US3141161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calibrated radar altitude control which compensates for changes in ground reflectivity
Assignee: RTX Corp
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Filing: 1959-05-11
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Granted: 1964-07-14
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Expires: 1979-05-11
Abstract
No abstract record available.
Inventors
- 👤 Kenneth L King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:38
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/93; G01S13/933; G01S13/935; G01S13/02; G01S13/06; G01S13/08; G01S7/00; G01S7/02; G01S7/40; G01S7/4052; G01S7/4082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A RADAR ALTITUDE CONTROL SYSTEM FOR PRODUCING A COMMAND SIGNAL FOR DIRECTING AN AIRCRAFT TO A DESIRED ALTITUDE INCLUDING IN COMBINATION AN ANTENNA, MEANS MOUNTING SAID ANTENNA ON SAID AIRCRAFT, A RADAR TRANSMITTER, MEANS COUPLING SAID TRANSMITTER TO SAID ANTENNA, MEANS FOR PRODUCING A FIRST ELECTRICAL SIGNAL HAVING AN AMPLITUDE VARYING AS A FUNCTION OF TRANSMITTED POWER, A RADAR RECEIVER, MEANS INCLUDING SAID RECEIVER FOR PRODUCING A SECOND ELECTRICAL SIGNAL HAVING AN AMPLITUDE VARY AS A FUNCTION OF RECEIVED POWER, MEANS FOR COMPARING THE AMPLITUDES OF SAID FIRST AND SECOND SIGNALS TO PRODUCE SAID COMMAND SIGNAL, MEANS FOR PRODUCING A THIRD SIGNAL PROPORTIONAL TO THE ACTUAL ALTITUDE OVER THE GROUND OF SAID ARICRAFT INDEPENDENT OF VARIATIONS IN GROUND REFLECTIVITY AND MEANS RESPONSIVE TO SAID THIRD SIGNAL FOR VARYING THE AMPLITUDE OF ONE OF SAID FIRST AND SECOND SIGNALS TO COMPENSATE FOR VARIATIONS IN GROUND REFLECTIVITY.
Claim 2
Dependent Claim
145 words
A RADAR ALTITUDE CONTROL SYSTEM FOR PRODUCING A COMMAND SIGNAL FOR DIRECTING AN AIRCRAFT TO A DESIRED ALTITUDE INCLUDING IN COMBINATION AN ANTENNA, MEANS MOUNTING SAID ANTENNA ON SAID AIRCRAFT, A RADAR TRANSMITTER, MEANS COUPLING SAID TRANSMITTER TO SAID ANTENNA, MEANS FOR PRODUCING A FIRST ELECTRICAL SIGNAL HAVING AN AMPLITUDE VARYING AS A FUNCTION OF TRANSMITTED POWER, A RADAR RECEIVER, MEANS INCLUDING SAID RECEIVER FOR PRODUCING A SECOND ELECTRICAL SIGNAL HAVING AN AMPLITUDE VARY AS A FUNCTION OF RECEIVED POWER, MEANS FOR COMPARING THE AMPLITUDES OF SAID FIRST AND SECOND SIGNALS TO PRODUCE SAID COMMAND SIGNAL, MEANS FOR PRODUCING A THIRD SIGNAL PROPORTIONAL TO THE ACTUAL ALTITUDE OVER THE GROUND OF SAID ARICRAFT INDEPENDENT OF VARIATIONS IN GROUND REFLECTIVITY AND MEANS RESPONSIVE TO SAID THIRD SIGNAL FOR VARYING THE AMPLITUDE OF ONE OF SAID FIRST AND SECOND SIGNALS TO COMPENSATE FOR VARIATIONS IN GROUND REFLECTIVITY.
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) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |