Patent US3781466A successfully refreshed from Google Patents.
US3781466A
Expired / Lapsed
US
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Information storage apparatus
Assignee: Ferranti International PLC
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Filing: 1972-04-11
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Granted: 1973-12-25
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Expires: 1992-04-11
Abstract
Abstract Information Storage apparatus for use as a back-up store for a moving-map display has the information encoded onto part of the film carrying the map charts. To read the information the optical system is modified so that the information is scanned by a flying-spot scanner.
Inventors
- 👤 Brown K Robson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:22
CPC Classifications
G; G06; G06K; G06K17/00; G06K17/0016; G06K17/0019
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
Information-storage apparatus which includes a strip of film carrying at least one chart and encoded digital information, a viewing screen, a light source and an optical system arranged to project an image of at least part of the chart onto the screen, means for moving the film in two co-ordinate directions so as to display any required part thereof on the screen, a cathode-ray tube and a light-sensitive device together operable as a flyingspot scanner, and means for so modifying the said optical system that light from the cathode-ray is focussed on the film and thence onto the light-sensitive device to read out the encoded digital information.
Claim 2
Dependent Claim
107 words
Information-storage apparatus which includes a strip of film carrying at least one chart and encoded digital information, a viewing screen, a light source and an optical system arranged to project an image of at least part of the chart onto the screen, means for moving the film in two co-ordinate directions so as to display any required part thereof on the screen, a cathode-ray tube and a light-sensitive device together operable as a flyingspot scanner, and means for so modifying the said optical system that light from the cathode-ray is focussed on the film and thence onto the light-sensitive device to read out the encoded digital information.
Claim 3
Dependent Claim
32 words
Information-storage apparatus as claimed in claim 1 in which the cathode-ray tube is operable to produce a spot of light which scans across the film in a direction transverse to its length.
Claim 4
Dependent Claim
27 words
Information-storage apparatus as claimed in claim 1 in which the cathode-ray tube is used to provide a display which may be combined with that from said film.
Claim 5
Dependent Claim
20 words
Information-storage apparatus as claimed in claims 3 in which the display produced by the cathode-ray tube is a radar-type display.
Claim 6
Dependent Claim
29 words
Information-storage apparatus as claimed in claim 1 in which the means for modifying the said optical system is operable to replace the light source by the light sensitive device.
Claim 7
Dependent Claim
37 words
Information-storage apparatus as claimed in claim 5 in which the means for modifying the optical system is also operable to replace the viewing screen by means for directing the light from the cathode-ray tube onto the film.
Claim 8
Dependent Claim
49 words
Information-storage apparAtus as claimed in claim 5 in which the cathode-ray tube has an envelope with a window therein and a screen, and provides a display which is combined with that of said film by projecting the said image through said window onto the screen of the cathode-ray tube.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |