US3197777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tactical radio landing system
Assignee: GEN PREICSION Inc
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Filing: 1961-11-29
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Granted: 1965-07-27
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Expires: 1981-11-29
Abstract
No abstract record available.
Inventors
- 👤 Michael W Mckay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:56
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/422; G01S1/00; G01S1/02; G01S1/08; G01S1/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
213 words
A RADIO LANDING SYSTEM COMPRISING, A GROUND BASED TRANSMITTER INCLUDING A MICROWAVE GENERATOR, A LOCAL OSCILLATOR, MEANS FOR FREQUENCY MODULATING SAID LOCAL OSCILLATOR, MEANS FOR AMPLITUDE MODULATING THE OUTPUT OF SAID MICROWAVE GENERATOR BY THE FREQUENCY MODULATED OUTPUT OF SAID LOCAL OSCILLATOR, MEANS FOR RADIATING SAID MODULATED SIGNAL IN A DIRECTED BEAM, MEANS FOR ROTATING SAID BEAM ABOUT A SELECTED AXIS AT A RATE OF ROTATION EQUAL TO THE FREQUENCY OF SAID FREQUENCY MODULATION, THE APEX ANGLE OF THE CONE OF ROTATION BEING SUBSTANTIALLY EQUAL TO THE WIDTH OF SAID DIRECTED BEAM BETWEEN HALF-POWER POINTS, AN AIRBORNE RECEIVER INCLUDING AN AMPLITUDE MODULATION DETECTOR DERIVING A SIGNAL FROM SAID BEAM THE FREQUENCY OF WHICH IS DEPENDENT ON THE RATE OF ROTATION OF SAID BEAM, A FREQUENCY MODULATION DETECTOR PRODUCING AN OUTPUT SIGNAL HAVING A FREQUENCY EQUAL TO THE FREQUENCY MODULATION OF SAID TRANSMITTER, A FIRST PHASE DETECTOR HAVING THE OUTPUT OF SAID AMPLITUDE MODULATION DETECTOR AND THE OUTPUT OF SAID FREQUENCY MODULATION DETECTOR IMPOSED THEREON, A 90* PHASE SHIFTER HAVING THE OUTPUT OF SAID FREQUENCY MODULATION DETECTOR IMPOSED THEREON, A SECOND PHASE DETECTOR HAVING THE OUTPUT OF SAID AMPLITUDE MODULATION DETECTOR AND THE OUTPUT OF SAID PHASE SHIFTER IMPOSED THEREON, AND INDICATOR MEANS ENERGIZED BY THE OUTPUTS OF SAID FIRST AND SECOND PHASE DETECTORS.
Claim 2
Dependent Claim
213 words
A RADIO LANDING SYSTEM COMPRISING, A GROUND BASED TRANSMITTER INCLUDING A MICROWAVE GENERATOR, A LOCAL OSCILLATOR, MEANS FOR FREQUENCY MODULATING SAID LOCAL OSCILLATOR, MEANS FOR AMPLITUDE MODULATING THE OUTPUT OF SAID MICROWAVE GENERATOR BY THE FREQUENCY MODULATED OUTPUT OF SAID LOCAL OSCILLATOR, MEANS FOR RADIATING SAID MODULATED SIGNAL IN A DIRECTED BEAM, MEANS FOR ROTATING SAID BEAM ABOUT A SELECTED AXIS AT A RATE OF ROTATION EQUAL TO THE FREQUENCY OF SAID FREQUENCY MODULATION, THE APEX ANGLE OF THE CONE OF ROTATION BEING SUBSTANTIALLY EQUAL TO THE WIDTH OF SAID DIRECTED BEAM BETWEEN HALF-POWER POINTS, AN AIRBORNE RECEIVER INCLUDING AN AMPLITUDE MODULATION DETECTOR DERIVING A SIGNAL FROM SAID BEAM THE FREQUENCY OF WHICH IS DEPENDENT ON THE RATE OF ROTATION OF SAID BEAM, A FREQUENCY MODULATION DETECTOR PRODUCING AN OUTPUT SIGNAL HAVING A FREQUENCY EQUAL TO THE FREQUENCY MODULATION OF SAID TRANSMITTER, A FIRST PHASE DETECTOR HAVING THE OUTPUT OF SAID AMPLITUDE MODULATION DETECTOR AND THE OUTPUT OF SAID FREQUENCY MODULATION DETECTOR IMPOSED THEREON, A 90* PHASE SHIFTER HAVING THE OUTPUT OF SAID FREQUENCY MODULATION DETECTOR IMPOSED THEREON, A SECOND PHASE DETECTOR HAVING THE OUTPUT OF SAID AMPLITUDE MODULATION DETECTOR AND THE OUTPUT OF SAID PHASE SHIFTER IMPOSED THEREON, AND INDICATOR MEANS ENERGIZED BY THE OUTPUTS OF SAID FIRST AND SECOND PHASE DETECTORS.
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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |