US3751152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microfilm reader apparatus with automatic updating display means
Assignee: RA Morgan Co Inc
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Filing: 1971-02-22
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Granted: 1973-08-07
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Expires: 1991-02-22
Abstract
Abstract A microfilm reader system for simultaneously scanning a first strip of film, containing a first set of data photographically stored thereupon, and a second strip of film, containing a second set of data for updating certain portions of the data stored on the first film, to locate a particular image on each film and then preferentially display one of the images. The system includes electronic data handling apparatus for enabling the automatic selection and display of a particular image in response to a particular input address signal.
Inventors
- 👤 L Rinehart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:18
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
173 words
A microfilm reader system comprising: a first filmstrip containing a plurality of photographically stored original images; means for generating a signal of an address; first film transport means operative responsive to said address signal to select and position for optical projection a particular one of said original images from of said film strip; a second, continuous and longitudinally movable, filmstrip containing a plurality of photographically stored update images; means responsive to said address signal, including second filmstrip transport means for scanning said second filmstrip to locate and position for optical projection any update image thereon corresponding to said address; means for optically projecting at least one of said positioned original and update images; display means including a display screen for displaying said optically projected image; means for determining the simultaneous presence of said one original image and said update image at their positions for optical projection; and selectively positionable reflector means operative responsive to said determining means to selectively reflect only one of said projected original and update images onto said display screen.
Claim 2
Dependent Claim
173 words
A microfilm reader system comprising: a first filmstrip containing a plurality of photographically stored original images; means for generating a signal of an address; first film transport means operative responsive to said address signal to select and position for optical projection a particular one of said original images from of said film strip; a second, continuous and longitudinally movable, filmstrip containing a plurality of photographically stored update images; means responsive to said address signal, including second filmstrip transport means for scanning said second filmstrip to locate and position for optical projection any update image thereon corresponding to said address; means for optically projecting at least one of said positioned original and update images; display means including a display screen for displaying said optically projected image; means for determining the simultaneous presence of said one original image and said update image at their positions for optical projection; and selectively positionable reflector means operative responsive to said determining means to selectively reflect only one of said projected original and update images onto said display screen.
Claim 3
Dependent Claim
39 words
A microfilm reader system as recited in claim 1 wherein said first filmstrip further contains first indicator means and said first transport means includes first sensor means for detecting said first indicator means and providing first filmstrip position signals.
Claim 4
Dependent Claim
40 words
A microfilm reader system as recited in claim 2 wherein said second filmstrip further contains second indicator means, and said second transport means includes a second sensor means for detecting said second indicator means and providing second filmstrip position signals.
Claim 5
Dependent Claim
24 words
A microfilm reader system as recited in claim 3 wherein said determining means is operative responsive to said first and second filmstrip position signals.
Claim 6
Dependent Claim
56 words
A microfilm reader system as recited in claim 1 wherein said optical projection means includes a first source of illumination for projecting said one original image onto said display means, and film positioning means responsive to said address signal operative to cause selective bidirectional movement of said first filmstrip relative to said first source of illumination.
Claim 7
Dependent Claim
48 words
A microfilm reader system as recited in claim 5 wherein said projection means includes a second source of illumination for projecting said update image onto said display means, said second transport being operative to cause selective movement of said second filmstrip relative to said second source of illumination.
Claim 8
Dependent Claim
39 words
A microfilm reader system as recited in claim 1 wherein said second filmstrip further contains second indicator means and said second transport means includes second sensor means for detecting said second indicator means and providing second filmstrip position signals.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |