US3287724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Obstacle clearance system for aircraft
Assignee: Individual
•
Filing: 1957-10-24
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Granted: 1966-11-22
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Expires: 1977-10-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Zupanick
- 👤 Donal R Treffeisen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:44
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/93; G01S13/933; G01S13/935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
IN AN AIRCRAFT GUIDANCE SYSTEM, APPARATUS INCLUDING MEANS FOR DETECTING THE PRESENCE AND ANGULAR ORIENTATION OF AN OBSTACLE LYING ALONG THE PATH OF AIRCRAFT TRAVEL, SAID MEANS FOR DETECTING PRODUCING FIRST AND SECOND SIGNALS, SAID FIRST SIGNAL WHEN PRODUCED BEING INDICATIVE OF THE PRESENCE OF AN OBSTACLE, AND SAID SECOND SIGNAL WHEN PRODUCED BEING PROPORTIONAL TO THE ANGULAR DEVIATION OF THE LONGITUDINAL AXIS OF THE AIRCRAFT FROM THE LINE-OF-SIGHT BETWEEN SAID AIRCRAFT AND THE PEAK OF SAID OBSTACLE, MEANS FOR PRODUCING A REFERENCE SIGNAL, MEANS FOR GENERATING A THIRD SIGNAL PROPORTIONAL TO THE AIRCRAFT ANGLE-OF-ATTACK, MEANS FOR COMPARING SAID SECOND SIGNAL WITH THE SUM OF SAID REFERENCE AND THIRD SIGNAL TO PRODUCE A FOURTH SIGNAL PROPORTIONAL TO THE DIFFERENCE BETWEEN SAID SECOND SIGNAL AND SAID SIGNAL SUM, MEANS HAVING A CONTROL INPUT FOR POSITIONING A CONTROL SURFACE OF SAID AIRCRAFT, AND MEANS FOR SELECTIVELY APPLYING SAID FOURTH SIGNAL TO SAID CONTROL INPUT, SAID MEANS FOR SELECTIVELY APPLYING BEING ADAPTED TO RECEIVE SAID FIRST SIGNAL AND SAID FOURTH SIGNAL AND BEING OPERATIVE TO APPLY SAID FOURTH SIGNAL TO SAID CONTROL INPUT IN THE PRESENCE OF SAID FIRST SIGNAL,
Claim 2
Dependent Claim
187 words
IN AN AIRCRAFT GUIDANCE SYSTEM, APPARATUS INCLUDING MEANS FOR DETECTING THE PRESENCE AND ANGULAR ORIENTATION OF AN OBSTACLE LYING ALONG THE PATH OF AIRCRAFT TRAVEL, SAID MEANS FOR DETECTING PRODUCING FIRST AND SECOND SIGNALS, SAID FIRST SIGNAL WHEN PRODUCED BEING INDICATIVE OF THE PRESENCE OF AN OBSTACLE, AND SAID SECOND SIGNAL WHEN PRODUCED BEING PROPORTIONAL TO THE ANGULAR DEVIATION OF THE LONGITUDINAL AXIS OF THE AIRCRAFT FROM THE LINE-OF-SIGHT BETWEEN SAID AIRCRAFT AND THE PEAK OF SAID OBSTACLE, MEANS FOR PRODUCING A REFERENCE SIGNAL, MEANS FOR GENERATING A THIRD SIGNAL PROPORTIONAL TO THE AIRCRAFT ANGLE-OF-ATTACK, MEANS FOR COMPARING SAID SECOND SIGNAL WITH THE SUM OF SAID REFERENCE AND THIRD SIGNAL TO PRODUCE A FOURTH SIGNAL PROPORTIONAL TO THE DIFFERENCE BETWEEN SAID SECOND SIGNAL AND SAID SIGNAL SUM, MEANS HAVING A CONTROL INPUT FOR POSITIONING A CONTROL SURFACE OF SAID AIRCRAFT, AND MEANS FOR SELECTIVELY APPLYING SAID FOURTH SIGNAL TO SAID CONTROL INPUT, SAID MEANS FOR SELECTIVELY APPLYING BEING ADAPTED TO RECEIVE SAID FIRST SIGNAL AND SAID FOURTH SIGNAL AND BEING OPERATIVE TO APPLY SAID FOURTH SIGNAL TO SAID CONTROL INPUT IN THE PRESENCE OF SAID FIRST SIGNAL,
References Cited (Backward Citations)
US2630283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |