US3232689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for preventing fall-off in light intensity in projected images
Assignee: Smith Dieterich Corp
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Filing: 1963-03-04
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Granted: 1966-02-01
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Expires: 1983-03-04
Abstract
No abstract record available.
Inventors
- 👤 Smith Philip Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:20
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/20; G03B21/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN THE PROJECTION OF MOTION PICTURES FROM FILM TRANSPARENCIES WITH A MOTION PICTURE PROJECTOR WHICH DIRECTS A LIGHT BEAM THROUGH THE FILM TRANSPARENCIES AND THROUGH AN IMAGE FORMING LENS TO REPRODUCE ON A SCREEN THE SCENES ON THE TRANSPARENCIES, A METHOD FOR MINIMIZING THE FALL OFF IN LIGHT INTENSITY FROM THE CENTER TO THE EDGES OF EACH SCENE SO REPRODUCED COMPRISING MOVING THE CENTER OF THE LIGHT BEAM IN A PATH ACROSS EACH OF THE TRANSPARENCIES BY RAPIDLY AND CONTINUOUSLY DEFLECTING THE LIGHT BEAM SO THAT THE MOVEMENT OF THE LIGHT BEAM IS IMPERCEPTIBLE TO VIEWERS OF THE REPRODUCED IMAGES WHILE AT THE SAME TIME DECREASING THE MENTIONED FALL OFF IN LIGHT INTENSITY PERCEIVED BY SAID VIEWERS.
Claim 2
Dependent Claim
117 words
IN THE PROJECTION OF MOTION PICTURES FROM FILM TRANSPARENCIES WITH A MOTION PICTURE PROJECTOR WHICH DIRECTS A LIGHT BEAM THROUGH THE FILM TRANSPARENCIES AND THROUGH AN IMAGE FORMING LENS TO REPRODUCE ON A SCREEN THE SCENES ON THE TRANSPARENCIES, A METHOD FOR MINIMIZING THE FALL OFF IN LIGHT INTENSITY FROM THE CENTER TO THE EDGES OF EACH SCENE SO REPRODUCED COMPRISING MOVING THE CENTER OF THE LIGHT BEAM IN A PATH ACROSS EACH OF THE TRANSPARENCIES BY RAPIDLY AND CONTINUOUSLY DEFLECTING THE LIGHT BEAM SO THAT THE MOVEMENT OF THE LIGHT BEAM IS IMPERCEPTIBLE TO VIEWERS OF THE REPRODUCED IMAGES WHILE AT THE SAME TIME DECREASING THE MENTIONED FALL OFF IN LIGHT INTENSITY PERCEIVED BY SAID VIEWERS.
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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |