US3301128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projector apparatus
Assignee: Individual
•
Filing: 1963-11-04
•
Granted: 1967-01-31
•
Expires: 1983-11-04
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Brandt
- 👤 John P Schoentgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:40
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/08; G03B23/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
PROJECTION APPARATUS COMPRISING: A LIGHT SOURCE; A PROJECTION LENS; A PROJECTION GATE INTERMEDIATE TO AND HAVING AN OPENING THERETHROUGH ALIGNED WITH SAID LENS AND LIGHT SOURCE; MEANS FOR SUPPORTING A FILM TRANSPARENCY AGAINST SAID GATE IN LINE WITH SAID OPENING TO PROJECT THE IMAGE THEREON THROUGH SAID PROJECTION LENS, THE SURFACE OF SAID GATE AGAINST WHICH SAID FILM TRANSPARENCY IS SUPPORTED BEING CURVED IN THE DIRECTION OF MOVEMENT OF THE FILM, AND SAID FILM CONFORMING TO SAID CURVATURE TO HAVE PHYSICAL STABILITY AGAINST POSITIONAL DISTORTION UNDER THE HEAT OF SAID LIGHT SOURCE; AND A SCREEN UPON WHICH THE FILM IMAGE IS PROJECTED, SAID SCREEN HAVING A CURVATURE SUBSTANTIALLY OPTICALLY CONCENTRIC WITH THE CURVATURE OF SAID GATE SURFACE SO THAT POINTS ON THE SCREEN IMAGE ARE SUBSTANTIALLY EQUIDISTANT FROM CORRESPONDING POINTS ON THE IMAGE ON THE FILM.
Claim 2
Dependent Claim
136 words
PROJECTION APPARATUS COMPRISING: A LIGHT SOURCE; A PROJECTION LENS; A PROJECTION GATE INTERMEDIATE TO AND HAVING AN OPENING THERETHROUGH ALIGNED WITH SAID LENS AND LIGHT SOURCE; MEANS FOR SUPPORTING A FILM TRANSPARENCY AGAINST SAID GATE IN LINE WITH SAID OPENING TO PROJECT THE IMAGE THEREON THROUGH SAID PROJECTION LENS, THE SURFACE OF SAID GATE AGAINST WHICH SAID FILM TRANSPARENCY IS SUPPORTED BEING CURVED IN THE DIRECTION OF MOVEMENT OF THE FILM, AND SAID FILM CONFORMING TO SAID CURVATURE TO HAVE PHYSICAL STABILITY AGAINST POSITIONAL DISTORTION UNDER THE HEAT OF SAID LIGHT SOURCE; AND A SCREEN UPON WHICH THE FILM IMAGE IS PROJECTED, SAID SCREEN HAVING A CURVATURE SUBSTANTIALLY OPTICALLY CONCENTRIC WITH THE CURVATURE OF SAID GATE SURFACE SO THAT POINTS ON THE SCREEN IMAGE ARE SUBSTANTIALLY EQUIDISTANT FROM CORRESPONDING POINTS ON THE IMAGE ON THE FILM.
References Cited (Backward Citations)
GB190205306A
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US1489510A
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US1590704A
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US1856234A
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US2520410A
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US3219406A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |