US3228027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pitch and roll corrector for use in a doppler radar navigation system
Assignee: Bendix Corp
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Filing: 1961-11-02
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Granted: 1966-01-04
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Expires: 1981-11-02
Abstract
No abstract record available.
Inventors
- 👤 Robert M Milnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:49
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A DOPPLER NAVIGATION SYSTEM COMPRISING ANTENNA MEANS FOR RADIATING AND RECEIVING ENERGY BEAMS IN FIXED ANGULAR RELATION TO AN AIRCRAFT, MEANS RESPONSIVE TO DOPPLER DATA FROM SAID BEAMS FOR GENERATING FREQUENCIES REPRESENTATIVE OF THE COMPONENTS OF VELOCITY OF SAID AIRCRAFT, A VOLTAGE TUNED GROUND SPEED OSCILLATOR, MEANS FOR COMPARING THE FREQUENCY OF SAID GROUND SPEED OSCILLATOR WITH A PREDETERMINED FUNCTION OF SAID GENERATED FREQUENCIES AND GENERATING AN ERROR SIGNAL HAVING MAGNITUDE AND SENSE REPRESENTING THE DIFFERENCE BETWEEN THE COMPARED QUANTITIES, AN ADJUSTABLE VOLTAGE SOURCE CONNECTED TO CONTROL THE FREQUENCY OF SAID GROUND SPEED OSCILLATOR, MEANS RESPONSIVE TO SAID ERROR SIGNAL FOR ADJUSTING SAID VOLTAGE SOURCE TO NULL SAID ERROR SIGNAL, AND MEANS FOR MODIFYING BY A FACTOR PROPORTIONAL TO THE COSINE OF THE ANGLE OF PITCH OF SAID AIRCRAFT THE ADJUSTMENT OF SAID VOLTAGE SOURCE REQUIRED TO OBTAIN SAID NULL.
Claim 2
Dependent Claim
140 words
A DOPPLER NAVIGATION SYSTEM COMPRISING ANTENNA MEANS FOR RADIATING AND RECEIVING ENERGY BEAMS IN FIXED ANGULAR RELATION TO AN AIRCRAFT, MEANS RESPONSIVE TO DOPPLER DATA FROM SAID BEAMS FOR GENERATING FREQUENCIES REPRESENTATIVE OF THE COMPONENTS OF VELOCITY OF SAID AIRCRAFT, A VOLTAGE TUNED GROUND SPEED OSCILLATOR, MEANS FOR COMPARING THE FREQUENCY OF SAID GROUND SPEED OSCILLATOR WITH A PREDETERMINED FUNCTION OF SAID GENERATED FREQUENCIES AND GENERATING AN ERROR SIGNAL HAVING MAGNITUDE AND SENSE REPRESENTING THE DIFFERENCE BETWEEN THE COMPARED QUANTITIES, AN ADJUSTABLE VOLTAGE SOURCE CONNECTED TO CONTROL THE FREQUENCY OF SAID GROUND SPEED OSCILLATOR, MEANS RESPONSIVE TO SAID ERROR SIGNAL FOR ADJUSTING SAID VOLTAGE SOURCE TO NULL SAID ERROR SIGNAL, AND MEANS FOR MODIFYING BY A FACTOR PROPORTIONAL TO THE COSINE OF THE ANGLE OF PITCH OF SAID AIRCRAFT THE ADJUSTMENT OF SAID VOLTAGE SOURCE REQUIRED TO OBTAIN SAID NULL.
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |