US3774017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for achieving optimum performance of an airplane
Assignee: Honeywell Inc
•
Filing: 1971-10-21
•
Granted: 1973-11-20
•
Expires: 1991-10-21
Abstract
Abstract Apparatus for providing a pilot of an airplane with an indication of the specific energy of the airplane and a method for operating an airplane at an optimum level of performance by the application of the apparatus.
Inventors
- 👤 N Zagalsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:52
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/78; G01; G01C; G01C23/00; G05; G05D; G05D1/00; G05D1/0005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
74 words
Apparatus for providing a continuous indication of the specific energy of an airplane comprising, in combination: means for producing a first signal representative of the specific kinetic energy of the airplane; means for producing a second signal representative of the specific potential energy of the airplane; and output means connected to receive said first and second signals for providing an indication of their sum as a measure of the specific energy of the aircraft.
Claim 2
Dependent Claim
74 words
Apparatus for providing a continuous indication of the specific energy of an airplane comprising, in combination: means for producing a first signal representative of the specific kinetic energy of the airplane; means for producing a second signal representative of the specific potential energy of the airplane; and output means connected to receive said first and second signals for providing an indication of their sum as a measure of the specific energy of the aircraft.
Claim 3
Dependent Claim
99 words
The apparatus of claim 1 wherein the first named means comprises: condition responsive means for producing a first voltage signal which varies in real time with the true airspeed of the airplane; a squaring circuit for receiving said first voltage signal said squaring circuit being operative for producing a second voltage signal indicative of the square of said first voltage signal; and a dividing circuit for receiving said second voltage signal, said dividing circuit being operative for dividing said second voltage signal by twice the acceleration due to gravity, thereby producing said first signal indicative of the kinetic energy.
Claim 4
Dependent Claim
66 words
The apparatus of claim 1 wherein said output means comprises: an adding circuit for receiving said first and second signals, said adding cIrcuit being operative for producing a third signal indicative of the sum of said first and second signals; and an indicator for receiving said third signal, said indicator being operative for providing an indication to the pilot of the value of said third signal.
Claim 5
Dependent Claim
92 words
Apparatus according to claim 3, in which said indicator comprises: a first fixed scale graduated in units of energy; a needle moveable along said scale in accordance with the actual energy of the aircraft; and a second fixed scale aligned with the first scale and graduated in units of a parameter related to energy having predetermined values for values of energy aligned therewith on said first scale, so that any needle position can be read both as the actual value of aircraft energy and as the related predetermined value of the parameter.
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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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |