US3225138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for reducing brightness variation using photochromic material
Assignee: Unisys Corp
•
Filing: 1963-06-21
•
Granted: 1965-12-21
•
Expires: 1983-06-21
Abstract
No abstract record available.
Inventors
- 👤 Montani Angelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:06
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J2229/00; H01J2229/89; H01J2229/8926
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A DEVICE FOR DECREASING THE VARIATIONS OF LIGHT INTENSITY OF AN IMAGE FORMED ON A TELEVISION CARMERA TUBE TARGET SURFACE, COMPRISING: (A) A PHOTOCHROMIC LAYER ADAPTED TO BE OPTICALLY ALIGNED WITH SAID TARGET SURFACE SUCH THAT THE IMAGE OF THE TELEVISED SCENE PASSES THROUGH SAID LAYER, (B) A CATHODE RAY TUBE WHOSE FACE IS OPTICALLY ALIGNED WITH SAID LAYER SUCH THAT MASKING IMAGE PRODUCED IN THE PHOTOCHROMIC LAYER BY LIGHT TRANSMITTED FROM THE FACE OF THE CATHODE RAY TUBE IS REGISTERED WITH THE IMAGE OF THE TELEVISED SCENE PROJECTED THROUGH SAID LAYER, AND (C) MEANS FOR ELECTRICALLY CONNECTING THE TELEVISION CAMERA TUBE WITH SAID CATHODE RAY TUBE FOR FORMING A RASTER ON THE FACE OF THE CATHODE RAY TUBE CORRESPONDING TO THE RASTER ON THE TARGET SURFACE OF SAID TELEVISION CAMERA TUBE AND FOR MODULATING THE INTENSITY OF THE LIGHT PRODUCED BY THE PHOSPHOR ELEMENTS ON THE FACE OF THE CATHODE RAY TUBE RESPONSIVE TO THE OUTPUT VIDEO SIGNAL PRODUCED BY THE TELEVISION CAMERA TUBE.
Claim 2
Independent Claim
165 words
A DEVICE FOR DECREASING THE VARIATIONS OF LIGHT INTENSITY OF AN IMAGE FORMED ON A TELEVISION CARMERA TUBE TARGET SURFACE, COMPRISING: (A) A PHOTOCHROMIC LAYER ADAPTED TO BE OPTICALLY ALIGNED WITH SAID TARGET SURFACE SUCH THAT THE IMAGE OF THE TELEVISED SCENE PASSES THROUGH SAID LAYER, (B) A CATHODE RAY TUBE WHOSE FACE IS OPTICALLY ALIGNED WITH SAID LAYER SUCH THAT MASKING IMAGE PRODUCED IN THE PHOTOCHROMIC LAYER BY LIGHT TRANSMITTED FROM THE FACE OF THE CATHODE RAY TUBE IS REGISTERED WITH THE IMAGE OF THE TELEVISED SCENE PROJECTED THROUGH SAID LAYER, AND (C) MEANS FOR ELECTRICALLY CONNECTING THE TELEVISION CAMERA TUBE WITH SAID CATHODE RAY TUBE FOR FORMING A RASTER ON THE FACE OF THE CATHODE RAY TUBE CORRESPONDING TO THE RASTER ON THE TARGET SURFACE OF SAID TELEVISION CAMERA TUBE AND FOR MODULATING THE INTENSITY OF THE LIGHT PRODUCED BY THE PHOSPHOR ELEMENTS ON THE FACE OF THE CATHODE RAY TUBE RESPONSIVE TO THE OUTPUT VIDEO SIGNAL PRODUCED BY THE TELEVISION CAMERA 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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |