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US3280310A
Expired / Lapsed
US
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Aircraft landing system
Assignee: North American Aviation Corp
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Filing: 1961-10-13
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Granted: 1966-10-18
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Expires: 1981-10-13
Abstract
No abstract record available.
Inventors
- 👤 Jack W Montooth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:55
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/04; G05D1/06; G05D1/0607; G05D1/0653; G05D1/0676; G06; G06G; G06G7/00; G06G7/48; G06G7/70; G06G7/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A TERMINAL PREDICTION CONTROLLER FOR EFFECTING A TERMINAL CONDITION OF A CONTROLLED ELEMENT AT A PRESELECTED TERMINAL INSTANT IN TIME COMPRISING SENSOR MEANS FOR MEASURING RATE OF CHANGE OF A CONDITION, TIME-DRIVE MEANS FOR PROVIDING AN OUTPUT INDICATION OF THE TIME INTERVAL REMAINING UNTIL SAID PRESELECTED TERMINAL INSTANT, REFERENCE MEANS INDICATING A DESIRED TERMINAL RATE OF CHANGE OF SAID CONDITION, FIRST FUNCTION GENERATOR MEANS DRIVEN BY SAID TIME-DRIVE MEANS AND RESPONSIVE TO SAID SENSOR AND REFERENCE MEANS FOR GENERATING A FIRST SIGNAL REPRESENTING A PREDETERMINED TIME FUNCTION OF THE DIFFERENCE BETWEEN MEASURED RATE OF CHANGE OF SAID CONDITION, AND SAID DESIRED TERMINAL RATE OF CHANGE OF SAID CONDITION, SECOND FUNCTION GENERATOR MEANS DRIVEN BY SAID TIME-DRIVE MEANS FOR GENERATING A SECOND SIGNAL REPRESENTING A PREDETERMINED TIME FUNCTION OF A COMPUTED RATE OF CHANGE OF SAID CONDITION, COMPUTING MEANS RESPONSIVE TO SAID FIRST AND SECOND SIGNALS FOR PROVIDING SAID COMPUTED RATE OF CHANGE OF SAID CONDITION, AND MEANS FOR COMPARING SAID COMPUTED RATE OF CHANGE OF CONDITION WITH SAID MEASURED RATE OF CHANGE OF CONDITION.
Claim 2
Dependent Claim
174 words
A TERMINAL PREDICTION CONTROLLER FOR EFFECTING A TERMINAL CONDITION OF A CONTROLLED ELEMENT AT A PRESELECTED TERMINAL INSTANT IN TIME COMPRISING SENSOR MEANS FOR MEASURING RATE OF CHANGE OF A CONDITION, TIME-DRIVE MEANS FOR PROVIDING AN OUTPUT INDICATION OF THE TIME INTERVAL REMAINING UNTIL SAID PRESELECTED TERMINAL INSTANT, REFERENCE MEANS INDICATING A DESIRED TERMINAL RATE OF CHANGE OF SAID CONDITION, FIRST FUNCTION GENERATOR MEANS DRIVEN BY SAID TIME-DRIVE MEANS AND RESPONSIVE TO SAID SENSOR AND REFERENCE MEANS FOR GENERATING A FIRST SIGNAL REPRESENTING A PREDETERMINED TIME FUNCTION OF THE DIFFERENCE BETWEEN MEASURED RATE OF CHANGE OF SAID CONDITION, AND SAID DESIRED TERMINAL RATE OF CHANGE OF SAID CONDITION, SECOND FUNCTION GENERATOR MEANS DRIVEN BY SAID TIME-DRIVE MEANS FOR GENERATING A SECOND SIGNAL REPRESENTING A PREDETERMINED TIME FUNCTION OF A COMPUTED RATE OF CHANGE OF SAID CONDITION, COMPUTING MEANS RESPONSIVE TO SAID FIRST AND SECOND SIGNALS FOR PROVIDING SAID COMPUTED RATE OF CHANGE OF SAID CONDITION, AND MEANS FOR COMPARING SAID COMPUTED RATE OF CHANGE OF CONDITION WITH SAID MEASURED RATE OF CHANGE OF CONDITION.
References Cited (Backward Citations)
US2401779A
Cited
US2955762A
Cited
US2804264A
Cited
US2965300A
Cited
US3081969A
Cited
US3157783A
Cited
US3026038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |