indicative of symbol parameter data; a second memory device for storing symbol position instructions and for providing first digital signals which define the position of the symbol relative to one axis and second digital signals which define the position of the symbol relative to another axis normal to the one axis; a plurality of symbol makers connected to the first instruction memory device and controlled by the first and second digital signals therefrom for providing digital symbol description signals; means for combining the first and second digital signals from the second memory device and the digital description signals; and means connected to the combining means for converting the combined digital signals to analog signals.
Claim 2
Dependent Claim
142 words
A symbol generator comprising: a first memory device for storing symbol description instructions and for providing first digital signals identifying a partcular type of symbol and second signals indicative of symbol parameter data; a second memory device for storing symbol position instructions and for providing first digital signals which define the position of the symbol relative to one axis and second digital signals which define the position of the symbol relative to another axis normal to the one axis; a plurality of symbol makers connected to the first instruction memory device and controlled by the first and second digital signals therefrom for providing digital symbol description signals; means for combining the first and second digital signals from the second memory device and the digital description signals; and means connected to the combining means for converting the combined digital signals to analog signals.
Claim 3
Dependent Claim
40 words
A symbol generator as described by claim 1, wherein: the plurality of symbol makers are controlled by the digital signals from the first instruction memory device so that only one of said symbol makers is active at a given instant.
Claim 4
Dependent Claim
70 words
A symbol generator as described by claim 1, including: circuitry connected to selected symbol makers of the plurality of symbol makers and affected thereby for providing symbol maker control and timing logic; said circuitry including means for providing a signal at the completion of a symbol, clock means inhibited by said signal and thereupon providing a control signal, and means responsive to the control signal for controlling the symbol makers.
Claim 5
Dependent Claim
60 words
A symbol generator as described by claim 1 wherein the plurality of symbol makers include: a line maker connected to the first memory device and controlled by the first digital signals for providing digital signals corresponding to the sense of a line, and controlled by the second digital signals for providing digital signals corresponding to the length of the line.
Claim 6
Dependent Claim
64 words
A symbol generator as described by claim 1, wherein the plurality of symbol makers includes: a vector generator connected to the first memory device and controlled by the first digital signals for providing digital signals corresponding to the slope of a vector relative to a reference, and controlled by the second digital signals for providing digital signals corresponding to the length of the vector.
Claim 7
Dependent Claim
56 words
A symbol generator as described by claim 1, wherein the plurality of symbol makers includes: an alphanumeric character generator connected to the first memory device and controlled by the first digital signals for providing digital signals corresponding to a selected character, and controlled by tHe second digital signals for providing digital signals corresponding to character size.
Claim 8
Dependent Claim
59 words
A symbol generator as described by claim 1, wherein the plurality of symbol makers includes: a circle maker connected to the first memory device and controlled by the first digital signals for providing digital signals corresponding to a selected circle and controlled by the second digital signals for providing digital signals corresponding to the radius of the selected circle.
Claim 9
Dependent Claim
44 words
A symbol maker as described by claim 1, wherein the plurality of symbol makers includes: a moving tape symbol maker connected to the first memory device and controlled by the first and second digital signals for providing digital dynamic position and character selection signals.
Claim 10
Dependent Claim
143 words
A symbol maker as described by claim 1, wherein the plurality of symbol makers includes: a line maker connected to the first memory device and controlled by the first digital signals for providing digital signals corresponding to the sense of a line, and controlled by the second digital signals for providing digital signals corresponding to the length of the line; an alphanumeric character generator controlled by the first digital signals for providing digital signals corresponding to a selected character, and controlled by the second digital signals for providing digital signals corresponding to the character size; a moving tape symbol maker controlled by the first and the second digital signals for providing digital dynamic scale position and character select signals; and the line maker and character generator connected to the moving tape symbol maker for generating the scale in response to the signals therefrom.
References Cited (Backward Citations)
US3394367A
Cited
US3423626A
Cited
US3603964A
Cited
US3569951A
Cited
US3637997A
Cited
US3510865A
Cited
US3597757A
Cited
US3602702A
Cited
US3641544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |