US3897031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for providing selected navigational system engage logic
Assignee: Bendix Corp
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Filing: 1974-03-15
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Granted: 1975-07-29
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Expires: 1994-03-15
Abstract
Abstract For use with systems of the type including aircraft navigational beam transmitters and receivers, apparatus for providing logic for selectively engaging said systems by using a signal corresponding to the angular displacement of the aircraft from the beam centerline and a derived signal corresponding to the rate of change of the displacement, and which latter signal has been modified to eliminate noise while providing satisfactory performance at optimum beam displacement and essentially independent of the distance of the craft from the beam transmitter.
Inventors
- 👤 Willy B Moses
- 👤 Nathaniel N Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:09
CPC Classifications
G; G01; G01C; G01C23/00; G01C23/005
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
158 words
Apparatus for providing a signal which engages an aircraft navigational system selected by the pilot of the craft from systems of the type which transmit and receive navigational beams, comprising: receiver means for providing a signal corresponding to the displacement of the aircraft from the centerline of the beam transmitted by the selected system; means for providing a signal corresponding to the rate of change of the displacement; means for limiting the displacement rate signal; means connected to the limiter for adjusting the gain of the limited displacement rate signal in accordance with a predetermined ratio of displacement rate signal gain to selective navigation system displacement signal gain; means for changing the gain adjustment in accordance with the selected navigational system; means for combining the limited, gain adjusted displacement rate signal and the displacement signal; and means connected tO the combining means and responsive to the combined signal for providing a signal for engaging the selected navigational system.
Claim 2
Dependent Claim
158 words
Apparatus for providing a signal which engages an aircraft navigational system selected by the pilot of the craft from systems of the type which transmit and receive navigational beams, comprising: receiver means for providing a signal corresponding to the displacement of the aircraft from the centerline of the beam transmitted by the selected system; means for providing a signal corresponding to the rate of change of the displacement; means for limiting the displacement rate signal; means connected to the limiter for adjusting the gain of the limited displacement rate signal in accordance with a predetermined ratio of displacement rate signal gain to selective navigation system displacement signal gain; means for changing the gain adjustment in accordance with the selected navigational system; means for combining the limited, gain adjusted displacement rate signal and the displacement signal; and means connected tO the combining means and responsive to the combined signal for providing a signal for engaging the selected navigational system.
Claim 3
Dependent Claim
122 words
Apparatus as described by claim 1, including: averaging means connected between the limiting means and the gain adjusting means for averaging the limited displacement rate signal; switching means connected to the limiting means, the averaging means and the gain adjusting means; and means connected to the averaging means and responsive to the averaged limited displacement rate signal for actuating the switching means to disconnect the limiting means from the gain adjustment means and for connecting the averaging means to the gain adjustment means when the averaged signal is below a predetermined level, and for disconnecting the averaging means from the gain adjustment means and for connecting the limiting means to the gain adjusting means when the averaged signal is above said level.
Claim 4
Dependent Claim
99 words
Apparatus as described by claim 1, wherein the means connected to the combining means and responsive to the combined signal for providing a signal for engaging the selected navigational system includes: first means connected to the beam displacement signal means and responsive to the signal therefrom for providing a signal in accordance with the direction from which the aircraft is approaching the beam centerline; and second means connected to the combining means and to the first means and responsive to the signal from the first means and the signal from the combining means for providing the system engage signal.
Claim 5
Dependent Claim
26 words
Apparatus as described by claim 1, including: means for isolating the beam displacement signal; and means for filtering the beam displacement signal to attenuate beam noise.
Claim 6
Dependent Claim
43 words
Apparatus as described by claim 4, wherein the means for providing a signal corresponding to the rate of change of the displacement includes: other filtering means connected to the first mentioned filtering means for filtering the signal therefrom to provide the rate signal.
Claim 7
Dependent Claim
85 words
Apparatus as described by claim 4, wherein the second means includes: means connected to the combining means and to the first means and responsive to the signal from the first means and the signal from the combining means in one sense for providing the system engage signal; and means connected to the combining means and to the first means and responsive to the signal from the first means and the signal from the combining means in an opposite sense for providing the system engage signal.
Claim 8
Dependent Claim
38 words
Apparatus as described by claim 1, including: means connected to the beam displacement signal means for detecting the level of the signal therefrom, and for providing a system engage signal when said level is below a predetermined level.
Claim 9
Dependent Claim
28 words
Apparatus as described by claim 1, wherein the means for combining the limited, gain adjusted displacement rate signal and the displacement signal includes: means for summing said signals.
Claim 10
Dependent Claim
40 words
Apparatus as described by claim 1, wherein: the means connected to the combining means and responsive to the combined signal for providing a signal for engaging the selected navigational system provides said engage signal when the following equation is satisfied:
References Cited (Backward Citations)
US3361391A
Cited
US3824381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |