US3226719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geographic coordinate-indicating navigation apparatus for hyperbolic systems
Assignee: Computing Devices of Canada Ltd
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Filing: 1963-08-01
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Granted: 1965-12-28
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Expires: 1983-08-01
Abstract
No abstract record available.
Inventors
- 👤 Chown Bruce Farrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:23
CPC Classifications
G; G01; G01S; G01S5/00; G01S5/02; G01S5/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
149 words
APPARATUS FOR USE IN THE NAVIGATION OF A MOBILE CRAFT WITH POSITION FINDING RADIO SYSTEMS OF THE HYPERBOLIC TYPE COMPRISING MEANS FOR PROVIDING A PAIR OF SIGNALS REPRESENTATIVE OF PATH-LENGTH DIFFERENCES FROM SAID CRAFT TO TWO PAIRS OF GEOGRAPHIC REFERENCE POINTS, SETTABLE MEANS FOR PROVIDING: A PAIR OF SIGNALS REPRESENTATIVE OF THE COORDIANTES OF A GEOGRAPHIC REFERENCE POINT MIDWAY ON A LINE BETWEEN ONE PAIR OF SAID REFERENCE POINTS IN A CARTESIAN GRID SYSTEM BASED ON THE OTHER PAIR OF SAID POSITIONS; A SIGNAL REPRESENTATIVE OF THE ANGULAR INCONGRUENCE BETWEEN SAID LINE AND AN AXIS OF SAID GRID SYSTEM; AND A PAIR OF SIGNALS REPRESENTATIVE OF THE SEMI-BASE DISTANCES OF THE PAIR OF HYPERBOLAE INTERSECTING IN THE CRAFT POSITION AND BASED ON RESPECTIVE PAIRS OF SAID STATIONS; AND COMPUTING MEANS RESPONSIVE TO ALL OF SAID SIGNALS JOINTLY FOR CONTINUOUSLY INDICATING THE POSITION OF SAID CRAFT IN SAID GRID SYTEM.
References Cited (Backward Citations)
US2530429A
Cited
US3020545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |