US3147424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the vertical rate of an aircraft
Assignee: Unisys Corp
•
Filing: 1961-12-22
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Granted: 1964-09-01
•
Expires: 1981-12-22
Abstract
No abstract record available.
Inventors
- 👤 Miller Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:46
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/04; G05D1/06; G05D1/0607
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
APPARATUS FOR CONTROLLING THE VERTICAL RATE OF A CRAFT SO THAT SAID CRAFT FLIES AT A PARTICULAR COMMANDED FLIGHT PATH ANGLE COMPRISING MEANS PRODUCING A SIGNAL REPRESENTING THE COMMANDED FLIGHT PATH ANGLE OF SAID CRAFT, PITOT-STATIC PRESSURE SENSING MEANS PRODUCING A SIGNAL WHEN SAID CRAFT MOVES SUBSTANTIALLY IN THE DIRECTION OF ITS LONGITUDINAL AXIS, MEANS SENSING STATIC PRESSURE PRODUCING A REPRESENTATIVE SIGNAL THEREOF, MEANS PRODUCING A SIGNAL REPRESENTING THE RATE OF CHANGE OF STATIC PRESSURE, MEANS RECEIVING SAID STATIC AND PITOT-STATIC PRESSURE SIGNALS PRODUCING A MODIFYING SIGNAL REPRESENTING THE SQUARE ROOT OF THEIR PRODUCT, MEANS RECEIVING SAID FLIGHT PATH ANGLE AND MODIFYING SIGNALS PRODUCING AN OUTPUT SIGNAL PROPORTIONAL TO THEIR PRODUCT, AND MEANS ALGEBRAICALLY ADDING SAID RATE OF CHANGE OF STATIC PRESSURE SIGNAL TO SAID PRODUCT SIGNAL TO PRODUCE AN ERROR SIGNAL, WHEREBY SAID CRAFT MAY BE MADE TO FLY AT SAID COMMANDED FLIGHT PATH ANGLE BY KEEPING THE RATE OF CHANGE OF PRESSURE SIGNAL SUCH THAT SAID ERROR SIGNAL IS ZERO.
Claim 2
Dependent Claim
162 words
APPARATUS FOR CONTROLLING THE VERTICAL RATE OF A CRAFT SO THAT SAID CRAFT FLIES AT A PARTICULAR COMMANDED FLIGHT PATH ANGLE COMPRISING MEANS PRODUCING A SIGNAL REPRESENTING THE COMMANDED FLIGHT PATH ANGLE OF SAID CRAFT, PITOT-STATIC PRESSURE SENSING MEANS PRODUCING A SIGNAL WHEN SAID CRAFT MOVES SUBSTANTIALLY IN THE DIRECTION OF ITS LONGITUDINAL AXIS, MEANS SENSING STATIC PRESSURE PRODUCING A REPRESENTATIVE SIGNAL THEREOF, MEANS PRODUCING A SIGNAL REPRESENTING THE RATE OF CHANGE OF STATIC PRESSURE, MEANS RECEIVING SAID STATIC AND PITOT-STATIC PRESSURE SIGNALS PRODUCING A MODIFYING SIGNAL REPRESENTING THE SQUARE ROOT OF THEIR PRODUCT, MEANS RECEIVING SAID FLIGHT PATH ANGLE AND MODIFYING SIGNALS PRODUCING AN OUTPUT SIGNAL PROPORTIONAL TO THEIR PRODUCT, AND MEANS ALGEBRAICALLY ADDING SAID RATE OF CHANGE OF STATIC PRESSURE SIGNAL TO SAID PRODUCT SIGNAL TO PRODUCE AN ERROR SIGNAL, WHEREBY SAID CRAFT MAY BE MADE TO FLY AT SAID COMMANDED FLIGHT PATH ANGLE BY KEEPING THE RATE OF CHANGE OF PRESSURE SIGNAL SUCH THAT SAID ERROR SIGNAL IS ZERO.
References Cited (Backward Citations)
US2896145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |