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Patent US3297822A successfully refreshed from Google Patents.
US3297822A
Expired / Lapsed
US
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Navigation system with optical means for providing a superimposed composite image of a cathode ray tube display and a further map display
Assignee: Ferranti International PLC
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Filing: 1963-06-20
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Granted: 1967-01-10
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Expires: 1983-06-20
Abstract
No abstract record available.
Inventors
- 👤 Braid James Muir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:08
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01C; G01C21/00; G01C21/20; G01C21/22; G01S1/00; G01S1/02; G01S7/00; G01S7/02; G01S7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A NAVIGATION SYSTEM INCLUDING A CATHODE-RAY TUBE ARRANGED TO PROVIDE ON ITS SCREEN A RADAR MAP DISPLAY OF THE TERRAIN BEING TRAVERSED, MEANS FOR PROVIDING A FURTHER MAP DISPLAY OF THE TERRAIN, AND AN OPTICAL SYSTEM INCLUDING MEANS DISPOSED FOR PROJECTING SAID FURTHER DISPLAY ONTO SAID SCREEN SO THAT THE TWO DISPLAYS ARE THERE SUPERIMPOSED IN REGISTER WITH ONE ANOTHER TO PROVIDE A COMPOSITE DISPLAY, A LENS SYSTEM FOR PROVIDING AN OBSERVER WITH AN IMAGE AT OR NEAR INFINITY OF THE COMPOSITE DISPLAY, AND A SEMI-TRANSPARENT MIRROR DISPOSED ACROSS THE OPTICAL PATH FROM SAID FURTHER DISPLAY TO SAID SCREEN SO AS TO REFLECT THE COMPOSITE DISPLAY TOWARDS SAID LENS SYSTEM.
Claim 2
Dependent Claim
110 words
A NAVIGATION SYSTEM INCLUDING A CATHODE-RAY TUBE ARRANGED TO PROVIDE ON ITS SCREEN A RADAR MAP DISPLAY OF THE TERRAIN BEING TRAVERSED, MEANS FOR PROVIDING A FURTHER MAP DISPLAY OF THE TERRAIN, AND AN OPTICAL SYSTEM INCLUDING MEANS DISPOSED FOR PROJECTING SAID FURTHER DISPLAY ONTO SAID SCREEN SO THAT THE TWO DISPLAYS ARE THERE SUPERIMPOSED IN REGISTER WITH ONE ANOTHER TO PROVIDE A COMPOSITE DISPLAY, A LENS SYSTEM FOR PROVIDING AN OBSERVER WITH AN IMAGE AT OR NEAR INFINITY OF THE COMPOSITE DISPLAY, AND A SEMI-TRANSPARENT MIRROR DISPOSED ACROSS THE OPTICAL PATH FROM SAID FURTHER DISPLAY TO SAID SCREEN SO AS TO REFLECT THE COMPOSITE DISPLAY TOWARDS SAID LENS SYSTEM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |