Patent US3132244A successfully refreshed from Google Patents.
US3132244A
Expired / Lapsed
US
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Error correction circuit for discontinuous functions
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1961-06-20
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Granted: 1964-05-05
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Expires: 1981-06-20
Abstract
No abstract record available.
Inventors
- 👤 Kemmer John Paul
- 👤 Robert E Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:36
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN AN AIR DATA COMPUTER, MEANS FOR DETECTING TOTAL PRESSURE, MEANS FOR DETECTING INDICATED STATIC PRESSURE, MEANS FOR PROVIDING TWO OVERLAPPING CORRECTION SIGNALS FOR INDICATED STATIC PRESSURE, ONE OF WHICH IS APPLICABLE AT SPEEDS ABOVE MACH 1 AND THE OTHER BEING APPLICABLE AT SPEEDS BELOW MACH 1, MEANS FOR DETERMINING THE RATIO OF TOTAL PRESSURE AND INDICATED STATIC PRESSURE ONLY, SAID RATIO HAVING A DISCONTINUITY NEAR MACH 1 WHERE THE RATIO JUMPS FROM A FIRST LEVEL TO A SECOND LEVEL THROUGH A MID-VALUE WHICH IS SUBSTANTIALLY INDEPENDENT OF OTHER FLIGHT CONDITIONS, MEANS FOR PROVIDING AN OUTPUT SIGNAL INDICATING WHETHER THIS RATIO IS ABOVE OR BELOW THE MID-VALVE LEVEL, AND MEANS RESPONSIVE TO SAID OUTPUT SIGNAL FOR SWITCHING FROM ONE OF SAID STATIC PRESSURE CORRECTION SIGNALS TO THE OTHER.
Claim 2
Dependent Claim
128 words
IN AN AIR DATA COMPUTER, MEANS FOR DETECTING TOTAL PRESSURE, MEANS FOR DETECTING INDICATED STATIC PRESSURE, MEANS FOR PROVIDING TWO OVERLAPPING CORRECTION SIGNALS FOR INDICATED STATIC PRESSURE, ONE OF WHICH IS APPLICABLE AT SPEEDS ABOVE MACH 1 AND THE OTHER BEING APPLICABLE AT SPEEDS BELOW MACH 1, MEANS FOR DETERMINING THE RATIO OF TOTAL PRESSURE AND INDICATED STATIC PRESSURE ONLY, SAID RATIO HAVING A DISCONTINUITY NEAR MACH 1 WHERE THE RATIO JUMPS FROM A FIRST LEVEL TO A SECOND LEVEL THROUGH A MID-VALUE WHICH IS SUBSTANTIALLY INDEPENDENT OF OTHER FLIGHT CONDITIONS, MEANS FOR PROVIDING AN OUTPUT SIGNAL INDICATING WHETHER THIS RATIO IS ABOVE OR BELOW THE MID-VALVE LEVEL, AND MEANS RESPONSIVE TO SAID OUTPUT SIGNAL FOR SWITCHING FROM ONE OF SAID STATIC PRESSURE CORRECTION SIGNALS TO THE OTHER.
References Cited (Backward Citations)
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Cited
US2969910A
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US3002382A
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US3043142A
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US2985012A
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US3039305A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |