Patent US4228598A successfully refreshed from Google Patents.
US4228598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar simulation apparatus
Assignee: UK Secretary of State for Defence
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Filing: 1977-09-16
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Granted: 1980-10-21
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Expires: 1997-09-16
Abstract
Abstract According to the invention there is provided radar simulation apparatus comprising an oscilloscope having a display screen, said oscilloscope producing a luminous movable screen spot, scanning means connected to the oscilloscope for causing the spot to be scanned over said screen in a radar transmitter type scanning pattern, a photo-detector mounted in front of the screen for detecting light from said spot only when said spot is near the photo-detector and for producing an electrical signal when said light is detected, and modulation means connected to receive and modulate said electrical signal in simulation of a radar pulse repetition.
Inventors
- 👤 Richard T. Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:57
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/54
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
104 words
Radar simulation apparatus comprising a cathode ray tube oscilloscope having a display screen, said oscilloscope having means for producing a movable screen spot, scanning means connected to the oscilloscope for causing the spot to be scanned over the screen in a radar transmitter type scanning pattern, photo-detector means mounted in front of the screen and closely adjacent or on said screen for detecting light from said spot only when said spot is near said photo-detector means and for producing an electrical signal when said light is detected, and modulation means connected to receive and modulate said signal in simulation of a radar pulse repetition.
Claim 2
Dependent Claim
104 words
Radar simulation apparatus comprising a cathode ray tube oscilloscope having a display screen, said oscilloscope having means for producing a movable screen spot, scanning means connected to the oscilloscope for causing the spot to be scanned over the screen in a radar transmitter type scanning pattern, photo-detector means mounted in front of the screen and closely adjacent or on said screen for detecting light from said spot only when said spot is near said photo-detector means and for producing an electrical signal when said light is detected, and modulation means connected to receive and modulate said signal in simulation of a radar pulse repetition.
Claim 3
Dependent Claim
23 words
Apparatus as in claim 1 wherein the modulation means comprises a pulse generator for modulating the intensity of the spot on the screen.
Claim 4
Dependent Claim
26 words
Apparatus as in claim 1 wherein said photo-detector means comprises an array of photo-sensitive devices having combined outputs whereby a wide radar beam may be simulated.
Claim 5
Dependent Claim
14 words
Apparatus as in claim 1 wherein said photo-detector means comprises at least one photo-transistor.
Claim 6
Dependent Claim
24 words
Apparatus as in claim 1 further including displacement means associated with said scanning means for displacing the scanning pattern relative to said photo-detector means.
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) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |