Patent US4319805A successfully refreshed from Google Patents.
US4319805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary screen for receiving optical images particularly advertising images
Assignee: Individual
•
Filing: 1980-02-04
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Granted: 1982-03-16
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Expires: 2000-02-04
Abstract
Abstract A rotary screen mounted in the median area of a preferably spherical enclosure, the rear face of which being made opaque except in its central portion, while its front face is perfectly transparent, a projector being placed rearwardly of the enclosure in central axis of the portion which is not opaque in order to enable light rays from the prospector to pass through the enclosure to reach the rotary screen.
Inventors
- 👤 Pierre Nicolas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:15
CPC Classifications
G; G09; G09F; G09F19/00; G09F19/12; G09F19/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
A rotary screen for receiving optical images provided by a projector, said screen being a translucent screen rotatable on itself and mounted in median area of a spherical enclosure having a rear face and a front face, said rear face being opaque except in a central transparent portion and said front face being transparent, the projector being mounted rearwardly of said spherical enclosure in center axis of said rear face transparent portion in order to enable light rays from the projector to pass through said transparent portion of said spherical enclosure rear face to reach the screen.
Claim 2
Dependent Claim
97 words
A rotary screen for receiving optical images provided by a projector, said screen being a translucent screen rotatable on itself and mounted in median area of a spherical enclosure having a rear face and a front face, said rear face being opaque except in a central transparent portion and said front face being transparent, the projector being mounted rearwardly of said spherical enclosure in center axis of said rear face transparent portion in order to enable light rays from the projector to pass through said transparent portion of said spherical enclosure rear face to reach the screen.
Claim 3
Dependent Claim
28 words
The rotary screen of claim 1 wherein the rear face of the spherical enclosure is made opaque by a coating adhering to the rear face of said enclosure.
Claim 4
Dependent Claim
28 words
The rotary screen of claim 1 further comprising a support having an arcuate front part supporting in cantilever fashion the spherical enclosure in which is mounted the screen.
Claim 5
Dependent Claim
134 words
A rotary screen for receiving optical images provided by a projector, said screen being a translucent screen rotatable on its end mounted in median area of a spherical enclosure having a rear face and a front face, said rear face being opaque except in a central transparent portion and said front face being transparent, the projector being mounted rearwardly of said spherical enclosure in center axis of said transparent portion in order to enable light rays from the projector to pass through said transparent portion of said spherical enclosure rear face to reach the screen, wherein the rear face of the spherical enclosure is made opaque by a coating adhering to the rear face of said enclosure, said coating being a reflecting coating for improving brightness of the images projected by said light rays.
Claim 6
Dependent Claim
134 words
A rotary screen for receiving optical images provided by a projector, said screen being a translucent screen rotatable on its end mounted in median area of a spherical enclosure having a rear face and a front face, said rear face being opaque except in a central transparent portion and said front face being transparent, the projector being mounted rearwardly of said spherical enclosure in center axis of said transparent portion in order to enable light rays from the projector to pass through said transparent portion of said spherical enclosure rear face to reach the screen, wherein the rear face of the spherical enclosure is made opaque by a coating adhering to the rear face of said enclosure, said coating being a reflecting coating for improving brightness of the images projected by said light rays.
Claim 7
Dependent Claim
28 words
The rotary screen of claim 4 further comprising a support having an arcuate front portion supporting in cantilever fashion the spherical enclosure in which is mounted the screen.
References Cited (Backward Citations)
US3134299A
Cited
US3480346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-15 | 1985-09-14 | 1986-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-15 | 1989-09-14 | 1990-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-15 | 1993-09-14 | 1994-03-16 | $7700.00 | Window Closed / Lapsed |