US3611346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable rate line generator
Assignee: Lockheed Martin Corp
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Filing: 1969-04-21
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Granted: 1971-10-05
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Expires: 1989-04-21
Abstract
Abstract A computer controlled multistation display system utilizing a single display generator unit time shared by display indicators which have different writing rates. The display generator includes a register bank which receives and holds display indicator select and writing rate information as well as symbol tracing information. A control section routes the display select information to a display selector and the writing rate and the symbol tracing information to a function generator which produces X-, Y- and Z-axis modulating signals at a rate which corresponds to the writing rate information. The display selector routes the generated X, Y and Z signals to a display indicator having a writing rate corresponding to the rate at which the X, Y and Z signals are produced. The function generator is illustrated as including a line generator having circuitry for varying the rate at which lines or vectors are written on the display surface of the indicator.
Inventors
- 👤 Robert D Stoddard
- 👤 Arnold Schumacher
- 👤 John R Longland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:40
CPC Classifications
G; G09; G09G; G09G1/00; G09G1/06; G09G1/08; G09G1/10
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
62 words
The combination comprising: signal-providing means for producing a sequence of different valued constant currents; ramp-generating means receiving said current sequence to generate a like sequence of voltage ramps which sweep between first and second voltage values and which have different slopes for each different current value; and means coupled to the ramp-generating means for changing the slopes of said voltage ramp sequence.
Claim 2
Dependent Claim
62 words
The combination comprising: signal-providing means for producing a sequence of different valued constant currents; ramp-generating means receiving said current sequence to generate a like sequence of voltage ramps which sweep between first and second voltage values and which have different slopes for each different current value; and means coupled to the ramp-generating means for changing the slopes of said voltage ramp sequence.
Claim 3
Dependent Claim
59 words
The invention according to claim 1 wherein said ramp-generating means includes a first capacitor coupled to receive said current sequence so as to generate said ramp sequence thereacross; and wherein said means for changing includes a plurality of additional capacitors and switching means for selectively coupling selected ones of said additional capacitors across said first capacitor in predetermined combinations.
Claim 4
Dependent Claim
27 words
first conversion means for converting said first signal set to a sequence of constant currents, the values of which are a function of the first signal set,
Claim 5
Dependent Claim
27 words
first conversion means for converting said first signal set to a sequence of constant currents, the values of which are a function of the first signal set,
Claim 6
Dependent Claim
33 words
ramp-generating means for receiving said current sequence to generate a like sequence of voltage ramps which sweep between first and second voltage values and which have different slopes for each different current value,
Claim 7
Dependent Claim
33 words
ramp-generating means for receiving said current sequence to generate a like sequence of voltage ramps which sweep between first and second voltage values and which have different slopes for each different current value,
Claim 8
Dependent Claim
68 words
The invention according to claim 2 wherein signal providing means includes means for providing first and second sets of digital data, means for converting the first set of digital data to said sequence of constant currEnts; and wherein said switching means responds to the second set of digital data whereby any selected one of said predetermined combinations correspond to the numeric value of the second digital data set.
Claim 9
Dependent Claim
37 words
The combination comprising means for providing an instruction set; line generator means responsive to said instruction set to provide X- and Y-axis modulation signals for application to a display indicator at variable rates, said line generator including
Claim 10
Dependent Claim
37 words
The combination comprising means for providing an instruction set; line generator means responsive to said instruction set to provide X- and Y-axis modulation signals for application to a display indicator at variable rates, said line generator including
Claim 11
Dependent Claim
22 words
second conversion means responding to said first signal set and said voltage ramp sequence to provide said X- and Y-axis signals; and
Claim 12
Dependent Claim
22 words
second conversion means responding to said first signal set and said voltage ramp sequence to provide said X- and Y-axis signals; and
Claim 13
Dependent Claim
36 words
rate varying means responsive to said second signal set and coupled to said ramp generator means to generate said voltage ramp sequence at a rate which corresponds to the numeric value of the second signal set.
Claim 14
Dependent Claim
36 words
rate varying means responsive to said second signal set and coupled to said ramp generator means to generate said voltage ramp sequence at a rate which corresponds to the numeric value of the second signal set.
Claim 15
Dependent Claim
71 words
The invention according to claim 4 wherein said ramp-generating means includes a first capacitor coupled to receive said current sequence so as to generate said ramp sequence thereacross; and wherein said rate-varying means includes a plurality of additional capacitors and switching means which responds to said second signal set to couple selected ones of said additional capacitors across said first capacitor in accordance with the value of said second signal set.
Claim 16
Dependent Claim
211 words
Display apparatus comprising: first and second display indicators responsive to X- and Y-axis modulation to trace lines on their respective display services at first and second writing rates, respectively; a data source for providing instructions including indicator select fields indicative of said first and second indicators, writing rate fields indicative of said first and second writing rates and line trace fields; first conversion means for converting said line trace fields to a sequence of constant currents, the values of which are a function of said line trace fields; a ramp generator for receiving said current sequence to generate a like sequence of voltage ramps which sweep between first and second voltage values and which have different slopes for each different current value; second conversion means responding to said voltage ramp sequence and said line trace fields to provide X- and Y-axis signals; rate-varying means responsive to said writing rate field and coupled to said ramp generator to generate said voltage ramp sequence at either said first or said second writing rate; and a display selector switch coupled to said data source and responsive to said indicator select fields to couple said X and Y modulation signals produced at said first and second writing rates to said first and second indicators, respectively.
Claim 17
Dependent Claim
211 words
Display apparatus comprising: first and second display indicators responsive to X- and Y-axis modulation to trace lines on their respective display services at first and second writing rates, respectively; a data source for providing instructions including indicator select fields indicative of said first and second indicators, writing rate fields indicative of said first and second writing rates and line trace fields; first conversion means for converting said line trace fields to a sequence of constant currents, the values of which are a function of said line trace fields; a ramp generator for receiving said current sequence to generate a like sequence of voltage ramps which sweep between first and second voltage values and which have different slopes for each different current value; second conversion means responding to said voltage ramp sequence and said line trace fields to provide X- and Y-axis signals; rate-varying means responsive to said writing rate field and coupled to said ramp generator to generate said voltage ramp sequence at either said first or said second writing rate; and a display selector switch coupled to said data source and responsive to said indicator select fields to couple said X and Y modulation signals produced at said first and second writing rates to said first and second indicators, respectively.
Claim 18
Dependent Claim
62 words
The invention according to claim 6 wherein said ramp generator includes a first capacitor coupled to receive said current sequence so as to generate said voltage ramp sequence thereacross; and wherein said rate-varying means includes a plurality of additional capacitors and switching means which responds to said writing rate field to couple selected ones of said additional capacitors across said first capacitor.
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |