US3579234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Character generator for radar display
Assignee: Japan Radio Co Ltd
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Filing: 1969-05-14
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Granted: 1971-05-18
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Expires: 1989-05-14
Abstract
Abstract A character-generating system for use with a radar system wherein coded radial element signals and coded circular element signals are generated in response to the trigger and heading signals, respectively, generated by the radar system. The coded radial and circular element signals are combined to form a plurality of pattern signals representing a plurality of characters. The pattern signals are then selected and combined with the video radar information to form a composite signal which is fed to the radar display.
Inventors
- 👤 Takao Tsumura
- 👤 Toshio Kaooka
- 👤 Keisuke Suzuki
- 👤 Yoshiaki Ueda
- 👤 Naoyoshi Oishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:17
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S7/06; G01S7/22
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
165 words
Electronic character-generating system for a radar system generating first and second reference signals, comprising: a radial signal encoder channel responsive to said first reference signal for generating coded radial element signals; a circular signal encoder channel responsive to said second reference signal for generating coded circular element signals; means coupled to said radial and circular signal encoder channels for generating a plurality of pattern signals representing a plurality of characters from said coded circular element signals and coded radial element signals; a pattern signal selector for selecting predetermined pattern signals from said plurality of pattern signals; character-positioning means for combining character position information signals with said selected pattern signals to position said selected pattern signals at a desired position on the display of said radar system; and means for mixing the output signals from said characterpositioning means with radar video signals from said radar system to form composite signals, said composite signals being transmitted to said radar system and displayed on the radar display thereof.
Claim 2
Dependent Claim
165 words
Electronic character-generating system for a radar system generating first and second reference signals, comprising: a radial signal encoder channel responsive to said first reference signal for generating coded radial element signals; a circular signal encoder channel responsive to said second reference signal for generating coded circular element signals; means coupled to said radial and circular signal encoder channels for generating a plurality of pattern signals representing a plurality of characters from said coded circular element signals and coded radial element signals; a pattern signal selector for selecting predetermined pattern signals from said plurality of pattern signals; character-positioning means for combining character position information signals with said selected pattern signals to position said selected pattern signals at a desired position on the display of said radar system; and means for mixing the output signals from said characterpositioning means with radar video signals from said radar system to form composite signals, said composite signals being transmitted to said radar system and displayed on the radar display thereof.
Claim 3
Dependent Claim
18 words
System according to claim 1, wherein said first and second reference signals are trigger and heading signals, respectively.
Claim 4
Dependent Claim
46 words
System according to claim 1, wherein said pattern signal generating means includes: means for deriving segment signals from said coded circular element signals and coded radial element signals; and meanS for comprising said segment signals into said plurality of pattern signals representing a plurality of characters.
Claim 5
Dependent Claim
103 words
System according to claim 1, wherein said radial signal encoder channel includes: a radial delay circuit coupled to receive said first reference signal from said radar system and delaying said first reference signal for a first predetermined period of time; a radial oscillator responsive to the output of said radial delay circuit for generating a plurality of radial element signals; a radial element encoder for encoding said radial element signals into coded radial element signals; and means responsive to an output from said radial element encoder to turn off said radial oscillator after a predetermined number of radial element signals have been generated.
Claim 6
Dependent Claim
58 words
System according to claim 4, wherein said means for turning off said radial oscillator includes a gate circuit coupled between said radial delay circuit and said radial oscillator, said gate circuit being responsive to said radial element encoder output to cause said radial oscillator to be turned off after generation of said predetermined number of radial element signals.
Claim 7
Dependent Claim
76 words
System according to claim 1, wherein said circular signal encoder channel includes: a circular delay circuit coupled to receive said second reference signal from said radar system and delaying said second reference signal for a second predetermined period of time; a circular oscillator responsive to the output of said circular delay circuit for generating a plurality of circular element signals; and a circular element encoder for encoding said circular element signals into coded circular element signals.
Claim 8
Dependent Claim
21 words
System according to claim 6, further comprising a second gating circuit coupled between said circular delay circuit and said circular oscillator.
Claim 9
Dependent Claim
103 words
System according to claim 7, wherein said radial signal encoder channel includes: a radial delay circuit coupled to receive said first reference signal from said radar system and delaying said first reference signal for a first predetermined period of time; a radial oscillator responsive to the output of said radial delay circuit for generating a plurality of radial element signals; a radial element encoder for encoding said radial element signals into coded radial element signals; and means responsive to an output from said radial element encoder to turn off said radial oscillator after a predetermined number of radial element signals have been generated.
Claim 10
Dependent Claim
28 words
System according to claim 8, further comprising: a timing circuit; and means feeding an output of said circular delay circuit to said timing circuit as a trigger signal.
Claim 11
Dependent Claim
26 words
System according to claim 8, further comprising means coupling an output of said circular element signal encoder to said character positioning means as a trigger signal.
Claim 12
Dependent Claim
43 words
System according to claim 8, further comprising means coupling a signal from said character-positioning means to said second gating circuit to cause said second gating circuit to turn off said circular oscillator after signals representing a predetermined number of characters have been generated.
Claim 13
Dependent Claim
28 words
System according to claim 3, wherein said deriving means includes a signal mixer for logically combining said coded circular and coded radial element signals into said segment signals.
Claim 14
Dependent Claim
23 words
System according to claim 12, wherein said composing means includes means for logically combining said segment signals into pattern signals representing predetermined characters.
Claim 15
Dependent Claim
35 words
System according to claim 1, further comprising a source of timing signals coupled to said pattern signal selector, said pattern signal selector selecting predetermined pattern signals in accordance with the outputs from said timing means.
Claim 16
Dependent Claim
37 words
System according to claim 14, wherein said timing means includes: a time signal generator generating a plurality of types of timing signals; and means coupling said plurality Of types of timing signals to said pattern signal selector.
Claim 17
Dependent Claim
37 words
System according to claim 15, further comprising a time memory coupling said plurality of types of time signals to said pattern signal selector, said time memory including means for memorizing said plurality of types of time signals.
Claim 18
Dependent Claim
26 words
System according to claim 16, further comprising means coupling a trigger signal from said circular delay circuit to said time memory to enable said time memory.
Claim 19
Dependent Claim
26 words
System according to claim 1, wherein said pattern signal selector includes a manual pattern signal selector having a plurality of switches for preselecting predetermined pattern signals.
Claim 20
Dependent Claim
40 words
System according to claim 14, further comprising means coupling the output of said timing means to said character-positioning means, said character-positioning means logically combining said pattern signals with said time signals into a pulse train signal which represents predetermined characters.
References Cited (Backward Citations)
US3182308A
Cited
US3444319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |