US3757094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mputers method and apparatus for computing ground speed in area navigation co
Assignee: King Radio Corp
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Filing: 1971-04-19
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Granted: 1973-09-04
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Expires: 1991-04-19
Abstract
Abstract An area navigation computer includes circuitry for computing aircraft ground speed to a waypoint. The ground speed of the aircraft relative to a VORTAC station is determined by information from a DME. Further, a means is provided for determining an angle defined as the included angle between the aircraft bearing to the associated VORTAC station and the aircraft bearing to the waypoint. The above-mentioned DME determined ground speed is then divided by the absolute value of the cosine of the included angle and the quotient is displayed in terms of aircraft ground speed with respect to the waypoint.
Inventors
- 👤 J Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:39
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/78; G01; G01S; G01S1/00; G01S1/02; G05; G05D; G05D1/00; G05D1/02; G05D1/0202
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
In an area navigation computer, including circuitry for computing aircraft ground speed to a waypoint, the improvement comprising; DME means for determining the ground speed of said aircraft relative to a VORTAC station, said means further operaBle to produce an electrical signal which corresponds to the DME distance to said VORTAC, means for determining an angle defined as the included angle between the aircraft bearing to the VORTAC and the aircraft bearing to the waypoint, means for dividing a value corresponding to said DME distance electrical signal by the absolute value of the cosine of said included angle, and means for displaying the quotient of the dividing means in terms of aircraft ground speed with respect to said waypoint.
Claim 2
Dependent Claim
119 words
In an area navigation computer, including circuitry for computing aircraft ground speed to a waypoint, the improvement comprising; DME means for determining the ground speed of said aircraft relative to a VORTAC station, said means further operaBle to produce an electrical signal which corresponds to the DME distance to said VORTAC, means for determining an angle defined as the included angle between the aircraft bearing to the VORTAC and the aircraft bearing to the waypoint, means for dividing a value corresponding to said DME distance electrical signal by the absolute value of the cosine of said included angle, and means for displaying the quotient of the dividing means in terms of aircraft ground speed with respect to said waypoint.
Claim 3
Dependent Claim
31 words
The combination as in claim 1 wherein said angle determining means includes a means for producing the absolute value of the cosine of said included angle as the electrical output thereof.
Claim 4
Dependent Claim
161 words
The combination as in claim 2 wherein said angle determining means includes a first input means having an electrical signal corresponding to the aircraft bearing to said VORTAC thereon, a second input means having an electrical signal corresponding to the aircraft bearing to said waypoint, filter means for filtering said electrical signal corresponding to said aircraft bearing to VORTAC, said filter being connected with said first input means and having an output, a sample and hold circuit said filter output interconnected with an input to said sample and hold circuit, and a sample pulse generator, said sample pulse generator connected with said first and second input means and operable to produce an output pulse when preselected conditions correspond to said bearing signals, said output from said sample pulse generator being transmitted to said sample and hold circuit thereby causing said sample and hold circuit to have an output corresponding to the absolute value of the cosine of the said included angle.
Claim 5
Independent Claim
109 words
A device implemented method for computing aircraft ground speed to waypoint, said method comprising the steps of determining the ground speed of said aircraft relative to a VORTAC station by utilization of a DME, determining an angle defined as the included angle between the aircraft bearing to the VORTAC and the aircraft bearing to the waypoint, electrically representing the absolute value of the cosine of said included angle, electrically representing said DME distance, dividing said electrically represented DME distance by absolute value the cosine of said included angle, and displaying the quotient resulting from said dividing step in terms of said aircraft ground speed with respect to said waypoint.
Claim 6
Independent Claim
109 words
A device implemented method for computing aircraft ground speed to waypoint, said method comprising the steps of determining the ground speed of said aircraft relative to a VORTAC station by utilization of a DME, determining an angle defined as the included angle between the aircraft bearing to the VORTAC and the aircraft bearing to the waypoint, electrically representing the absolute value of the cosine of said included angle, electrically representing said DME distance, dividing said electrically represented DME distance by absolute value the cosine of said included angle, and displaying the quotient resulting from said dividing step in terms of said aircraft ground speed with respect to said waypoint.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |